OpusDesk Hub What this tool does
Encode special characters in URLs to make them safe for transmission, or decode percent-encoded strings back to readable text. Supports full URL encoding and component-level encoding.
How to use URL Encoder/Decoder
- Enter the String You Want to Encode. Type or paste the text or URL containing special characters like spaces, ampersands, or question marks into the input box. When you use this URL encoder decoder online tool, unsafe characters are instantly converted into their percent-encoded equivalents that browsers and servers can safely interpret.
- Choose Encode or Decode Mode. Toggle between the encode and decode modes depending on your task. Select encode to transform plain text into a URL-safe format, or switch to decode if you need to convert an encoded URL back into its original human-readable form using this free URL encoder decoder online tool.
- Copy the Encoded or Decoded Result. The converted string appears immediately in the output field ready for use. Copy the result and insert it into your application code, query parameters, or API calls to ensure reliable data transmission across the web.
How this tool works
The browser's URI component functions convert text to UTF-8 percent escapes or restore a valid escaped component.
- Engine: Native encodeURIComponent and decodeURIComponent
- Supported input: Unicode text, percent-encoded URL components
- Output: percent-encoded or decoded text
Worked example
Input: hello world?
Output: hello%20world%3F
Limits, edge cases, and troubleshooting
Use it for query values and path components. If decoding fails, look for a lone percent sign or incomplete hexadecimal pair.
- Input must fit in the text editor.
- It operates on components; encoding an entire URL can encode separators, and malformed percent sequences cannot be decoded.
When to use another workflow
Use the URL and URLSearchParams APIs in application code to construct complete URLs without double-encoding.
| Option | Best for | Trade-off |
|---|---|---|
| This browser tool | Quick, private, one-off work | Limited by browser memory and the documented feature set |
| Desktop or command-line tool | Batch jobs and repeatable automation | Requires installation and setup |
Supported inputs and limits
- Unicode text
- percent-encoded URL components
- Input must fit in the text editor.
- It operates on components; encoding an entire URL can encode separators, and malformed percent sequences cannot be decoded.
Frequently asked questions
When would I need a URL encoder decoder online in my daily work?
You need a URL encoder decoder online whenever your URL contains characters that have special meaning in web addresses, such as spaces, ampersands, percent signs, or non-ASCII characters. This is especially common when building query parameters dynamically, constructing API request URLs, or processing user-submitted form data that includes special symbols.
What is the difference between URL encoding and URL decoding?
URL encoding transforms unsafe characters into a percent-sign followed by two hexadecimal digits, making the string safe for transmission over the internet. URL decoding reverses this process, converting percent-encoded sequences back into their original characters so you can read the actual value stored in the URL parameter.
Is information sent to a server?
Tool inputs are processed in this browser. This product does not use analytics or send your input to an external API. Clicking an external website link still visits that website.