Engineering Tools

Find the technical capability you need across cloud, SRE, security, Kubernetes, networking, data, CI/CD, platform engineering, and more. These 321 tools are currently admitted to Utility Matrix's public discovery surface; additional capabilities remain under quality review before promotion.

321 public tools · 31 technical categories · no signup required · browser-local where the tool contract permits

Engineering decision paths

Start with the decision you need to make. These paths combine existing Utility Matrix capabilities without binding the technical answer to a specific vendor.

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Agile 2

DORA Metrics Calculator
Calculate your DORA performance tier from deployment frequency, lead time, failure rate, and MTTR.
Sprint Velocity Calculator
Calculate sprint velocity trend, capacity-adjusted forecast, and commitment accuracy.

Api 12

API Error Format Checker
Validate API error response format against RFC 7807 Problem Details and common conventions.
API Pagination Calculator
Compare offset vs cursor pagination performance and calculate page counts.
API Versioning Strategy Reference
Reference guide to API versioning strategies — URL, header, query param, and Sunset header.
CORS Header Validator
Validate CORS response headers for credentials, wildcards, and preflight correctness.
GraphQL Schema Validator
Validate GraphQL SDL schema syntax, type correctness, and structural requirements.
HTTP Content Negotiation Reference
Reference guide to HTTP Accept, Content-Type, Vary headers and content negotiation.
HTTP Status Code Reference
Reference guide to HTTP status codes — correct usage, common misuse, and caching behavior.
Idempotency Key Reference
Reference guide to API idempotency — key format, TTL, scope, and implementation patterns.
OpenAPI Response Schema Checker
Validate OpenAPI 3.x response schema objects for correctness and completeness.
Rate Limit Header Generator
Generate correct HTTP rate limit response headers from your limits and remaining quota.
REST API Naming Checker
Validate REST API endpoint paths against naming convention best practices.
Webhook Signature Validator
Validate and verify webhook HMAC signatures for GitHub, Stripe, Twilio, and Svix.

Auth 1

JWT Decoder
Inspect tokens, claims, and expiry. Decodes locally in your browser; signature is not verified.

Cicd 13

Build Time Regression Detector
Detect CI build time regressions and calculate daily developer time cost.
CI Artifact Retention Cost Calculator
Calculate GitHub Actions artifact storage cost from artifact size and retention period.
CI Cache Hit Rate Calculator
Calculate cache effectiveness and time savings from cache hit rate and install duration.
CI/CD Pipeline Cost Calculator
Calculate monthly GitHub Actions pipeline cost from job duration and run frequency.
CI/CD Security Reference
Reference guide to CI/CD security — OIDC credentials, secret management, and supply chain risks.
Deployment Frequency Calculator
Calculate DORA deployment frequency tier and per-developer deployment rate.
Flaky Test Impact Calculator
Calculate CI pipeline failure rate and developer time cost from flaky test percentage.
GitHub Actions Context Reference
Reference guide to GitHub Actions contexts — github, runner, env, steps, secrets, and needs.
GitHub Actions Syntax Reference
Reference guide to GitHub Actions workflow syntax — triggers, matrix, reusable workflows, and contexts.
Pipeline Concurrency Calculator
Calculate queue time and required concurrent job slots from pipeline load and run time.
Pipeline Parallelism Calculator
Calculate CI/CD pipeline wall-clock time and parallelism efficiency using Amdahl's Law.
Release Pipeline Stage Calculator
Calculate release pipeline wall-clock time and failure probability from stage count and duration.
Test Split Calculator
Calculate optimal test shard count and wall-clock time from test suite duration and setup overhead.

Cloud 12

AWS ARN Parser
Parse and explain AWS ARN structure — partition, service, region, account, resource.
AWS Service Quota Reference
Quick reference for AWS service quotas — default limits, adjustable vs hard limits.
Azure RBAC Role Reference
Reference guide to Azure RBAC built-in roles, scopes, Actions vs DataActions, and Managed Identity.
Cloud Cost Anomaly Threshold Calculator
Calculate optimal cost anomaly alert thresholds from spend level and volatility.
Cloud NAT Bandwidth Cost Calculator
Calculate NAT Gateway vs NAT instance cost from daily outbound traffic volume.
CloudWatch Metric Math Reference
Reference guide to CloudWatch Metric Math functions — RATE, SEARCH, FILL, IF, and more.
GCP Service Account Permission Reference
Reference guide to GCP IAM roles, permissions, and service account best practices.
IAM Condition Operator Reference
Reference guide to AWS IAM condition operators — String, Numeric, Date, Bool, and set operators.
IAM Policy JSON Validator
Validate AWS IAM policy JSON structure, actions, resources, and condition operators.
Lambda Cold Start Estimator
Estimate AWS Lambda cold start duration by runtime, memory, and package size.
S3 Lifecycle Cost Calculator
Model S3 storage costs with lifecycle transitions to IA, Glacier, and Deep Archive.
VPC Subnet Planner
Plan VPC subnets from a CIDR block — automatically divided into tiers across AZs.

