Which encoding does it use?

Percent-encoding via encodeURIComponent — safe for query-string values and path segments.

Does it encode spaces as + or %20?

%20. The decoder accepts + as a space too, since query strings in the wild use both.

encoders · free tool

Percent-encode text for URLs and query strings.

Runs in your browser — your data never leaves it

Input

Paste, type, or drop a file. Runs as you type.

Output

Output appears here as you type.

Input

a b&c

Output

a%20b%26c

This example is one of URL Encode's test cases — if the tool stopped producing this output, the build would fail.

Which encoding does it use?: Percent-encoding via encodeURIComponent — safe for query-string values and path segments.
Does it encode spaces as + or %20?: %20. The decoder accepts + as a space too, since query strings in the wild use both.

Encode text to Base64 — payloads, certificates, attachments.

Decode Base64 back to text, UTF-8 safe.

Decode percent-encoded URL text back to readable form.

Read a JWT's header and claims — it never leaves your browser, and we never verify the signature.