Escape Encode

Percent-encode and percent-decode text using the browser's native encodeURIComponent and decodeURIComponent functions. Useful for preparing query-string values, JSON content embedded in URLs, or any text that contains characters not legal inside a URL. A simple mode selector switches between encoding and decoding.

1. Choose Encode or Decode from the mode dropdown.\n2. Paste the input text into the textarea.\n3. Click the Encode or Decode button.\n4. Copy the result using the Copy link beneath the output area.

Encode passes the input verbatim to encodeURIComponent, so every character except A–Z, a–z, 0–9 and - _ . ! ~ * ' ( ) becomes a percent-escaped UTF-8 byte sequence. Decode passes the input to decodeURIComponent, which throws on malformed sequences such as a lone % or %zz; in that case the output area simply stays empty and no result is produced.