URL Encoder / Decoder

Percent-encode special characters into safe web formats, or decode parameter query strings back to human-readable text.

Why are URLs Encoded?

URLs can only contain a specific set of safe characters from the RFC 3986 specification. Any characters outside this set (like spaces, non-ASCII symbols, brackets, or ampersands within parameter keys) must be translated into a safe percent-encoded format (e.g. spaces become `%20`) to prevent parsing errors on web servers.

This tool performs this conversion locally in your browser using standard JavaScript, which means your text remains private and is never transmitted over the network.

Frequently Asked Questions

Why are URLs encoded?

URLs can only contain certain safe ASCII characters. Non-alphanumeric characters, spaces, and special symbols must be percent-encoded to prevent transmission errors.

Is my data secure during encoding?

Yes. The translation is performed client-side using JavaScript in your browser without any API calls.

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