Compliance 22

Audit Log Requirement Reference
Reference guide to audit log requirements by framework — SOC 2, HIPAA, PCI DSS retention.
Breach Notification Timeline Calculator
Calculate breach notification deadlines from discovery date across GDPR, HIPAA, PCI, and state laws.
CCPA/CPRA Rights Reference
Reference guide to CCPA and CPRA consumer rights, applicability thresholds, and response requirements.
Compliance Evidence Checklist
Reference guide to compliance evidence types and collection requirements by framework.
CycloneDX SBOM Validator
Validate CycloneDX SBOM structure against v1.4 and v1.5 JSON schema.
Data Retention Policy Calculator
Look up minimum retention periods by data type and jurisdiction.
GDPR Reference
Reference guide to GDPR requirements — lawful basis, data subject rights, and Article 30.
Go Module Path Validator
Validate Go module paths and check major version suffix requirements.
HIPAA Safeguard Reference
Reference guide to HIPAA administrative, physical, and technical safeguards.
ISO 27001 Control Reference
Reference guide to ISO 27001:2022 Annex A controls and ISMS requirements.
License Compatibility Checker
Check whether two open source licenses are compatible for your use case.
npm License Auditor
Audit npm package licenses for compliance risk before adding dependencies.
OSI License Reference
Search all OSI-approved licenses with type, GPL compatibility, and patent clause status.
PCI DSS Scope Calculator
Determine PCI DSS scope and SAQ type from cardholder data environment configuration.
Privacy by Design Reference
Reference guide to Privacy by Design principles, DPIA requirements, and privacy engineering patterns.
REUSE Compliance Checker
Validate REUSE specification file header format for SPDX copyright and license identifiers.
SBOM Format Comparator
Compare CycloneDX and SPDX SBOM formats for NTIA, EU CRA, and VEX compliance.
SLSA Level Reference
Look up SLSA level requirements, provenance format, and implementation guidance.
SOC 2 Control Reference
Searchable reference for SOC 2 Trust Services Criteria — CC, A, C, PI, and Privacy.
SPDX Expression Validator
Validate SPDX license expression syntax — AND, OR, WITH operators and LicenseRef identifiers.
Supply Chain Risk Reference
Reference guide to software supply chain attack types, mitigations, and tooling.
Vendor Risk Tier Calculator
Classify vendor risk tier and determine required due diligence from data access profile.

Containers 14

Build Cache Sizing Calculator
Size a CI build cache from daily builds, unique layers per build, average layer size, and retention window. Browser-o...
Container Base Image Comparison
Compare container base images by size, compatibility, and attack surface for your runtime.
Container Image Size Estimator
Estimate container image size from base image, app layer, and multi-stage build strategy.
Container Image Tag Strategy Reference
Reference guide to container image tagging strategies — digest pinning, SHA tags, semver, and retention.
Container Networking Reference
Reference guide to container networking — bridge, host, overlay networks, CNI, and service discovery.
Container Registry Cost Calculator
Calculate monthly container registry storage and egress costs across Docker Hub, ECR, and DigitalOcean.
Container Runtime Reference
Reference guide to container runtimes — containerd, runc, gVisor, Kata Containers, and OCI.
Container Security Scanner Reference
Reference guide to container security scanners — Trivy, Grype, Snyk Container, and Docker Scout.
Distroless Container Image Reference
Reference guide to Google distroless base images — static, base, java, and debug variants.
Docker Compose Validator
Validate Docker Compose YAML for syntax errors, depends_on conditions, and secret handling.
Dockerfile Cache Optimizer
Calculate time savings from optimizing Dockerfile layer caching order and cache hit rate.
Dockerfile Linter
Check Dockerfiles for :latest tags, root USER, and missing HEALTHCHECK.
Multi-Stage Build Size Analyzer
Calculate multi-stage Docker build size savings from build vs runtime image sizes.
OCI Image Spec Reference
Reference guide to the OCI Image Specification — manifests, layers, config, and multi-platform images.

