Encoding & decoding

Encode and decode Base64, URL encoding, hex, HTML entities, JSON strings, JWT and query strings — free, instant and 100% local.

• Text to Base64 Encoder — Free Online Tool Encode text to Base64 instantly in your browser. Free, private and offline-friendly: nothing is uploaded and your data stays on your device.
• Base64 to Text Decoder — Free Online Tool Decode Base64 to plain text instantly in your browser. Free, private and offline-friendly: nothing is uploaded, your data stays local.
• Text to URL-encoded Converter — Free Online Tool URL-encode text with encodeURIComponent instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
• URL-encoded to Text Decoder — Free Online Tool Decode URL-encoded text with decodeURIComponent in your browser. Free, private and offline-friendly: your data never leaves your device.
• Text to Hex Converter — Encode Strings as Hexadecimal Convert any text to space-separated hexadecimal bytes (UTF-8) instantly in your browser. Free and private: your data never leaves your device.
• Hex to Text Converter — Decode Hexadecimal Online Decode hexadecimal bytes back to readable text (UTF-8) instantly in your browser. Free, private and offline-friendly: nothing leaves your device.
• HTML Entities Encoder — Escape Text for HTML Online Escape text for safe HTML embedding: &, <, >, quotes and non-ASCII become entities. Free, private, in your browser — nothing leaves your device.
• HTML Entities Decoder — Unescape HTML Text Online Decode HTML entities like &amp;, &eacute; and &#233; back to plain text, in your browser. Free, private and offline-friendly: nothing is uploaded.
• JSON String Escaper — Escape Text for JSON Online Escape any text into a valid JSON string literal — quotes, newlines and tabs handled. Free and private, in your browser: nothing leaves your device.
• JSON String Unescaper — Decode Escaped Text Online Turn an escaped JSON string literal back into readable text — \n, \t, \uXXXX and quotes decoded. Free and private, right in your browser.
• JWT to JSON Decoder — Free Online Tool Decode a JWT header and payload to JSON instantly in your browser. Free and private: the token is never sent and stays on your device.
• Query String to JSON Converter — Free Online Tool Convert a URL query string into JSON instantly in your browser. Free, private and offline-friendly: your data never leaves your device.
• JSON to Query String Converter — Free Online Tool Convert a flat JSON object into a URL query string in your browser. Free, private and offline-friendly: your data never leaves your device.