Free Toolkit

URL EncoderEncode text for safe use in URLs with percent-encoding.

URL Encoder illustration
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URL Encoder

Encode text for safe use in URLs with percent-encoding.

How to Use
1

Paste Text

Paste the text to URL-encode.

2

Auto-Encode

Special characters are converted to percent-encoded format.

3

Copy Result

Copy the URL-safe encoded string.

What Is URL Encoder?

The URL Encoder converts text into percent-encoded format suitable for use in URLs. Special characters, spaces, and non-ASCII characters are converted to %XX sequences where XX is the hexadecimal byte value. This uses the encodeURIComponent standard which encodes everything except unreserved characters (A-Z, a-z, 0-9, -, _, ., ~). This encoding is essential for query parameters, form data, and any text that needs to be embedded safely in a URL.

Why Use Our URL Encoder?

  • Encode query parameters for URLs
  • Prepare form data for submission
  • Encode file paths with special characters
  • Create safe URLs with international characters

Common Use Cases

API Development

Encode query parameters when constructing API URLs.

Web Development

Encode user input before adding to URLs.

Link Building

Create valid URLs containing special characters or spaces.

Form Data

Encode form values for application/x-www-form-urlencoded submission.

Technical Guide

The tool uses JavaScript's built-in encodeURIComponent() function, which follows RFC 3986 percent-encoding. It encodes all characters except unreserved characters: uppercase and lowercase letters (A-Za-z), digits (0-9), hyphen (-), underscore (_), period (.), and tilde (~). Spaces become %20 (not + which is a form-encoding convention). UTF-8 multi-byte characters are encoded as multiple %XX sequences. For example, the Euro sign (€) becomes %E2%82%AC. This encoding is safe for use in any URL component including query parameters, path segments, and fragment identifiers.

Tips & Best Practices

  • 1
    Spaces are encoded as %20 (standard URL encoding)
  • 2
    Use this for query string values, not entire URLs
  • 3
    UTF-8 characters are encoded as multiple %XX sequences
  • 4
    Do not double-encode already encoded strings

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Frequently Asked Questions

QWhat is percent-encoding?
Percent-encoding replaces special characters with % followed by two hexadecimal digits representing the byte value.
QWhy are spaces encoded as %20 and not +?
The + convention is specific to form data (application/x-www-form-urlencoded). Standard URL encoding uses %20 for spaces.
QShould I encode the entire URL?
No, only encode individual components like query parameter values. The full URL structure (://, /, ?) should not be encoded.
QWhat characters are NOT encoded?
Letters (A-Z, a-z), digits (0-9), and the characters - _ . ~ are not encoded as they are safe in URLs.
QHow are non-ASCII characters handled?
Non-ASCII characters are first converted to UTF-8 bytes, then each byte is percent-encoded.

About URL Encoder

URL Encoder is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.