URL Encode / Decode

Percent-encode URLs and query strings for safe web transmission or decode percent-encoded URL parameters.

How to use this calculator

1. Select encode or decode.
2. Paste URL.
3. Read output.

Formula & method

RFC 3986 Percent-Encoding

Reserved Char → % + Hex Code

URI encoding standard.

Example

hello world -> hello%20world.

Key insights

• Spaces encode as %20 or +.

How to interpret your result

URL Encoded Output

Percent-encoded URL string.

Frequently asked questions

Why encode?

To handle reserved characters safely in URLs.

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