What is URL Decoding?
URL decoding is the inverse operation of URL encoding. It converts a percent-encoded representation of characters back into its original UTF-8 layout. The decoding algorithm parses the target string, identifies every percent sign (`%`), reads the subsequent two hexadecimal characters, and reconstructs the corresponding byte array into human-readable text.
How to use URL Decoder
- Select your preferred mode: Decode Component is ideal for standard query strings, whereas Decode Full URI preserves main URL schemas.
- Paste your encoded string (e.g., text featuring expressions like `%20`, `%3F`, or `%2F`) into the input area.
- The application decodes the string instantly, populating the plain text output box in real time.
- Click Copy Decoded to copy the decoded plain text directly.
Benefits of URL Decoder
- Readability Restoration: Easily translates cryptic percent-encoded URLs back into clear, human-readable paths.
- Multi-language Reconstruction: Restores encoded international scripts (like Cyrillic, Chinese characters, or Arabic) and complex emojis without data loss.
- Local and Secure: All calculations take place entirely inside your browser sandbox. None of your URL query contents are sent over the network or analyzed on a server.
Frequently Asked Questions (FAQ)
Why do I see a "Decoding failed" error message?
This error is triggered when a `%` sign in your input is followed by characters that are not valid hexadecimal values, or if the percent symbol is at the very end of the text. In such cases, JavaScript's built-in decoding functions reject the input as malformed.
Does this tool decode Base64 data?
No. URL percent-decoding is distinct from Base64 encoding. To decode Base64 strings, please navigate to our dedicated Base64 Decoder utility page.