Base64 encoder and decoder
Encode text to Base64 or decode it back.
URL encoder and decoder
Percent-encode text for use in a URL, or decode %20 style text back to readable form.
Your files stay on your device
How it works
- 1Choose Encode or Decode.
- 2Paste your text or URL.
- 3For encoding, choose whether the text is a single value or a whole URL.
- 4Copy the result.
What the options do
- A value (encodeURIComponent)
- Encodes everything except letters, digits and - _ . ! ~ * ' ( ). Use for a query parameter value or a path segment.
- A whole URL (encodeURI)
- Keeps characters that structure a URL such as : / ? # & =, and encodes the rest. Use for a full address.
- Treat + as a space
- Form submissions write spaces as +. Turn this on to decode them.
Privacy
This tool runs in your browser. Your files are never uploaded to a server.
Questions people ask
When do I encode a value, and when a whole URL?
Encode each parameter value on its own, then join them with & and =. If you encode a complete URL as a value, its slashes and question marks are escaped and the link breaks.
Why does decoding fail?
A % sign must be followed by two hex digits, and the resulting bytes must form valid UTF-8. A stray % in text, such as 50% off, causes this. Encode it as %25.
What is the difference between %20 and +?
%20 is a space in any part of a URL. + means a space only in form-encoded query strings, which is why it has its own option.
How are non-English characters encoded?
As UTF-8 bytes, each written as %XX. For example the letter é becomes %C3%A9.
Does the tool follow or open the link?
No. It only changes text. Nothing is requested from the address.