What is URL encoding?

URL encoding (percent-encoding) replaces characters that are not safe in URLs with a % sign followed by their hexadecimal byte value, e.g. space becomes %20.

When should I encode a full URL vs. a component?

Encode individual components (query values, path segments) with encodeURIComponent. Encode a complete URL with encodeURI to preserve structural characters like / and ?.

Does it handle non-ASCII characters?

Yes. Unicode characters are first converted to UTF-8 bytes, then each byte is percent-encoded.

Best Free Online URL Encoder

URLs can only contain a limited set of safe ASCII characters. When a URL needs to include spaces, special symbols, non-ASCII characters, or reserved characters like &, =, and ?, those characters must be percent-encoded — replaced with a % followed by their hexadecimal byte values. Failing to encode URLs correctly causes broken links, failed API requests, and hard-to-debug errors. devtoolkit.sh's URL Encoder handles this precisely, supporting both full URL encoding (encodeURIComponent) for encoding individual query parameter values and partial encoding (encodeURI) for encoding a full URL while preserving its structural characters. It correctly handles Unicode characters by first encoding them to UTF-8 bytes. Whether you're building query strings, encoding redirect URLs, constructing API endpoint paths with dynamic values, or encoding form data, this tool gives you the correctly encoded output immediately, with a copy button for fast workflow integration. All encoding happens in your browser using native JavaScript APIs — nothing is transmitted to any external service.

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FAQ

What is URL encoding?: URL encoding (percent-encoding) replaces characters that are not safe in URLs with a % sign followed by their hexadecimal byte value, e.g. space becomes %20.
When should I encode a full URL vs. a component?: Encode individual components (query values, path segments) with encodeURIComponent. Encode a complete URL with encodeURI to preserve structural characters like / and ?.
Does it handle non-ASCII characters?: Yes. Unicode characters are first converted to UTF-8 bytes, then each byte is percent-encoded.