Cost 13

Build vs Buy Calculator
Calculate 3-year TCO for building vs buying a software capability.
Cloud Spend Estimator
Estimate and compare cloud compute costs across AWS, GCP, and DigitalOcean.
Developer Productivity ROI Calculator
Calculate ROI of developer tooling and productivity investments from hours saved.
Engineering Hour Cost Calculator
Calculate fully-loaded engineering hourly cost from salary and overhead.
Incident Cost Calculator
Calculate total incident cost from revenue impact and engineering response time.
Infrastructure ROI Calculator
Calculate infrastructure ROI as percentage of revenue and efficiency trend.
On-Call Cost Calculator
Calculate the true cost of on-call from pages, resolution time, and engineer burden.
Replatform Cost Estimator
Calculate replatform ROI, break-even timeline, and total migration cost.
SaaS License Optimizer
Calculate SaaS license utilization and savings from seat reduction or tier change.
Software Purchase Risk Calculator
Score SaaS purchase risk before committing budget.
Team Scaling Cost Model
Model the true cost of team growth including onboarding, communication overhead, and attrition risk.
Technical Debt Cost Estimator
Calculate monthly cost of technical debt from delivery slowdown and team rate.
Total Cost of Ownership Calculator
Model the real cost of any SaaS contract including hidden costs.

Data 11

Base64 Encoder / Decoder
Encode and decode Base64 with URL-safe variant support and JSON auto-detection.
Cron Expression Parser
Parse and explain cron expressions with next-run times — no server required.
CSV Dialect Validator
Validate CSV structure and detect delimiter, quoting, and encoding issues before loading.
Data Type Cross-Platform Reference
Map data types across PostgreSQL, BigQuery, Snowflake, Redshift, and Spark SQL.
dbt Model Name Checker
Validate dbt model names against naming conventions before adding to your project.
ISO 8601 Datetime Parser
Parse any ISO 8601 datetime, duration, or interval and see all components.
JSON Schema Validator
Validate JSON documents against Draft 7, 2019-09, and 2020-12 schemas — browser-only.
Regex Tester
Test patterns with real-time match highlighting and capture groups.
Semantic Version Comparator
Compare semantic versions and check range constraint satisfaction — browser-only.
SQL Formatter
Format SQL queries with dialect-aware indentation and keyword casing — browser-only.
Unix Timestamp Converter
Convert Unix timestamps to ISO 8601 and back — with timezone support.

Data Eng 13

CDC Reference
Reference guide to Change Data Capture — Debezium, Postgres logical replication, and replication lag.
Data Contract Reference
Reference guide to data contracts — schema, freshness SLOs, ODCS standard, and producer responsibility.
Data Freshness SLO Calculator
Calculate data freshness SLO compliance and budget remaining from pipeline lag.
Data Lineage Reference
Reference guide to data lineage — column-level lineage, dbt DAG, OpenLineage, and data catalogs.
Data Partitioning Strategy Reference
Reference guide to data partitioning — time partitioning, hive-style, clustering, and small file problem.
Data Pipeline SLA Calculator
Calculate pipeline SLA feasibility from upstream completion, processing time, and consumer deadlines.
Data Quality Score Calculator
Calculate composite data quality score from completeness, validity, uniqueness, and timeliness.
Data Warehouse Cost Calculator
Estimate monthly data warehouse costs across BigQuery, Snowflake, and Redshift.
Dataflow Worker Sizing Calculator
Size a stream-processing worker pool from events per second, average processing time, concurrency per worker, and hea...
ETL vs ELT Reference
Reference guide to ETL vs ELT architectures — dbt, reverse ETL, and transformation strategy.
Event Schema Validator
Validate event payload JSON against data engineering best practices — event_id, occurred_at, schema_version.
Schema Evolution Reference
Reference guide to schema evolution — Avro, Protobuf, backward/forward compatibility.
Streaming Latency Budget Calculator
Calculate end-to-end streaming pipeline latency from ingest through processing to sink.

Database 10

Index Selectivity Estimator
Estimate index selectivity and determine whether an index will benefit a query.
PostgreSQL Connection Pool Calculator
Calculate optimal PgBouncer pool size from max_connections, app servers, and query throughput.
PostgreSQL Data Type Reference
Reference guide to PostgreSQL data types — storage size, precision, and common pitfalls.
PostgreSQL Index Size Estimator
Estimate PostgreSQL B-tree, GIN, and BRIN index sizes before creation.
PostgreSQL Partition Strategy Calculator
Calculate optimal partition count and strategy from row count, retention, and write rate.
PostgreSQL Replication Lag Calculator
Convert PostgreSQL replication lag bytes to seconds and estimate failover RPO.
PostgreSQL VACUUM Threshold Calculator
Calculate autovacuum trigger threshold and dead tuple accumulation for PostgreSQL tables.
SQL Join Type Reference
Reference guide to SQL join types including LATERAL, anti-join, and semi-join patterns.
SQL Query Cost Estimator
Estimate PostgreSQL sequential vs index scan cost from table statistics.
Transaction Isolation Level Reference
Reference guide to PostgreSQL transaction isolation levels, anomalies, and locking patterns.

