URLs have strict rules about which characters are allowed. Spaces, symbols, and non-ASCII characters must be "encoded" into a specific % format to be transmitted safely across the web. Our URL Encoder/Decoder handles this instantly using standard UTF-8 encoding.

What is URL Encoding?

URL Encoding (or Percent-Encoding) is a mechanism for encoding information in a Uniform Resource Identifier (URI). Characters that are not allowed in a URL (like spaces or #) are replaced with a % followed by two hexadecimal digits. For example, a space becomes %20.

Why Encode URLs?

Ensure query parameters don't break your API calls
Safely pass complex data (like JSON) inside a URL string
Fix broken links containing spaces or special accents
Debug "400 Bad Request" errors caused by malformed URIs
Compatible with all modern browsers and servers (RFC 3986)
Privacy-first: no data leaves your browser

How to Decode/Encode

Choose Mode

Switch between "Encode" (Text to %) or "Decode" (% to Text).

Enter String

Paste the URL or text you need to convert.

Process

The tool updates the result instantly as you type.

Copy

Copy the safe string for use in your browser or code.

Key Features

Live Conversion

See the encoded output instantly without clicking buttons.

Full UTF-8 Support

Correctly handles emojis and non-English characters.

Safe Mode

Encodes all reserved characters to prevent injection issues.

Bulk Processing

Handle multiple lines of URLs at once.

Error Handling

detects malformed % sequences when decoding.

Best Practices

Always encode distinct query parameters separately, not the whole URL
Don't encode the protocol (https://) or it will break the link
Use "decodeURIComponent" compatible mode for JavaScript apps
Check for double-encoding (e.g., %2520) which is a common bug

Common Use Cases

UTM Tracking

Building marketing URLs with campaign parameters.

API Testing

Sending complex filters via GET requests.

Form Fixes

Debugging form submissions that contain special symbols.

Link Sharing

Fixing links with spaces before emailing them.

Frequently Asked Questions

What is %20?

It is the percent-encoded representation of a space character.

Does it support Unicode?

Yes, emojis and foreign characters are encoded as multiple byte sequences.

Is it reversible?

Yes, decoding returns the exact original string unless it was malformed.

Is it secure?

Yes, no data is sent to our servers.

Ready to Get Started?

100% browser-based. Your data never leaves your device.

Open URL Encoder & Decoder