URL Encoder

URL encoding — officially called percent-encoding — converts characters that are not allowed in a URL into a safe, portable format. Each unsafe byte is replaced by a percent sign followed by two hexadecimal digits: a space becomes %20, an ampersand becomes %26, and a question mark becomes %3F. Without this step, query parameters break, API requests fail, and special characters cause silent data corruption.

Developers reach for a URL encoder every day: when building API calls with user-supplied query strings, when passing redirect URLs as parameters, when debugging webhook payloads, and when embedding text in HTML href attributes. If you have ever seen a mysterious %2F or %3D in your browser's address bar, you were looking at percent-encoded characters.

This encoder applies JavaScript's encodeURIComponent function, which encodes everything except the unreserved set (A-Z, a-z, 0-9, -, _, ., ~). That makes it safe for individual query-string values, form fields, and path segments. It produces standard RFC 3986 percent-encoding with %20 for spaces (not +).

Paste any text — including non-Latin characters, emoji, and multi-byte UTF-8 — and get the encoded string instantly. Processing happens entirely in your browser; nothing is sent to a server.