URL DecoderDecode Percent-Encoded URLs Instantly
The fastest URL decoder on the web — convert percent-encoded URLs back to readable text, view query parameters, and compare components. Works offline, 100% private.
Enter an encoded URL to see the decoded result
Everything You Need to Decode URLs
From instant percent-decoding to query parameter extraction — every feature for working with encoded URLs.
Instant URL Decoding
Paste any percent-encoded URL and get the original, human-readable text back instantly. Works with all standard URL encoding formats including + for spaces.
Live Auto Decoding
URL gets decoded in real-time as you type with smart debouncing. Toggle auto-decode off for manual mode when working with very long or complex URLs.
Query Parameter Viewer
Automatically extracts and displays all query parameters in a clean, readable table. See each parameter name and value side by side at a glance.
Component Comparison
Side-by-side breakdown showing each URL component in both encoded and decoded form. Protocol, host, path, query params — see exactly what changed.
Reserved Character Detection
Every percent-encoded character and reserved symbol in your input is identified, counted, and displayed. Understand exactly what needs decoding.
Error Detection & Messages
Invalid percent sequences are caught and flagged with clear, human-readable error messages. Red borders highlight problem input so you know what to fix.
Undo & Redo History
Full undo/redo with keyboard shortcuts (Ctrl+Z, Ctrl+Y). Every decoding step is tracked — experiment freely and revert anytime.
Copy & Share Instantly
One-click copy to clipboard, download as .txt file, or generate a shareable link. Perfect for sharing decoded URLs with your team.
Works Completely Offline
All decoding runs locally using browser-native decodeURIComponent. No server requests, no latency, no data ever leaves your device.
How URL Decoding Works
Paste Encoded URL
Copy any percent-encoded URL — from browser address bars, API responses, or logs — and paste it into the input panel. Use Load Sample to see it in action.
Auto Decode or Manual
By default, decoding happens instantly as you type. Toggle Auto Decode off for manual control — click Decode when you're ready to see the result.
Review Components
Expand the Component Breakdown to see each part — query params, host, path — in both encoded and decoded form. Invalid sequences are highlighted in red.
Copy, Download, or Share
Copy the decoded URL to clipboard, download as a .txt file, or share via link. Use the clean, readable output anywhere — documentation, debugging, or sharing.
Better Than Other URL Decoders
100% Private & Secure
Your URLs never leave your browser. Unlike online decoders that send data to servers, everything runs locally. Safe for decoding sensitive URLs, API endpoints, and internal links.
Instant, No Waiting
Browser-native decodeURIComponent handles decoding at native speed. Zero network latency, no server queues — results appear as fast as you can paste.
Debug Made Easy
When your API returns garbled URLs or your webhook payloads look wrong, paste them here. See query parameters clearly, spot encoding issues, and fix problems fast.
Transparent Decoding
See exactly what's happening to every part of your URL. The component analyzer shows query params, hosts, and paths — encoded input vs decoded output side by side.
Validation Built-In
Invalid percent-encoding is caught immediately with clear error messages. Red borders and descriptive text tell you exactly what went wrong and how to fix it.
Full UTF-8 Support
Decodes multi-byte UTF-8 characters correctly including emoji, CJK, Arabic, Hindi, and any international text. Your decoded output reads correctly in every language.
Everything About URL Decoding
URL decoding (also called percent-decoding) converts percent-encoded characters back to their original form. When you see "%20" in a URL, it's actually a space. "%3A" is a colon, "%2F" is a forward slash. You need URL decoding when working with encoded URLs from APIs, webhooks, browser address bars, server logs, or any system that transmits URLs with percent-encoding. Our tool makes this instant — just paste and get the readable text back immediately.
Our decoder uses the browser's built-in decodeURIComponent() function which handles standard percent-encoding (RFC 3986). Simply paste an encoded URL into the input panel, and the tool decodes it in real-time using auto-decode. It also handles the "+" character (commonly used for spaces in query strings) by converting it to %20 before decoding. The query parameter viewer extracts all parameters into a clean table. Everything runs locally in your browser — no server involved.
decodeURI() only decodes characters that were NOT part of the URL structure — it skips reserved characters like :, /, ?, #, & because they have special meaning in a complete URL. decodeURIComponent() decodes ALL percent-encoded characters including reserved ones, which is what you want when decoding URL components like query parameter values. Our tool uses decodeURIComponent() to give you the most complete decoding, ensuring every character is restored to its original form.
The tool validates input in real-time and catches invalid sequences immediately. If a percent sign is followed by non-hex characters (e.g., "%ZZ" or "%0"), the decoder will throw a URIError. Our tool catches this and displays a clear, red error message explaining the problem. The input panel gets a red border to visually indicate the error. Correct the malformed sequence and the error disappears — decoding resumes automatically.
Yes! The Query Parameter Viewer automatically extracts all parameters from the decoded URL and displays them in a clean table. Each row shows the parameter name and its decoded value. This is incredibly useful for debugging API requests, checking webhook payloads, verifying UTM parameters, or understanding what data is being passed in a URL. No more squinting at long encoded strings — see everything at a glance.
Expand the Component Breakdown section to see each part of your URL in both encoded and decoded forms. The tool identifies protocol, host, port, path, fragment, and individual query parameters. Each row shows the encoded input and the decoded output side by side. This makes it easy to spot exactly where in the URL encoding was applied and verify that every component decoded correctly.
Absolutely. 100%. All decoding happens entirely in your browser using client-side JavaScript. Your URLs — including any sensitive API endpoints, authentication tokens, or internal links — are never uploaded, transmitted, stored, or logged on any server. We have no way of seeing your data. The optional auto-save feature stores input in your browser's localStorage only. This makes the tool safe for enterprise, production, and personal use.
Yes. While RFC 3986 reserves "+" as a literal character, many web systems (especially PHP and form submissions) use "+" to represent spaces in query strings (application/x-www-form-urlencoded format). Our tool intelligently handles this by converting "+" to "%20" before decoding, ensuring URLs from form submissions and legacy systems decode correctly. The decoded output shows proper spaces where "+" appears in the encoded input.
Yes. Once the page loads in your browser, you can disconnect from the internet and continue using all features — decode URLs, view query parameters, undo/redo, copy, download, share. Everything runs locally with zero network requests after the initial page load. This is ideal for working in secure environments, on planes, or anywhere with limited connectivity.
decodeURIComponent() natively handles multi-byte UTF-8 sequences. When your encoded URL contains percent-encoded Unicode characters (like %E4%BD%A0 for 你 or %F0%9F%8E%89 for 🎉), our decoder correctly converts them back to the original characters. The output displays correctly for all scripts — Latin, Arabic, Chinese, Cyrillic, Devanagari, Japanese, Korean, and emoji — making it reliable for international URLs.
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