Inspecting Obfuscated Ad & Affiliate Redirect Links
Decode nested `redirect_url=https%3A%2F%2F...` parameters from Google Ads, Facebook tracking links, and email click-wrappers to see the true destination URL.
URL Decoder
Convert messy percent-encoded links, tracking redirect URLs, and API query strings (`%20`, `%3A`, `%2F`, `%3F`, `%26`) back into clean, human-readable text. Supports full UTF-8 multibyte character reconstruction and alerts you immediately if an escape sequence is malformed.
How to Use the URL Decoder
- 1
Paste your percent-encoded URL or query parameter value into the left input box.
- 2
Choose 'Query value' mode (`decodeURIComponent`) to decode all percent escapes including `%2F` and `%26`, or 'Whole URL' mode (`decodeURI`).
- 3
Read the decoded human-readable text immediately on the right.
- 4
Click Copy Decoded to copy the clean string to your clipboard.
Practical Use Cases
Debugging Encoded Query Strings & Form Submissions
Read human-friendly values from server access logs, webhook query strings, and OAuth callback parameters.
Cleaning Copy-Pasted International URLs
Turn long `%E2%80%94` or non-Latin percent-encoded browser URLs back into readable words for documentation and spreadsheets.
URL Decoder Features
Complete Percent-Escape Decoding
Converts `%20`, `%3A`, `%2F`, `%3F`, `%3D`, `%26`, and UTF-8 sequences back into plain characters.
UTF-8 International & Emoji Support
Reconstructs multi-byte percent sequences into readable Unicode text.
Malformed Sequence Detection
Clearly warns if a truncated or unescaped `%` character breaks RFC 3986 syntax.
Runs 100% in your browser
Nothing is uploaded to a remote server, so your data and files stay strictly on your device.
Free and unlimited
No account registration, no watermarks, and no daily usage caps.
Mobile and desktop ready
Responsive layouts and comfortable touch controls that fit phones, tablets, and desktops.
Technical Specifications & Best Practices
- ✓'Query value' mode (`decodeURIComponent`) decodes every `%XX` hex pair in the string and is the right choice for 99% of inspection tasks.
- ✓If a string contains a literal `%` sign (like `50% off`) that is not followed by two valid hexadecimal digits (`0–9`, `A–F`), the parser will flag an invalid escape sequence.
- ✓To encode plain text or parameters back into safe URL format, use our companion URL Encoder.
- ✓Runs 100% locally in your browser — private tracking URLs and OAuth tokens are never sent to a server.