About this tool
The URL Encoder/Decoder applies percent-encoding and decoding to strings. Use it when passing text through query parameters, fixing mojibake in copied URLs, or preparing redirects. All encoding happens in your browser.
URL Encoder/Decoder
Encode and decode URLs, parse URL components and query parameters
How to use
- Pick encode or decode mode.
- Paste a string or URL into the input.
- Choose whether to encode the full URL, only the query component, or a single value.
- Read the converted result.
- Copy it back into your address bar, request, or code.
Common use cases
- Building a search URL with special characters in the query.
- Decoding a gnarly share link to read the original parameters.
- Fixing %20 vs + confusion in a form-encoded body.
- Preparing redirect URLs for an OAuth flow.
- Sharing a non-ASCII URL in a chat app without it breaking.
Frequently asked questions
What is the difference between encodeURI and encodeURIComponent?
encodeURI preserves URL structure characters like :/? while encodeURIComponent escapes everything. The tool exposes both modes so you pick what fits.
Why do I sometimes see + instead of %20?
In form-encoded bodies, spaces become +. In generic URLs, spaces become %20. The tool can produce either depending on context.
Will repeated encoding break my URL?
Yes. Every extra encoding converts % into %25. Decode once before re-encoding.
Is my input sent anywhere?
No. Encoding and decoding happen locally in your browser.