Are my caching rules logged to an external API?

No! All header compilation executes 100% locally in your browser.

Web Developer Tools

Cache-Control Header Generator

Generate Cache-Control headers (max-age, no-cache, no-store, immutable).

Developer & Code Suite

Syntax Checker & Code Validator

CODE SNIPPET INPUT

SYNTAX VALIDATION STATUS

✅ Valid JavaScript syntax! Zero syntax errors.

About Cache-Control Header Generator

The HTTP `Cache-Control` Header Studio & CDN Caching Rule Builder constructs RFC 9111 HTTP caching directives (`max-age`, `s-maxage`, `stale-while-revalidate`, `immutable`, `no-cache`, `no-store`, `public`, `private`) for web servers, Cloudflare, Fastly, and Next.js APIs.

Step-by-Step Guide

How to Use Cache-Control Header Generator

Step 1

Choose a caching scenario preset or customize individual directives.

Step 2

Set expiration times in seconds, hours, or days.

Step 3

Review the generated `Cache-Control` header and server configuration snippets.

Step 4

Click "Copy Header".

Industry Scenarios

Practical Use Cases for Cache-Control Header Generator

Configuring Immutable Static Asset Caching

Generate `public, max-age=31536000, immutable` headers for hashed JavaScript and CSS bundles to maximize browser cache hits and eliminate redundant bandwidth.

Configuring Stale-While-Revalidate for Edge CDNs

Construct `s-maxage=60, stale-while-revalidate=86400` caching rules for Cloudflare, Vercel, and CloudFront edge caches.

Sample Data & Transformation

Input & Output Examples

Generating Static Asset Cache Header

Input Sample:

Scope: Public, Max-Age: 1 Year (31536000s), Immutable: true

Processed Result:

`Cache-Control: public, max-age=31536000, immutable`

Technical Capabilities

Key Features & Performance

✓Directives: `max-age`, `s-maxage`, `stale-while-revalidate`, `stale-if-error`, `public`, `private`, `no-cache`, `no-store`, `must-revalidate`, `immutable`.
✓Presets: Immutable Static Assets, Dynamic API (SWR), Private User Data, Zero Cache (No-Store).
✓Generates Nginx `add_header`, Apache `.htaccess`, Next.js `headers()`, and Cloudflare Worker rules.
✓100% Client-Side memory execution.
✓1-Click Copy header and server config.

Technical Glossary

Key Terminology & Definitions

`stale-while-revalidate`

An HTTP Cache-Control directive allowing caches to serve cached stale content immediately while asynchronously revalidating in the background.

`immutable` Directive

Indicates to client browsers that the response body will never change over time, preventing conditional `If-None-Match` revalidation requests.

Frequently Asked Questions (PAA)

Cache-Control Header Generator FAQs

`no-cache` allows caching but requires revalidation with the server before use; `no-store` forbids the browser or CDNs from saving any copy to disk or memory.