Devex 12

Code Review Cycle Time Calculator
Calculate code review cycle time metrics and DORA lead time contribution.
Cognitive Load Reference
Reference guide to cognitive load theory for software teams — intrinsic, extraneous, and germane load.
Context Switch Cost Calculator
Calculate daily productivity loss from context switching frequency.
Dev Environment Parity Checker
Assess local development environment parity with production across key dimensions.
Developer NPS Calculator
Calculate developer NPS from promoter and detractor percentages with benchmark comparison.
Developer Onboarding Time Calculator
Calculate onboarding cost and productivity loss from time-to-first-commit data.
Developer Survey Metric Reference
Reference guide to DX measurement frameworks — SPACE, DevEx dimensions, DORA, and developer NPS.
Documentation Coverage Checker
Assess documentation coverage across README, architecture, runbooks, and API docs.
DX Metric Baseline Calculator
Calculate DX metric baseline values with percentile guidance and improvement targets.
Inner Loop Time Calculator
Calculate daily time lost to slow inner development loop and annual engineering cost.
Local Dev Environment Reference
Reference guide to local development environment approaches — Docker Compose, cloud IDEs, and secrets management.
Meeting Overhead Calculator
Calculate total engineering meeting cost and deep work time available per week.

Finops 11

Cloud Data Transfer Cost Calculator
Calculate inter-AZ and inter-region data transfer costs — the hidden cloud bill item.
Cloud Egress Cost Calculator
Estimate monthly cloud egress cost and CDN offload across AWS, GCP, Azure, Cloudflare, and DigitalOcean.
Cloud Region Latency Reference
Typical inter-region latency and data transfer costs for common cloud architecture decisions.
Cloud Rightsizing Calculator
Calculate annual savings from rightsizing over-provisioned cloud instances.
Cloud Storage Cost Estimator
Estimate S3, GCS, Azure Blob, and DigitalOcean Spaces monthly costs including storage, requests, and retrieval.
Container Resource Cost Calculator
Calculate the true cost of Kubernetes resource requests and identify overprovision waste.
Cost Per Request Calculator
Calculate and compare cost per request across Lambda, EC2, and serverless platforms.
EC2 Cost Calculator
Estimate on-demand EC2 cost for the supported embedded instance list.
Reserved Instance Break-Even Calculator
Calculate the exact month when a reserved instance pays for itself versus staying on-demand.
Rightsizing Savings Calculator
Estimate realistic monthly savings from a rightsizing program. Inputs: current spend, average utilization, target uti...
Spot Instance Savings Estimator
Calculate effective spot instance savings accounting for interruption rate.

Frontend 10

Accessibility Color Contrast Checker
Calculate WCAG 2.1 color contrast ratio and check AA/AAA compliance.
Browser Compatibility Reference
Reference guide to Baseline features, browserslist, and progressive enhancement.
CDN Cache Hit Rate Calculator
Calculate CDN cache hit rate, origin offload, and cost savings from improving cache hit rate.
Core Web Vitals Reference
Reference guide to Core Web Vitals — LCP, INP, CLS thresholds and optimization.
CSS Specificity Calculator
Calculate CSS selector specificity as a 4-number tuple.
HTTP Cache-Control Header Generator
Generate Cache-Control headers for different resource types and caching strategies.
Image Optimization Calculator
Calculate bandwidth and LCP savings from image format conversion and compression.
JavaScript Bundle Size Calculator
Assess JS bundle size against performance budget and estimate parse time on mobile.
Service Worker Strategy Reference
Reference guide to service worker caching strategies — cache-first, network-first, stale-while-revalidate.
Web Performance Budget Calculator
Set and assess web performance budgets for JS, images, and Core Web Vitals targets.

