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πŸ”— URL Encoder / Decoder

Encode URLs for safe web transmission or decode percent-encoded URLs

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URL Encoding and Decoding Made Simple

URL encoding (also called percent encoding) is essential for transmitting data safely over the Internet. When you include special characters, spaces, or non-ASCII characters in a URL, they must be encoded into a format that web browsers and servers can understand.

Our free online URL encoder/decoder handles all encoding tasks instantly in your browser. No server uploads, completely private, and supports UTF-8 encoding for international characters.

Common use cases: Encoding query parameters, building API URLs, debugging web applications, creating shareable links, handling form data, and working with internationalized URLs.

How to Use the URL Encoder/Decoder

Encoding a URL

  1. Paste your URL or text into the input field
  2. Select encoding type:
    • Component - Use for query parameter values (encodes all special characters)
    • URI - Use for complete URLs (preserves URL structure like :// and /)
  3. Click "Encode URL" - The result appears instantly below
  4. Copy the result using the copy button

Decoding a URL

  1. Switch to "Decode" mode using the dropdown
  2. Paste the encoded URL (with %20, %3A, etc.)
  3. Click "Decode URL" - Original text appears instantly
  4. Copy or swap to re-encode if needed

Quick Example

Original: https://example.com/search?q=hello world&lang=en

Encoded (Component): https%3A%2F%2Fexample.com%2Fsearch%3Fq%3Dhello%20world%26lang%3Den

Encoded (URI): https://example.com/search?q=hello%20world&lang=en

Why Choose Our URL Encoder/Decoder?

πŸ”’ 100% Private and Secure

All encoding and decoding happens entirely in your browser using JavaScript. Your URLs never touch our servers, ensuring complete privacy. No data is collected, stored, or transmitted.

⚑ Real-Time Processing

Instant encoding and decoding with no page reloads. Process multiple URLs quickly with copy-paste workflow. Character counters update in real-time.

🌍 UTF-8 Support

Full support for international characters, emoji, and any Unicode character. Encode Chinese (δ½ ε₯½), Arabic (Ω…Ψ±Ψ­Ψ¨Ψ§), emoji (πŸ˜€), or any language correctly.

🎯 Smart Encoding Options

Choose between Component encoding (for query parameters, form values) and URI encoding (for complete URLs). Component encoding is more aggressive and encodes ALL special characters. URI encoding preserves URL structure.

πŸ”„ Swap Function

Quickly swap input and output to re-encode or decode the result. Perfect for testing round-trip encoding or converting back and forth.

πŸ“‹ One-Click Copy

Copy encoded or decoded URLs to your clipboard instantly with the copy button. Visual feedback confirms successful copy.

πŸ’» Developer-Friendly

Clear distinction between encodeURIComponent() and encodeURI() behavior. Perfect for developers debugging API calls, building URLs programmatically, or learning URL encoding standards (RFC 3986).

Frequently Asked Questions

What is URL encoding?

URL encoding (percent encoding) converts characters into a format that can be transmitted over the Internet. Special characters are replaced with '%' followed by two hexadecimal digits representing the character's UTF-8 byte code. For example, a space becomes %20, ampersand becomes %26, and forward slash becomes %2F.

When should I use URL encoding?

Use URL encoding when:

  • Passing data in query parameters (?name=value)
  • URLs contain spaces or special characters
  • Building API request URLs
  • Submitting form data via GET requests
  • Including non-ASCII characters (Chinese, Arabic, emoji) in URLs
  • Working with URL fragments or hash parameters
  • Creating shareable links with data

What's the difference between encodeURI and encodeURIComponent?

encodeURIComponent() (Component mode) encodes ALL special characters except - _ . ! ~ * ' ( ). Use this for encoding query parameter values. It encodes /:?#[]@ so it's not suitable for complete URLs.

encodeURI() (URI mode) encodes fewer characters and preserves URL structure characters like /:?#[]@. Use this for encoding complete URLs where you want to keep the URL readable and functional.

Rule of thumb: Use Component for query string values, use URI for complete URLs.

Is URL encoding the same as encryption?

No! URL encoding is NOT encryption or security. It's simply a way to represent characters safely in URLs. Anyone can decode a URL-encoded string instantly. Never put sensitive data (passwords, API keys, credit card numbers) in URLs, even when encoded. Always use HTTPS for secure transmission.

Can I URL encode non-English characters?

Yes! URL encoding supports UTF-8, so you can encode characters from any language and even emoji. Each UTF-8 byte is converted to percent notation. For example:

  • Chinese: δ½ ε₯½ β†’ %E4%BD%A0%E5%A5%BD
  • Arabic: Ω…Ψ±Ψ­Ψ¨Ψ§ β†’ %D9%85%D8%B1%D8%AD%D8%A8%D8%A7
  • Emoji: πŸ˜€ β†’ %F0%9F%98%80

Why does my URL have %20 instead of + for spaces?

Both are valid depending on context. %20 is the standard percent-encoding for spaces in URLs (RFC 3986). + is used in application/x-www-form-urlencoded data (HTML form submissions). Modern APIs and RESTful services typically use %20. Our tool uses standard %20 encoding.

What characters need to be URL encoded?

Reserved characters that have special meaning in URLs must be encoded:

  • : / ? # [ ] @ ! $ & ' ( ) * + , ; =

Additionally, encode:

  • Spaces
  • Non-ASCII characters (Γ©, Γ±, δΈ­, ζ—₯, emoji)
  • Control characters and unprintable characters
  • Percent sign (%) itself β†’ %25

Can I decode a partially encoded URL?

Yes! The decoder will decode any percent-encoded sequences it finds and leave non-encoded characters as-is. This is useful when working with mixed or partially encoded URLs.

Is this tool free to use?

Yes, completely free! No sign-up, no limits, no ads blocking the tool. Use it as much as you need for personal or commercial projects.

Does this work offline?

After the page loads initially, the tool works entirely in your browser using JavaScript. No internet connection is required for encoding/decoding operations.