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Free Browser-Based Developer Tools
Privacy-first tools that run entirely in your browser. No uploads, no tracking, no signup required.
Most Popular Tools
Our most-used privacy-first developer tools
PHP Version Checker
Check which PHP version a website runs, whether a PHP version is still supported and when it reaches end of life, or the minimum PHP version your code needs.
JWT Decoder
Decode and inspect JWT tokens and bearer tokens online. View header, payload, signature, and expiration status.
GZIP Compress/Decompress
Compress and decompress GZIP files online
PHP2Shell Checker
Check whether a website or PHP version is affected by PHP2Shell (CVE-2026-109618 and CVE-2026-109619), the critical PHP remote code execution flaws patched on 21 October 2026.
Gemini Watermark Remover
Remove watermarks and logos from Google Gemini AI-generated images online for free.
HTML Live Preview
Real-time HTML code renderer with instant visual preview
Formatters
Encoders & Decoders
Generators
Text Tools
JSON Diff Checker
Compare two JSON objects and visualize differences. Semantic JSON comparison.
PHP Version Checker
Check which PHP version a website runs, whether a PHP version is still supported and when it reaches end of life, or the minimum PHP version your code needs.
PHP2Shell Checker
Check whether a website or PHP version is affected by PHP2Shell (CVE-2026-109618 and CVE-2026-109619), the critical PHP remote code execution flaws patched on 21 October 2026.