URL Encode / Decode

What is URL Encode / Decode?

URL Encode / Decode is a free online URL encoder, decoder, and query-string editor. In Text mode it percent-encodes or decodes a single value using Component (encodeURIComponent), Whole URI (encodeURI), or Form (application/x-www-form-urlencoded, spaces as +) scope. Query mode parses a URL or bare query string into an editable key/value table built with URLSearchParams, letting you add, edit, and remove rows before it rebuilds a normalized URL. Batch mode encodes or decodes a list line by line, and the output view highlights exactly which characters were percent-encoded. Developers, QA testers, and API users rely on it to escape parameter values, clean up messy query strings, and round-trip %20 / %3A / %2F strings.

How to use URL Encode / Decode

1. Pick a mode: Text for a single value, Query to edit a URL’s parameters, or Batch for a list.
2. In Text or Batch mode choose Encode or Decode and a scope — Component, Whole URI, or Form (spaces as +).
3. Paste your text, URL, or list into the input; the result updates live in the output below.
4. In Query mode edit the key/value table — change a key or value, Add a row, or remove one — and the URL is reassembled automatically.
5. Read the highlighted output to see which characters were percent-encoded, then copy the result or use Swap to round-trip in Text/Batch mode.

Examples

hello world & more

hello+world+%26+more

https://x.com/s?q=cat dog&page=2

https://x.com/s?q=cat+dog&page=2

a%20b
c%2Fd

a b
c/d

Frequently asked questions

What does Query mode do?

Query mode splits a URL at the first ? into a base and an editable key/value table built with URLSearchParams. Change any key or value, add rows, or delete them, and the tool rebuilds a normalized URL below (spaces become +). Pasting a bare query string like a=1&b=2 works too.

What is Form (application/x-www-form-urlencoded) scope?

Form scope encodes spaces as + instead of %20 and percent-encodes the same characters a browser uses when submitting an HTML form or building a URLSearchParams string — use it for form bodies and query values. Component and Whole URI use standard percent-encoding (%20 for a space).

How does Batch mode handle a list?

Batch mode encodes or decodes each line independently and keeps blank lines. If a line cannot be decoded (a malformed % sequence), it is left unchanged and the tool reports how many lines failed, so one bad line never breaks the rest.

What do the highlighted characters mean?

The output preview highlights every percent-encoded sequence (%XX), plus the + that stands for an encoded space in Form and Query modes, so you can see at a glance exactly what changed.

Is my data uploaded to a server?

No. All encoding, decoding, and query editing runs entirely in your browser with the built-in JavaScript URL functions. Nothing is uploaded, stored, or sent anywhere, so it is safe for private URLs, tokens, and internal links.