URL Encoder / Decoder
Encode and decode URL components
URL Encoder / Decoder is a free online tool from BrowserUtils that encode and decode url components. It runs entirely in your browser — your data never leaves your device. No account required.
How to use URL Encoder / Decoder
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About URL Encoder / Decoder
Free online URL encoder and decoder. Percent-encode special characters for URLs or decode encoded URL strings. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
URL Encoder / Decoder specs
- Runtime
- 100% client-side (browser)
- Built on
- TextEncoder, TextDecoder, btoa/atob, and encodeURIComponent — all Web Platform APIs
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
What is URL encoding?
URL encoding (percent encoding) replaces special characters with a % sign followed by their hex value, making strings safe to include in URLs.
Which characters need to be URL encoded?
Characters like spaces, &, =, ?, #, +, and non-ASCII characters must be encoded. Letters, digits, hyphens, underscores, periods, and tildes are safe and do not need encoding.
What is the difference between encodeURI and encodeURIComponent?
encodeURI encodes a full URI but preserves characters like : / ? # that are part of URL structure. encodeURIComponent encodes everything except letters, digits, and a few symbols, making it suitable for query parameter values.
Can I use this to fix broken URLs?
Yes, if a URL has unencoded special characters causing errors, paste it here to properly encode the problematic characters while keeping the URL structure intact.
How do I URL encode a query string with spaces?
Spaces in URLs should be encoded as %20 (or + in form data). Paste your text and the tool will replace spaces and other unsafe characters with their percent-encoded equivalents.
Does URL encoding run in my browser?
Yes, encoding and decoding happen entirely in your browser. No data is sent to a server, so it is safe to use with API keys and other sensitive URL parameters.
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