Is URL Encoder & Decoder free to use?

Yes. URL Encoder & Decoder is free, has no usage cap and does not require an account. There is no paid tier that unlocks extra output.

Does my data get uploaded to a server?

No. The tool is a JavaScript function that runs inside your browser tab. Nothing you paste or drop in is transmitted, logged or stored by us.

Do I need to create an account?

No account, no email address and no sign-in. Open the page and start working.

Does it work on a phone or tablet?

Yes. The interface is responsive and works in mobile Chrome, Safari, Edge, Firefox and Samsung Internet. You can also install Toolspea as an app from the browser menu.

Can I use the output commercially?

Yes. You keep every right you already had over the input, and we claim nothing over the output.

What is the difference between encodeURI and encodeURIComponent?

encodeURI preserves characters with structural meaning (: / ? & =) so a complete URL stays usable. encodeURIComponent escapes them too, which is what you want for a single parameter value. The component switch chooses between them.

Why does a space become %20 sometimes and + other times?

Percent-encoding uses %20. The + form comes from the older application/x-www-form-urlencoded format used by HTML form submissions. Both appear in the wild; %20 is safe everywhere in a path or query.

What is double encoding?

Encoding an already-encoded value, so % becomes %25. It usually means two systems both escaped the string. Decode twice to recover the original.

Developer tools

URL Encoder & Decoder

Percent-encode query values or decode an escaped URL.

URL or parameter value

Result

Options

Direction

Encode as component (escapes & = ? /)

Everything above is processed in this browser tab. Your input is never sent to a server.

What is URL Encoder & Decoder?

URL Encoder & Decoder converts characters that are unsafe in a URL into percent-encoded escapes, and reverses the process. It is used when building query strings by hand, debugging redirect chains that contain nested URLs, and reading tracking parameters that have been double-encoded.

How to use it

1Paste the URL or the single parameter value.
2Pick encode or decode.
3Use component mode for a value that sits inside a query string; turn it off to encode a whole URL.
4Copy the result.

Features

Component and full-URL encoding modes
Round-trip safe for spaces, ampersands, plus signs and Unicode
Decodes repeatedly-encoded values one layer at a time so you can see each step

When people use it

Debugging redirects

OAuth and analytics redirects embed a return URL as a parameter. Decoding shows where a user actually lands.

Building UTM links by hand

Campaign names with spaces or ampersands break tracking unless they are encoded. Encode the value, not the whole URL.