Git 15

Changelog Format Validator
Validate CHANGELOG.md against Keep a Changelog 1.0 format.
Code Review Time Estimator
Estimate code review time from PR size, complexity, and reviewer familiarity.
Conventional Changelog Parser
Parse conventional commit messages into grouped changelog entries and next version.
Git Bisect Calculator
Calculate git bisect steps needed and time to find a regression in a commit range.
Git Blame Age Calculator
Calculate code age and knowledge concentration risk from git blame statistics.
Git Branch Naming Checker
Validate git branch names against naming conventions and forbidden character rules.
Git Commit Message Linter
Validate commit messages against Conventional Commits 1.0 and semantic release conventions.
Git Commit Message Validator
Validate commit messages against Conventional Commits 1.0 and semantic release conventions.
Git Merge Strategy Reference
Reference guide to git merge, squash, rebase, and fast-forward strategies.
Git Rebase vs Merge Reference
Reference guide to git rebase — interactive rebase, rebase --onto, and conflict resolution.
Git Tag Naming Validator
Validate git tag names against semver conventions and forbidden character rules.
PR Size Complexity Estimator
Estimate pull request review complexity and time from lines changed and file count.
Release Notes Format Checker
Validate release notes against Keep a Changelog 1.0 and GitHub Release formats.
Semantic Version Bumper
Calculate the next semantic version from current version and change type.
Trunk-Based Development Reference
Reference guide to trunk-based development — feature flags, release strategy, and DORA correlation.

Gitops 2

ArgoCD Health Reference
Reference guide to ArgoCD health statuses, custom health checks, and notification triggers.
GitOps Sync Status Reference
Reference guide to ArgoCD and Flux sync statuses, health conditions, and resolution paths.

Iac 9

Ansible Playbook Linter
Validate Ansible playbook YAML syntax and check for common anti-patterns.
Cloud Region Selector
Pick a region strategy from latency sensitivity, data residency, customer geography, and failover posture. Browser-on...
Config Drift Risk Calculator
Calculate config drift risk score from IaC-managed resource count and console access patterns.
IaC Drift Cost Estimator
Estimate the monthly cost of infrastructure drift from Terraform state.
Immutable Infrastructure Reference
Reference guide to immutable infrastructure patterns and implementation strategies.
Infrastructure Capacity Planning Calculator
Calculate required infrastructure capacity from current peak load, growth rate, and safety buffer.
Infrastructure Change Risk Calculator
Calculate infrastructure change risk score from resources added, modified, and destroyed.
Terraform Plan Cost Estimator
Estimate monthly cloud cost delta from a Terraform plan by resource type and count.
Terraform Workspace Reference
Reference guide to Terraform workspace patterns and state isolation strategies.

Kubernetes 13

Ingress Controller Selector
Pick a Kubernetes ingress strategy from cluster size, traffic shape, TLS policy, and multi-tenant needs. Browser-only...
Init Container Overhead Calculator
Calculate pod resource requests accounting for init container overhead and sequential startup.
Kubernetes API Deprecation Checker
Check whether a Kubernetes API version has been deprecated or removed in your cluster version.
Kubernetes DNS Name Validator
Generate valid Kubernetes service DNS names and validate cross-namespace resolution.
Kubernetes Label Selector Tester
Test Kubernetes label selectors against pod label sets to verify match behavior.
Kubernetes Manifest Linter
Check K8s manifests for missing resource limits, probes, and security issues.
Kubernetes NetworkPolicy Validator
Validate Kubernetes NetworkPolicy YAML structure and catch common configuration errors.
Kubernetes RBAC Policy Checker
Validate Kubernetes RBAC Role and ClusterRole YAML for wildcard escalation and least privilege.
Kubernetes Resource Quota Calculator
Calculate namespace resource usage and quota pressure from pod resource requests.
Kubernetes Resource Request Optimizer
Calculate right-sized CPU and memory requests from P99 observed usage with workload-appropriate headroom.
OOM Threshold & Memory Limit Calculator
Calculate safe Kubernetes memory limits and OOM kill thresholds from P99 observed usage.
Pod Security Admission Reference
Reference guide to Kubernetes Pod Security Admission profiles, restrictions, and PSP migration.
PodDisruptionBudget Feasibility Checker
Check whether a PodDisruptionBudget allows voluntary disruptions at your replica count.

