⚡
Cache Header Playground
Learn HTTP caching visually
🔗 Share
▶ Simulate
🔬 Simulator
📖 Tutorial
📋 Reference
🎯 Quick Scenarios
📤 Cache-Control Directives
🔖 Validation Headers
ETag
ETag Value
Last-Modified
Last-Modified Value
⚙ Request Simulation
Request Scenario
Fresh page load (no prior cache)
Cached resource (within max-age)
Stale resource (beyond max-age)
Force reload (Ctrl+Shift+R)
Conditional GET (If-None-Match)
Age of Cached Response (seconds)
Generated HTTP Response Headers
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🔬 Browser Simulation
Configure headers on the left and click
▶ Simulate
.