Frontend Engineering Tools
HTTP Cache-Control Header Generator
Select resource type to generate the correct Cache-Control directive string with ETag and Vary header recommendations.
No data is transmitted — everything runs locallyTool
Example — Static assets cached for one day with immutable enabled as a standard CDN baseline.
Cache-Control
public, max-age=86400, immutable
versioned assets — never revalidate
Max-age
1.0 days
86400 seconds
CDN cacheable
Yes
Stale-While-Revalidate
8640s
optional SWR value
About this tool
HTTP Cache-Control Header Generator
The HTTP Cache-Control Header Generator produces correct Cache-Control directives for static assets, HTML, API responses, and fonts with ETag and Vary guidance.
• Generate Cache-Control header for hashed static assets
• Get correct Cache-Control for HTML documents that reference versioned assets
• Generate API response caching headers with appropriate privacy settings
• Get immutable asset headers for a CDN configuration
Affiliate disclosure
Developer-friendly cloud infrastructure. DigitalOcean provides cloud compute, networking, and managed databases with predictable pricing.
View with CDN options on DigitalOcean
External site · Independent provider · We may receive a commission · Not a recommendation
FAQ
What does this tool tell you?
The HTTP Cache-Control Header Generator produces correct Cache-Control directives for static assets, HTML, API responses, and fonts with ETag and Vary guidance.
What affects the result most?
Cache-Control directives: max-age, s-maxage, no-cache, no-store, must-revalidate, public, private. Immutable assets: Cache-Control: public, max-age=31536000, immutable — hash in filename enables long cache. HTML documents: Cache-Control: no-cache — force revalidation to pick up new asset hashes.
How should I use the result?
The calculation is deterministic — the same inputs always produce the same output — so the most useful workflow is to vary one input at a time and see which factor moves the result most. That tells you where to focus your attention before committing to a decision.
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