Ml 11

Batch Size Memory Calculator
Calculate GPU memory for training from model size, precision, and optimizer.
Confusion Matrix Calculator
Calculate precision, recall, F1, and accuracy from TP/FP/TN/FN values.
Data Drift Threshold Calculator
Classify PSI drift severity and get monitoring action recommendations.
GPU Utilization Calculator
Diagnose GPU utilization and calculate monthly wasted cost from underutilization.
Learning Rate Scheduler Reference
Reference guide to LR schedulers — cosine, warmup, OneCycleLR, and LR finder.
LLM Token Count & Cost Estimator
Estimate token count and monthly LLM API cost from text length and request volume.
ML Experiment Tracking Reference
Reference guide to ML experiment tracking — MLflow, W&B, DVC, and model registry.
ML Pipeline Latency Budget Calculator
Calculate model inference budget from total latency target and pipeline overhead.
ML Training Cost Estimator
Estimate GPU training cost from GPU type, count, and training duration.
Model Versioning Reference
Reference guide to model versioning — shadow deployment, champion-challenger, model cards.
Precision-Recall-F1 Calculator
Calculate F1, F-beta, and averaging strategies from precision and recall.

Mobile 12

App Size Budget Calculator
Assess app install size against iOS cellular limit and Android bundle optimization.
App Store Metadata Validator
Validate iOS and Android app store metadata character limits and ASO best practices.
App Store Rating Reference
Reference guide to iOS and Android in-app rating prompt timing and ASO rating strategies.
Biometric Auth Reference
Reference guide to iOS LocalAuthentication and Android BiometricPrompt implementation.
Crash Rate Calculator
Calculate crash-free rate and assess against iOS and Android quality benchmarks.
Deep Link URI Validator
Validate mobile deep link URLs — URI schemes, Universal Links, and App Links.
Firebase Remote Config Reference
Reference guide to Firebase Remote Config fetch behavior, conditions, and A/B testing.
Mobile Accessibility Reference
Reference guide to iOS VoiceOver and Android TalkBack accessibility APIs and WCAG requirements.
Mobile API Versioning Reference
Reference guide to mobile API versioning — old app versions, forced upgrades, and sunset patterns.
Mobile Performance Budget Calculator
Assess mobile app performance against iOS and Android cold start and API latency budgets.
Mobile Release Checklist
Reference guide to iOS and Android release checklist — privacy manifest, staged rollout, and crash monitoring.
Push Notification Payload Calculator
Calculate push notification payload size and validate against APNs and FCM limits.

Network 10

Bandwidth-Delay Product Calculator
Calculate TCP bandwidth-delay product and required buffer sizes for high-throughput links.
BGP AS Path Reference
Reference guide to BGP AS path format, prepending, private ASNs, and path selection.
DNS Record Type Reference
Reference guide to DNS record types — A, AAAA, CNAME, MX, TXT, SRV, CAA, and NS.
DNS TTL Reference
Reference guide to DNS TTL recommendations by record type and use case.
Firewall Rule Analyzer
Analyze firewall rules for overly broad permissions, rule order issues, and implicit deny coverage.
IP Address Classifier
Classify any IPv4 or IPv6 address — private, public, special range, and CIDR host count.
IPv6 Address Calculator
Expand, classify, and calculate subnets for any IPv6 address or prefix.
MTU Path Discovery Reference
Reference guide to MTU, Path MTU Discovery, MSS clamping, and jumbo frame considerations.
Network Latency Budget Calculator
Decompose a latency budget across network hops, DNS, TLS, and application processing.
TCP Window Size Calculator
Calculate optimal TCP window size and maximum throughput from bandwidth and RTT.

Networking 1

CIDR Calculator
Calculate network address, host range, and broadcast for any CIDR block.

Observability 10

Alert Fatigue Calculator
Quantify on-call alert fatigue and identify actionable improvement levers.
Dashboard Query Cost Estimator
Estimate Grafana Cloud and Datadog query costs from dashboard panel count and refresh rate.
Distributed Trace Storage Calculator
Calculate distributed tracing storage costs from span rate, size, and sampling strategy.
Log Retention Sizing Calculator
Size log retention storage from daily ingest rate, retention days, replication factor, and index overhead. Browser-on...
Log Sampling Rate Calculator
Calculate the optimal log sampling rate to hit a cost target while preserving error signal.
Log Volume Cost Estimator
Estimate monthly log ingestion and retention costs across Datadog, New Relic, Grafana Cloud, and Better Stack.
Metrics Cardinality Estimator
Calculate time series cardinality from label dimensions before hitting Prometheus limits.
On-Call Rotation Calculator
Calculate per-engineer on-call burden, fairness score, and burnout risk from rotation parameters.
OpenTelemetry Attribute Reference
Search OpenTelemetry semantic convention attribute names for HTTP, database, messaging, and RPC spans.
PromQL Validator
Validate PromQL query syntax before hitting your Prometheus instance.

Platform 1

Kubernetes HPA Calculator
Compute the exact replica count your Kubernetes HPA controller will target.

