Developer Tools
Tools for developers and programmers. Everything runs locally in your browser — no uploads, no signup.
8 tools
All developer tools tools
JSON Formatter
Format, beautify and minify JSON with clear, line-aware error messages.
Developer ToolsJSON Validator
Validate JSON instantly and see exactly where the syntax error is.
Developer ToolsBase64 Encoder & Decoder
Encode text to Base64 or decode Base64 to text, with full Unicode support.
Developer ToolsURL Encoder & Decoder
Percent-encode URLs and text or decode them back to readable form.
Developer ToolsUUID Generator
Generate cryptographically secure UUID v4 identifiers, one or in bulk.
Developer ToolsPassword Generator
Create strong random passwords locally with a live strength meter.
Developer ToolsJWT Decoder
Decode JWT header and payload, check expiry and verify HMAC signatures locally.
Developer ToolsQR Code Generator
Generate custom QR codes with error correction, sizing, colors and PNG/SVG export.
Developer Tools