Free Online Developer Tools
Simple, fast, and secure tools for encoding, decoding, and formatting. All processing happens in your browser.
Tools
Base64 Encoder
Encode text or data to Base64 format. Perfect for encoding binary data for web transmission.
Base64 Decoder
Decode Base64 encoded strings back to original text or data.
URL Encoder
Encode text for safe use in URLs. Converts special characters to percent-encoded format.
URL Decoder
Decode URL encoded strings back to readable text.
HTML Entity Encoder
Convert special characters to HTML entities for safe display in HTML.
HTML Entity Decoder
Decode HTML entities back to their original characters.
JSON Formatter
Format and validate JSON data. Beautify or minify JSON strings.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, and signature.