Free Online URL Decoder Tool
Decode any percent-encoded URL or string back into its original readable format instantly. Perfect for debugging redirects, inspecting query parameters, and understanding API call data. Handles %20, %23, %26, %2F, and all percent-encoded sequences. 100% private.
https://example.com/api/search?q=hello world&category=books & more&lang=日本語&emoji=🎉👋&filter={price:10-50}&callback=testUses decodeURIComponent · 100% client-side
How to Use the URL Decoder Tool
Enter Encoded Input
Type or paste your percent-encoded URL or string into the input area. The tool accepts any valid percent-encoded text including %20 (spaces), %23 (#), %26 (&), and %2F (/).
Auto-Decode Instantly
The tool automatically decodes your input in real-time using decodeURIComponent(). All percent-encoded sequences are converted back to their original characters.
Copy or Clear
Copy the decoded string to your clipboard, or clear both fields to start over. Use the sample button to test with pre-loaded encoded data.
Powerful URL Decoder Features
Everything you need to decode percent-encoded URLs and strings — all in one free tool.
Instant Decoding
See your percent-encoded string decoded in real-time as you type. No buttons to click — just paste and go.
Unicode & Emoji Support
Correctly decodes multi-byte percent-encoded UTF-8 sequences, restoring emojis, accented letters, and international characters.
All %-Sequences Supported
Handles all percent-encoded characters: %20 (space), %23 (#), %26 (&), %3D (=), %2F (/), %3F (?), and any other %XX hexadecimal sequence.
Copy to Clipboard
Copy the decoded output to your clipboard with a single click.
Character Count
Track input and output character counts to understand decoding compression.
Clear & Sample
Load sample percent-encoded data to test decoding or clear both input and output instantly.
Error Detection
Detects invalid percent-encoding (like incomplete %XX sequences or % followed by non-hex characters) and shows clear error messages.
100% Client-Side
All decoding happens in your browser. Your data never leaves your device — no uploads, no servers, no privacy concerns.
Why Use Our URL Decoder Tool
The fastest, most private way to decode percent-encoded URLs online. No sign-up, no limits, no data leaving your browser.
100% Free
No hidden fees, no premium plans, no usage limits. Decode as much data as you need, as often as you want.
Privacy First
Your data never leaves your browser. Everything is processed locally — no server uploads, no data logging.
Unicode Ready
Properly decodes multi-byte UTF-8 percent-encoded sequences, correctly restoring emojis and international characters.
Developer-Friendly
Perfect for debugging redirect chains, inspecting encoded query parameters, decoding API payloads, and understanding URL structures.
Key Highlights
- No sign-up or registration required
- Processes everything in your browser — zero server uploads
- Supports all percent-encoded sequences (%XX)
- Proper UTF-8 multi-byte sequence decoding
- Works on any device — desktop, tablet, or mobile
- Instant real-time decoding as you type
Frequently asked questions
What is URL decoding?
URL decoding (also called percent-decoding) is the reverse of URL encoding. It converts percent-encoded character sequences (like %20, %23, %26) back into their original characters (space, #, &). This is essential for reading and understanding encoded URLs, query parameters, and API data.
Is this URL decoder really free?
Yes, completely free. There are no hidden charges, no usage limits, and no premium features locked behind a paywall. Use it as much as you need, whenever you need it.
Is my data secure?
Absolutely. All decoding happens entirely in your browser using JavaScript. Your data is never sent to any server, stored, or logged. This means sensitive URLs, API tokens, and query parameters stay completely private.
What percent-encoded sequences are supported?
All standard percent-encoded sequences (%XX where XX is a two-digit hexadecimal number) are supported. This includes %20 (space), %23 (#), %24 ($), %25 (%), %26 (&), %2B (+), %2C (,), %2F (/), %3A (:), %3B (;), %3D (=), %3F (?), %40 (@), and multi-byte UTF-8 sequences for Unicode characters and emojis.
What happens if I enter invalid percent-encoding?
The tool detects invalid sequences like incomplete % followed by non-hex characters and displays a clear error message. This helps you identify and fix malformed encoded data.
Can I decode URLs with Unicode and emojis?
Yes! The tool properly decodes multi-byte percent-encoded UTF-8 sequences, correctly restoring emojis, accented letters, Chinese, Japanese, Arabic, and any other Unicode characters.
What's the difference between decodeURI and decodeURIComponent?
decodeURI() decodes a complete URI but won't decode characters that are part of URI syntax (like #, ?, &, /, =). decodeURIComponent() decodes everything, making it the preferred method for decoding query parameter values. Our tool uses decodeURIComponent() for the most complete decoding.
Do I need to install anything?
No installation required. The URL decoder works entirely in your web browser. Just open the page and paste your encoded string. No downloads, no plugins, no setup.
Can I use this on my phone?
Yes, the tool is fully responsive and works on all devices — desktops, tablets, and smartphones. The interface adapts to your screen size for comfortable use anywhere.