URLエンコード

What Is URL Encoding?

URL encoding (also called percent-encoding) converts characters that aren't allowed in URLs — such as spaces, special symbols, and non-ASCII characters — into a % followed by a two-digit hexadecimal code. This ensures the URL remains valid and unambiguous across all systems.

Decoding reverses this process, converting percent-encoded sequences back to their original characters for readability.

How to Encode and Decode URLs

1. Choose between URL encode or decode
2. For encoding: enter text to make URL-safe
3. For decoding: paste an encoded URL or parameter
4. Copy the encoded or decoded result

Features

• Encode text to URL-safe format with percent encoding
• Decode URL-encoded strings back to plain text
• Preserve special URL characters or encode them
• Support for all Unicode characters

Common Use Cases

• Encoding query parameters that contain spaces or special characters
• Decoding percent-encoded URLs from log files for readability
• Preparing form submission values for inclusion in GET request URLs

Why Use ToolPop URL Encoder

• Encodes and decodes full URLs or individual query string components
• Handles all special characters including Unicode beyond the ASCII range
• Shows the encoded and decoded forms side by side for easy comparison

ToolPop vs encodeURIComponent()

JavaScript's encodeURIComponent() is the standard for URL encoding but requires running code in a console or script. ToolPop encodes and decodes in a visual interface with no code required, and it clearly shows which characters were affected by the conversion.

Tips

• Encode query parameters for safe URL construction
• Decode URL-encoded search queries to read original text
• Prepare text for use in URLs and web parameters

Frequently Asked Questions

What characters get encoded?

Special characters like spaces, &, ?, #, and non-ASCII characters are encoded to percent-encoding format (e.g., space becomes %20).

Should I encode the entire URL or just the parameters?

Typically encode only the parameter values. The domain and path are already URL-safe and don't need encoding.

Does encoding happen securely in my browser?

Yes. All encoding and decoding happens locally in your browser without any external data transmission.

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