URL Decoder
Decode URL-encoded strings and text back to original format with file upload support.
URL decoding (also known as percent decoding) is the reverse process of URL encoding. It converts percent-encoded sequences (like %20 for space, %40 for at symbol) back to their original characters. This is essential when you receive URL-encoded data and need to restore it to its readable form.
Our URL decoder supports decoding both text strings and files. You can paste a URL-encoded string or upload a URL-encoded file, and our tool will decode it back to the original content.
All decoding happens in your browser - your data never leaves your device, ensuring complete privacy and security.
URL decoding reverses the encoding process:
- Percent Sequence Detection: Identifies percent-encoded sequences (percent followed by two hex digits)
- Hexadecimal Conversion: Converts the two hex digits to their decimal value
- Character Restoration: Replaces the percent-encoded sequence with the original character
- UTF-8 Decoding: For multi-byte characters, decodes UTF-8 sequences back to Unicode characters
- Output: Produces the original text or file content
Our decoder automatically detects the original file type and restores the correct filename and extension when decoding files.
Query Parameter Analysis
Decode URL query parameters to see their actual values. Useful for debugging URLs and understanding what data is being passed.
Form Data Processing
Decode form data received from HTML forms. Form submissions often use URL encoding, and you may need to decode the values.
API Response Handling
Decode URL-encoded data from API responses. Some APIs return URL-encoded strings that need to be decoded for processing.
Log File Analysis
Decode URL-encoded entries in log files to make them more readable. This helps with debugging and analysis.