URL Encoder & Decoder Online
Encode text for URI components (query strings, etc.) or decode encoded URI components instantly. All processing happens in your browser — your data never leaves your device.
Text to encode
Why Use Our URL Encoder & Decoder?
Encode and decode entirely in your browser. Your data never leaves your device or gets sent to any server.
Encode or decode in milliseconds. No uploads, no waiting — just paste and transform.
Switch between encode and decode with one click. Use Swap to quickly flip input and output.
Uses JavaScript's built-in encodeURIComponent and decodeURIComponent — the same functions used in browsers and Node.js.
Use on any device — desktop, tablet, or phone. No app to install; your browser is enough.
No sign-up, no limits, no ads. Encode and decode URI components as often as you need, completely free.
How to Encode or Decode URLs
Three simple steps
- 1Choose Encode or Decode
Click Encode to convert text for use in URI components (e.g. query parameters), or Decode to convert an encoded string back to plain text.
- 2Enter Your Input
Paste or type your text (for encoding) or encoded URI component (for decoding) into the input area.
- 3Copy or Swap
Click Encode or Decode. Copy the result to your clipboard, or use Swap to move the output into the input and switch modes.
Frequently Asked Questions
Is it really free to use?
Yes. Our URL Encoder & Decoder tool is completely free. No registration, no limits, and no hidden fees.
Is my data secure?
Yes. All encoding and decoding runs in your browser. Your data never leaves your device or is sent to any server.
When should I use encodeURIComponent?
Use encodeURIComponent when encoding values for query parameters, path segments, or other URI components. It encodes all characters except: A-Z a-z 0-9 - _ . ! ~ * ' ( ). encodeURIComponent is stricter than encodeURI and is the right choice for query parameter values.
Why does decoding sometimes fail?
decodeURIComponent throws if the string contains a malformed escape sequence (e.g. a lone % or an incomplete %XX). Ensure the input was properly encoded with encodeURIComponent or a compatible scheme.