How does the URL encoder & decoder work?

Simply paste your URL or text, click encode or decode, and the tool will instantly convert special characters to percent-encoded format or decode them back to readable text.

When should I use URL encoding?

URL encoding is needed when you have special characters (spaces, &, ?, #, etc.) in URL parameters, API requests, or form data that need to be transmitted safely.

URL Encoder & DecoderEncode and Decode URLs Instantly

Q: Is the URL encoder & decoder free?

Yes, Attachad's URL encoder and decoder is completely free with no limits or hidden fees. No account or signup required.

Q: What is URL encoding?

URL encoding converts special characters into a format that can be safely transmitted over the internet using the percent-encoding scheme (% followed by two hexadecimal digits).

Encode special characters to URL-safe format or decode percent-encoded URLs. Perfect for API development, query strings, and web applications.

✓ Percent Encoding✓ API Ready✓ Query String Support✓ 100% Free

0 chars

Common URL Encoded Characters

Space ( )%20

Exclamation (!)%21

Hash (#)%23

Dollar ($)%24

Percent (%)%25

Ampersand (&)%26

Plus (+)%2B

Slash (/)%2F

Question (?)%3F

At (@)%40

Colon (:)%3A

Equals (=)%3D

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Quick Tips

• Use URL encoding when passing special characters in query parameters
• Spaces become %20 in URLs (or + in some contexts)
• Always encode user input before adding to URLs for security
• Use decode to read encoded URL parameters from browser

What is URL Encoding?

URL encoding (also known as percent-encoding) converts special characters into a format that can be safely transmitted over the internet. It replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits.

Our URL encoder/decoder helps you properly format URLs for APIs, web requests, and form submissions. All encoding happens locally in your browser — your data never leaves your device.

Why Use URL Encoding?

🌐 API Development

Encode parameters for REST APIs and GraphQL queries

📝 Form Submission

Encode form data before sending to servers

🔗 Query Strings

Build safe URL query parameters with special characters

🛡️ Security

Prevent injection attacks by encoding user input

Common Scenarios for URL Encoding

Query Parameters: When you have spaces, & symbols, or special characters in URL parameters
API Calls: Sending data via GET requests in REST APIs
Form Data: application/x-www-form-urlencoded form submissions
Redirect URLs: Passing URLs as parameters in redirects
OAuth Flows: Encoding redirect_uri and state parameters

Frequently Asked Questions

What characters need URL encoding?

Characters like spaces, &, ?, #, %, +, /, and non-ASCII characters should be encoded to ensure safe URL transmission.

What's the difference between encodeURI and encodeURIComponent?

encodeURI preserves URL structure (/, ?, #) while encodeURIComponent encodes everything, including URL separators. Our tool uses encodeURIComponent for complete encoding.

Is this URL encoder free?

Yes! Attachad's URL encoder and decoder is completely free with no limits or hidden fees.

Can I encode full URLs?

Yes, you can encode full URLs. The tool will encode all special characters while keeping the URL structure readable.

Is my data stored?

No, all encoding and decoding happens locally in your browser. Your data never leaves your device.

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Ready to Encode or Decode URLs?

Start now — it's free, fast, and completely private.