Build query parameters
Encode spaces and reserved characters before placing user text inside a URL component.
About URL Encode / Decode
URL Encode / Decode converts special characters to percent-encoded URL component form and reverses that encoding.
Common use cases
Inspect encoded links
Decode percent-encoded values from logs, redirects or copied query strings.
Debug API requests
Check whether special characters were encoded once, twice or not at all.
How it works
1
Encode mode converts characters that are not safe in a URL component into percent-encoded bytes.
2
Decode mode reverses percent escapes back into readable characters.
3
The transformation is applied to the text you provide without making a network request.
Privacy & file handling
URL encoding stays in the browser
Input text is encoded or decoded locally; Zavilo does not need to send it to a server for this utility.
Limitations and important notes
- Encoding an entire URL and encoding only a query parameter are different operations; choose the correct scope.
- Double-encoding can turn an existing percent sign into %25 and make values harder to interpret.
- Malformed percent sequences may fail to decode.
URL encoding vs Base64
| Feature | Designed for | Readable by browsers as URL syntax |
|---|---|---|
| URL encoding | Escaping URL components | Yes |
| Base64 | Representing arbitrary bytes as text | No; it is a separate encoding format |
How to use URL Encode / Decode
- 1
Paste the value you want to process.
- 2
Choose Encode or Decode.
- 3
Copy the result.
Tips for better results
- Use this for URL parameters and component values.
- Malformed percent encoding will produce an error.
Frequently asked questions
Does this encode a full URL?
It uses URL component encoding, which is best for parameters and individual URL values.