Local developer utility

.env Validator

Check simple KEY=value lines and report duplicate keys. No interpolation or shell execution. Your input stays in your browser while you work.

.env Validator🔒 Processed locally

How to use .env Validator

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 Diff — Compare parsed .env key/value pairs without sending secrets anywhere.
npm Package Name Validator — Check lowercase package names and optional scopes for common npm naming constraints.