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Showing 11 tools in developer
JSON Formatter & Validator
Format, validate, and minify JSON instantly in your browser.
Strong Password Generator
Generate cryptographically secure passwords instantly.
Base64 Encoder / Decoder
Encode and decode Base64 strings instantly in your browser.
JWT Decoder
Decode and inspect JSON Web Token header, payload, and signature.
Regex Tester
Test regular expressions against strings with live match highlighting.
Cron Expression Builder
Build cron schedules visually and get the expression + plain-English explanation.
.env File Generator
Generate a boilerplate .env file for Laravel, Next.js, Node.js, or Docker.
SQL Formatter
Format and beautify SQL queries with consistent indentation and keyword casing.
Color Contrast Checker (WCAG)
Check foreground/background color contrast for WCAG AA and AAA compliance.
.htaccess Generator
Generate Apache .htaccess rules for redirects, HTTPS, caching, and security headers.
AI Token Cost Calculator
Calculate API costs for GPT-4o, Claude, Gemini, and other LLMs by token count.