URL Encoder

Percent-encode text so it can be safely embedded in URLs, query strings, and form data.

URL Encoder

Encode text for safe use in URLs and query parameters.

Input Text

URL Encoded Text

💡 About URL Encoding

URL encoding (percent-encoding) makes text safe for use in URLs by converting special characters.

Common use cases:

Query parameters with special characters
API endpoint paths with user input
Form data submission
Safe transmission of text via URLs

Characters encoded: Spaces become %20, & becomes %26, etc.

What is URL Encoding?

URL encoding (also called percent-encoding) replaces characters that are unsafe or have special meaning in URLs with a % sign followed by the character's two-digit hexadecimal byte value. For example, a space becomes %20 and an ampersand becomes %26.

RFC 3986 defines which characters are "unreserved" (A–Z, a–z, 0–9, -, _, ., ~) and safe to use literally; all other characters must be percent-encoded to prevent misinterpretation by browsers, servers, and intermediate proxies.

Common Use Cases

Query String Parameters: Encode values passed as key=value pairs so that special characters like &, =, and ? are not mistaken for URL delimiters. Form Submissions: HTML forms with method="POST" send data as application/x-www-form-urlencoded, requiring all field values to be percent-encoded. File Path Encoding: Encode file names or directory segments that contain spaces or Unicode characters before embedding them in a URL path. OAuth and API Authentication: Signature bases in OAuth 1.0 require every component — including already-encoded values — to be double-encoded.

Tips

Encode only the value portion of a URL, not the entire URL — encoding the scheme or slashes will break the link structure. Spaces may appear as either %20 or + depending on context; %20 is correct for path segments, while + is specific to application/x-www-form-urlencoded form data. Multi-byte Unicode characters (e.g., emoji or accented letters) are first encoded as UTF-8 bytes, then each byte is percent-encoded individually.