URL Encoder and Decoder
Percent-encode text for URLs, or decode an encoded URL back to readable text.
How to use this tool
- Select your file, drag it onto the box above.
- Processing starts automatically — there is nothing to configure.
- Check the result panel, which shows the original size, the final size and the page count.
- Click Download to save it.
Two modes matter. Component encoding escapes everything including / ? & = #, which is right for a value going into a query string. Full URL encoding preserves those structural characters, which is right when encoding a whole address.
The specification
| Component mode | encodeURIComponent — escapes / ? & = # too |
|---|---|
| Full URL mode | encodeURI — preserves URL structure |
| Direction | Encode or decode |
| Spaces | Become %20 |
How it works
This tool runs entirely in your browser. There is no server involved, which means nothing you type or upload is transmitted, stored, or logged — and there are no usage limits, because there is nothing for us to ration.
You can confirm it yourself: open your browser's developer tools, select the Network tab, and use the tool. No request is made.
Who uses this
Building query strings safely, debugging tracking links, and decoding a URL someone has sent you as an unreadable string of percent codes.
Frequently asked questions
Which mode should I use?
Component mode for a single value going into a parameter — a search term or a redirect target. Full URL mode when encoding an entire address, since it leaves the structural characters intact.
Why did my URL break?
Usually a value containing & or = was inserted into a query string without component encoding, so it was read as a parameter separator. Encoding the value first fixes it.
Is it %20 or + for a space?
%20 is correct everywhere. The + convention applies only inside form-encoded query strings and is not valid in a path.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device. Your file is never transmitted and never stored by us. You can confirm this by opening your browser’s Network tab while you use the tool — you will see no upload request.
Is there a limit on how many files I can process?
No. There is no daily cap, no account, and no watermark. Because the work happens on your device rather than our servers, there is nothing for us to ration.
Is this tool really free?
Yes — no account, no trial, no watermark, and no cap on usage. It runs on your own device rather than our servers, so there is no cost for us to pass on.
Does it work on mobile?
Yes. The interface adapts to phone and tablet screens, and everything runs in the browser, so there is no app to install.
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Your files stay on your device. This tool runs entirely in your browser. No file is uploaded, transmitted, or stored. You can verify this by opening your browser's Network tab while using the tool.
Disclaimer. Specifications published by exam boards, governments and platforms change without notice. We verify and date every specification on this site, but you should always confirm against the official source before submitting an application. See our full disclaimer.