Platform Eng 11

Developer Portal Checklist
Reference checklist for internal developer portal features — service catalog, templates, docs, observability.
Golden Path Reference
Reference guide to golden paths — paved road analogy, template components, and adoption metrics.
IDP Capability Reference
Reference guide to Internal Developer Portal capabilities — Backstage, service catalog, scaffolding.
Paved Road ROI Calculator
Calculate platform engineering ROI from team size, adoption, and developer time saved.
Platform Adoption Calculator
Calculate golden path adoption rate and migration progress across new and existing services.
Platform Self-Service Maturity Calculator
Assess platform self-service maturity from ticket ratio, automation coverage, and provisioning time.
Platform SLO Calculator
Calculate internal platform service SLO compliance and developer impact from downtime.
Platform Team Size Calculator
Calculate recommended platform team size from engineering headcount and platform scope.
Platform Team Topology Reference
Reference guide to Team Topologies for platform teams — stream-aligned, platform, enabling teams.
Service Catalog Reference
Reference guide to service catalog implementation — catalog-info.yaml, entity types, ownership, and automation.
Toil Automation Priority Calculator
Calculate platform team toil cost and automation ROI to prioritize automation investments.

Quality 6

Code Churn Impact Estimator
Estimate defect risk from code churn rate in your codebase.
Cognitive Complexity Reference
Reference guide to SonarSource cognitive complexity rules, nesting increments, and thresholds.
Cyclomatic Complexity Calculator
Calculate cyclomatic complexity from decision points and get branch coverage requirements.
Dependency Freshness Calculator
Calculate libyear debt and update priority from dependency age and version lag.
Technical Debt Calculator
Estimate technical debt remediation time and cost using the SQALE method.
Test Coverage Threshold Calculator
Calculate current test coverage and the lines needed to reach a coverage target.

Reliability 2

API Rate Limit Calculator
Check API rate limit utilization and remaining buffer before your pipeline hits 429.
SLO Burn Rate Calculator
Calculate error budget burn rate and SLO violation risk.

Secops 11

Attack Surface Calculator
Calculate external attack surface score from internet-facing services, open ports, and unprotected accounts.
CVSS Prioritization Calculator
Prioritize vulnerabilities from CVSS score, EPSS probability, and contextual factors.
Detection Coverage Reference
Reference guide to MITRE ATT&CK detection coverage — Navigator, gaps, and D3FEND.
Mean Time to Detect Calculator
Calculate MTTD and dwell time metrics from security event detection data.
Security Alert Threshold Calculator
Calculate SOC analyst alert load and assess false positive rate against alert fatigue thresholds.
Security Incident Severity Classifier
Classify security incident severity from breach indicators and determine response SLA.
Security Log Retention Cost Calculator
Calculate security log storage cost from daily volume and retention tiers.
SIEM Query Reference
Reference guide to SIEM query languages — Splunk SPL, Elastic EQL, Sentinel KQL, and Sigma rules.
Threat Intelligence Reference
Reference guide to threat intelligence types — MITRE ATT&CK, IOCs, TLP, and threat actor attribution.
Vulnerability SLA Compliance Calculator
Calculate vulnerability remediation SLA compliance rate by severity tier.
Zero Trust Maturity Reference
Reference guide to Zero Trust architecture — CISA maturity model, identity, device, and network pillars.

