URL Encoder & Decoder
Encode text for use in URLs or decode percent-encoded URL content instantly in your browser.
Free Online URL Encoder and Decoder
UtiliPilot’s URL encoder decoder converts text into percent-encoded form and converts encoded URL components back into readable text. The tool runs directly in your browser and is useful for developers, marketers, analysts and anyone working with query parameters or web addresses.
What Is URL Encoding?
URLs can contain characters that have special meanings or are unsafe in certain URL components. Percent-encoding represents those characters using a percent sign followed by hexadecimal values. For example, a space can be represented as %20, while characters from non-ASCII languages are represented through their UTF-8 byte sequence.
How to Encode a URL Component
- Paste the text you want to place inside a URL component.
- Click Encode.
- The tool applies JavaScript’s
encodeURIComponent()behavior. - Copy the encoded output into a query parameter, path component or application where appropriate.
How to Decode URL-Encoded Text
- Paste percent-encoded content into the input field.
- Click Decode.
- The tool validates and decodes the sequence using
decodeURIComponent(). - Copy the readable result.
Common URL Encoding Examples
| Character / text | Encoded example |
|---|---|
| Space | %20 |
| & | %26 |
| = | %3D |
| # | %23 |
| hello world | hello%20world |
encodeURI vs encodeURIComponent
This tool uses component-style encoding because it is typically the safer choice for individual query values and URL components. JavaScript’s encodeURI() is intended for a complete URI and deliberately leaves several URI syntax characters unchanged. encodeURIComponent() encodes more reserved characters, making it more suitable when encoding a single parameter value.
URL Encoding for Query Parameters
Suppose a search parameter contains coffee & tea. Placing the raw ampersand into a query string can be interpreted as a separator between parameters. Encoding the value produces coffee%20%26%20tea, preserving the intended text as one parameter value.
UTF-8 and International Text
Modern URL encoding works with UTF-8. Accented letters, symbols and characters from many writing systems may become multiple percent-encoded byte sequences. Decoding reverses those sequences when the input is valid UTF-8 percent-encoded data.
Invalid Encoded Input
A percent sign must be followed by a valid encoded sequence when decoding. Incomplete or malformed sequences can cause decoding to fail. This tool catches those errors and displays a message rather than silently returning misleading output.
Privacy
Encoding and decoding are performed locally by your browser. The text entered into the fields does not need to be sent to a server for conversion.
Related Developer Tools
Working with encoded data? Try the Base64 Encoder & Decoder, JSON Formatter, URL Parser or Slug Generator.
Frequently Asked Questions
Is URL encoding the same as encryption?
No. URL encoding is a representation format and provides no confidentiality. Encoded text can be decoded easily.
Why does a space become %20?
The percent-encoded representation of the ASCII space byte is hexadecimal 20, producing %20.
Should I encode an entire URL with this tool?
The encoder uses component-style encoding. It is best suited to individual values or components. Encoding an entire URL this way will also encode structural characters such as slashes and colons.
Can it encode Unicode text?
Yes. Browser encoding functions convert Unicode text through UTF-8 before creating percent-encoded sequences.
Does the tool store my input?
The conversion itself runs locally in your browser and does not require a server-side encoding service.
How to Use the URL Encoder & Decoder
Enter text or a URL component, then choose encode or decode. URL encoding converts reserved or non-ASCII characters into percent-encoded form so they can be transmitted safely inside URLs and query strings.
Practical Example
The text hello world is encoded as hello%20world, while decoding converts it back to the original readable text.
Factors That Affect the Result
Whether you encode a full URL or only a component, existing percent-encoded text, plus signs, Unicode characters and repeated encoding can change the result. Avoid encoding an already encoded value unless that is intentional.
Frequently Asked Questions
Why are spaces encoded?
Spaces are not valid literal characters in many URL contexts, so they are commonly represented as percent-encoded values.
What does percent encoding mean?
It represents a byte using a percent sign followed by two hexadecimal digits.
Can decoding fail?
Malformed percent sequences can cause decoding errors or unexpected output.