Why this tool stays in the browser

Encode or decode URL components in the browser when a query param has spaces, unicode, or reserved characters. This is not Base64 and not HTML entities — those are neighboring tools. Use Query String Builder when you are assembling many keys, not escaping one value. No request is made; the string stays in the tab.

FAQ

Encode vs decode?

Encode turns reserved characters into percent-sequences. Decode reverses that. Both run locally.

Is this the same as Base64?

No. Use the Base64 tool for that alphabet. This page is percent-encoding for URLs.

Can I build a full query string?

Use Query String Builder when you have many keys; use this for a single value.

Why this tool stays in the browser

FAQ

Encode vs decode?: Encode turns reserved characters into percent-sequences. Decode reverses that. Both run locally.
Is this the same as Base64?: No. Use the Base64 tool for that alphabet. This page is percent-encoding for URLs.
Can I build a full query string?: Use Query String Builder when you have many keys; use this for a single value.

URL Encoder / Decoder

Quickly convert encoded URLs or messy query strings into readable text and vice versa. All processing happens in your browser.

Plain Text

Encoded URL