Percent-encode or decode a URL or query string component instantly in your browser.
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- Runs entirely in your browser — your text is never sent to a server
- Percent-encodes exactly like JavaScript's encodeURIComponent
- Free, no account required
How it works
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1
Paste the text, code, or token you want to encode or decode.
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2
Conversion happens instantly as you type.
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3
Review the result, including any decoded structure.
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4
Copy the result to your clipboard.
Why use this tool
Every dev utility, one place
Format, convert, encode, decode, and generate — no more juggling ten tabs.
100% private, always
Every tool runs in your browser — your code and data are never sent anywhere.
Works on any device
Runs on Windows, Mac, Linux, iOS, and Android — nothing to install.
Instant results
No queues, no build step — results update as you type.
Built to handle real data
Full Unicode support and RFC-compliant parsing, edge cases included.
Free, always
Free to use, with no rate limits, sign-up, or trial period.
Frequently asked questions
Everything outside the unreserved alphanumeric set is converted into percent-encoded equivalents.
No, you should only encode individual query parameters; encoding a full link will break the protocol and slashes.
It strictly uses the standard percent-twenty (%20) encoding for spaces for maximum compatibility.
It performs a single pass; if a string was encoded twice, you must click decode twice to fully unpack it.
It encodes them safely, ensuring they don't prematurely split your query string parameters.
From the blog
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Decoding a JWT takes a second. Verifying one is a different job entirely — and confusing the two is how auth bugs ship. Here is how to read a token safely while you debug.
Mastering Base64: What It Is, How It Works, and When Not to Use It
Base64 is everywhere in modern web development, from data URIs to authentication headers. Here is a deep dive into how it works and common pitfalls to avoid.
Demystifying JSON: How to Troubleshoot Common Parsing Errors
JSON is the backbone of web APIs, but syntax mistakes can halt your code. Here is how to identify and fix missing commas, unescaped strings, and trailing characters.
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