URL Encoder

Encode URLs and convert special characters to percent-encoded format for safe transmission over the internet. Perfect for web forms, APIs, and query parameters.

Enter your URL or text above to encode it
Encoding Options:

Common Character Encoding Examples:

Space Character:
Original: (space) → Encoded: %20
Question Mark:
Original: ? → Encoded: %3F
Ampersand:
Original: & → Encoded: %26
Equals Sign:
Original: = → Encoded: %3D
Hash/Pound:
Original: # → Encoded: %23
Plus Sign:
Original: + → Encoded: %2B

About URL Encoding

What is URL Encoding?

URL encoding (also called percent encoding) is the process of converting special characters in URLs to a format that can be safely transmitted over the internet. Each unsafe character is replaced with a percent sign (%) followed by two hexadecimal digits representing the character's ASCII code.

Why is URL Encoding Necessary?

  • Special Characters: URLs can only contain certain safe characters
  • Reserved Characters: Characters like ?, &, =, # have special meanings in URLs
  • Spaces: Spaces are not allowed in URLs and must be encoded
  • Non-ASCII Characters: International characters need encoding for compatibility
  • Data Integrity: Ensures data is transmitted correctly without corruption
  • Security: Prevents injection attacks and parsing errors

Encoding Types

Encode Component (encodeURIComponent):

  • Encodes all special characters except: A-Z a-z 0-9 - _ . ! ~ * ' ( )
  • Best for query parameters, form data, and individual URL components
  • More aggressive encoding for maximum safety

Encode URI (encodeURI):

  • Preserves URI structure by not encoding: : / ? # [ ] @
  • Best for complete URLs that need to remain functional
  • Less aggressive, maintains URL readability

Characters That Need Encoding

  • Space → %20
  • ! → %21 (in component encoding)
  • " → %22
  • # → %23
  • $ → %24
  • % → %25
  • & → %26
  • + → %2B
  • , → %2C
  • / → %2F (in component encoding)
  • : → %3A (in component encoding)
  • ; → %3B
  • = → %3D
  • ? → %3F (in component encoding)
  • @ → %40 (in component encoding)

When to Use URL Encoding

  • Submitting form data with special characters
  • Creating query parameters for search functionality
  • Building API requests with user input
  • Handling file names with spaces or special characters
  • Processing international text in URLs
  • Preventing URL parsing errors in web applications

Common Questions

What's the difference between the two encoding types?

Encode Component is more aggressive and encodes all special characters, making it ideal for query parameters. Encode URI preserves URL structure and is better for complete URLs that need to remain functional.

Should I encode the entire URL or just parts of it?

It depends on your use case. For complete URLs, use Encode URI. For individual components like search terms or form data, use Encode Component on just those parts.

Is URL encoding reversible?

Yes, URL encoding is completely reversible. You can use our URL Decoder to convert encoded URLs back to their original form.

Can I encode multiple URLs at once?

This tool processes one URL or text string at a time. For multiple URLs, encode them individually or use the tool multiple times.

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