Security 23

Content Security Policy Validator
Validate and explain Content-Security-Policy header directives and security implications.
Cryptographic Hash Reference
Reference guide to cryptographic hash functions — security status, use cases, and algorithm selection.
CVSS Calculator
Decode any CVSS 3.x vector string into a full severity breakdown.
Dependency CVE Scanner
Check npm and pip packages against known critical CVEs.
Dependency Vulnerability Age Calculator
Calculate exposure window from CVE publication date to patch application.
Feature Flag Strategy Selector
Pick a feature flag strategy from blast radius, rollback urgency, audit requirement, and dependency complexity. Brows...
JWT Security Checker
Decode and check a JWT for security vulnerabilities — algorithm none, expired, and missing validation.
MITRE ATT&CK ID Checker
Validate ATT&CK technique IDs and look up tactic categories.
npm Package Name Validator
Validate an npm package name against the full npm naming rules before publishing.
OAuth 2.0 Flow Reference
Reference guide to OAuth 2.0 grant types — Authorization Code, PKCE, Client Credentials, and security considerations.
OWASP Top 10 Reference
Searchable reference for OWASP Top 10 2021 — attack types, examples, and mitigations.
Password Entropy Calculator
Calculate password entropy and estimated crack time for different storage hash types.
PKCE Generator
Generate RFC 7636-compliant PKCE code_verifier and code_challenge pairs in your browser.
PyPI Package Name Validator
Validate a PyPI package name against PEP 508 and compute its PEP 503 normalized form.
Secrets Exposure Risk Calculator
Quantify credential exposure risk from secret count, rotation age, and access breadth. Browser-only — inputs never le...
Secrets Leak Scanner
Detect exposed credentials before they reach your repo.
Secrets Storage Selector
Pick the right secret storage backend from sensitivity level, access pattern, compliance regime, and rotation cadence...
Security Header Checker
Validate HTTP security response headers — HSTS, CSP, X-Frame-Options, COOP, and more.
Session Token Entropy Calculator
Calculate entropy of session tokens and verify compliance with OWASP minimum recommendations.
SPDX License Reference
Search all SPDX license identifiers with OSI and FSF approval status.
SQL Injection Pattern Reference
Reference guide to SQL injection techniques, blind injection, and parameterized query defenses.
Threat Model Calculator
Calculate STRIDE threat categories and OWASP risk ratings for a system component.
TLS Configuration Reference
Reference guide to TLS versions, cipher suites, PFS, certificates, and HSTS configuration.

Sre 17

Apdex Score Calculator
Calculate Apdex from request counts and get an instant SLO health rating.
Capacity Alert Threshold Calculator
Calculate safe alert thresholds for CPU, memory, disk, and queue depth resources.
Change Failure Rate Calculator
Calculate DORA change failure rate tier from deployment and failure counts.
Chaos Engineering Blast Radius Estimator
Estimate the blast radius of a chaos experiment from traffic percentage and dependency fan-out.
Dependency Reliability Calculator
Calculate composite system availability from dependency availability percentages.
Incident Frequency Benchmark
Place your team's incidents-per-engineer rate on the Pagerduty State of Digital Operations distribution. Inputs: mont...
Incident Timeline Analyzer
Calculate MTTD, MTTR, MTTM from incident event timestamps.
Load Shedding Threshold Calculator
Calculate load shedding threshold, current headroom, and 503 budget from service capacity.
MTTR Calculator (SRE)
Calculate MTTR, MTTD, MTTF, and availability estimate from your incident log.
On-Call Fairness Calculator
Measure on-call shift distribution equity across your SRE team with Gini coefficient scoring.
Percentile Calculator (SRE)
Compute P50, P95, P99, and P99.9 latency percentiles from a raw sample set.
Postmortem Quality Checker
Check postmortem documents for blameless language, actionable items, and five-whys depth.
Retry Storm Impact Calculator
Compute retry amplification factor and effective load from baseline rate, retry count, backoff model, and failure con...
Runbook Format Checker
Check runbook content for completeness, actionability, and on-call usability.
SLI Definition Reference
Reference guide to SLI types — request success rate, latency, availability, and data freshness.
SLO Target Benchmark
Place an availability SLO target against published SaaS and infrastructure benchmark bands by customer impact and ser...
Toil Calculator
Calculate weekly toil hours, annual cost, and automation ROI for SRE toil reduction.

Testing 11

Accessibility Testing Reference
Reference guide to automated and manual accessibility testing — axe-core, screen readers, and keyboard testing.
Flaky Test Root Cause Reference
Reference guide to flaky test root causes — timing, shared state, network calls, and random data.
Mutation Score Reference
Reference guide to mutation testing — Stryker, PITest, mutation score, and equivalent mutants.
Performance Test Load Calculator
Calculate virtual user count and load test parameters from target RPS and response time.
Property-Based Testing Reference
Reference guide to property-based testing — Hypothesis, fast-check, shrinking, and property types.
Test Coverage ROI Calculator
Calculate the engineering effort needed to reach a coverage target and expected defect reduction.
Test Data Reference
Reference guide to test data patterns — factories, Faker, database seeding, and test isolation.
Test Name Validator
Validate test names against Given-When-Then, Should, and three-part naming conventions.
Test Pyramid Calculator
Analyze test suite composition against the ideal unit/integration/E2E pyramid ratio.
Test Suite Health Calculator
Score overall test suite health from flakiness, speed, coverage, and maintenance burden.
Visual Regression Testing Reference
Reference guide to visual regression testing — Playwright, Percy, Chromatic, and baseline management.
Canonical URL Auditor
Compare a page URL with its rendered canonical tag. This inline utility runs locally and flags missing, relative, self-referencing, cross-origin, and mismatched canonicals.
Enter both values to run the audit.