What is URL Encoder & Decoder?
This URL encoder percent-encodes text with encodeURIComponent. Paste text on the left, click Convert, and spaces, Chinese characters, and special characters like &, =, and ? become %XX sequences shown on the right. Copy the result or download it as a txt file; encoding errors display a clear message. Everything runs locally — your input never leaves the browser. Suitable for building URL query strings and debugging API requests.
▶Use Cases5 scenarios
- ◆Building query strings for GET requests
- ◆Handling URLs with Chinese text and special symbols
- ◆Debugging API calls
- ◆Creating email and share links
- ◆Learning percent-encoding rules
▶How to Use5 steps
- 1Paste the text to encode on the left
- 2Click Convert
- 3Read the %XX encoded result on the right
- 4Copy the result or download the txt file
- 5Check the error message if encoding fails
▶Features8 features
- ✓Free
- ✓No signup
- ✓Uses encodeURIComponent
- ✓Handles Chinese and special characters
- ✓One-click copy
- ✓Download as txt file
- ✓Clear error reporting
- ✓100% local processing
▶FAQ8 questions
What is URL Encoder & Decoder?
An online URL encoder using encodeURIComponent to percent-encode special characters, with copy and file download.. Everything runs locally in your browser — no uploads.
What is a URL encoder?
An online percent-encoding tool. Input: plain text. Output: the same text encoded with encodeURIComponent as %XX sequences. Used for building URL parameters and handling special characters. All processing is local.
Is it the same as encodeURIComponent?
Yes — the tool calls JavaScript encodeURIComponent under the hood, so results match your browser console exactly.
Does it support Chinese characters?
Yes. Chinese characters become UTF-8 percent sequences, e.g., 中 becomes %E4%B8%AD.
Can I download the output?
Yes. The Download button saves the result as url-encoder-output.txt.
Why are & and = encoded too?
encodeURIComponent encodes all non-reserved characters including &, =, and ?, which is the safe way to place values into URL parameters.
Does it decode as well?
The current version encodes only; use another URL decoder on this site when you need to decode.
Is my input uploaded?
No. Encoding happens locally in your browser with no network requests.