Local developer utility

HTTP Response Header Analyzer

Analyze pasted HTTP response headers for common security and cache settings. Does not fetch URLs. Your input stays in your browser while you work.

HTTP Header Analyzer🔒 Processed locally

How to use HTTP Header Analyzer

Complete the labeled fields above, choose an action, and inspect the result before copying or downloading it.

Processing runs locally in this browser. No input is uploaded or sent to a conversion service.

chmod Calculator — Choose owner, group, and other permissions and generate octal and symbolic modes.
chmod to English — Explain three-digit octal file permissions.
.env Validator — Check simple KEY=value lines and report duplicate keys. No interpolation or shell execution.
.env Diff — Compare parsed .env key/value pairs without sending secrets anywhere.