URL Encoder/Decoder

URL encoding (also called percent-encoding) converts special characters into a format that can be safely transmitted in URLs. Characters like spaces, ampersands (&), question marks (?), and non-ASCII characters must be encoded because they have special meanings in URLs or are not allowed. For example, a space becomes %20.

URL encoding converts text into a URL-safe format by replacing unsafe characters with % followed by two hex digits. URL decoding does the reverse — it converts percent-encoded characters back to their original form. For example, "hello world" encodes to "hello%20world", and decoding brings it back to "hello world".

Use URL encoding whenever you need to include special characters in a URL query string, form data, or API request. Common scenarios include passing search terms with spaces, including email addresses in URLs, sending non-English characters, or constructing GET request parameters programmatically.

Yes! All encoding and decoding happens entirely in your browser using client-side JavaScript. Your data never leaves your device or gets sent to any server. You can safely encode sensitive information like API parameters, tokens, or personal data without privacy concerns.

The encoder handles all non-ASCII characters (Chinese, Japanese, emoji, etc.), reserved URL characters (&, ?, =, #, +, etc.), unsafe characters (spaces, quotes, angle brackets), and any character outside the standard ASCII printable range. Alphanumeric characters (A-Z, a-z, 0-9) and some safe symbols (-, _, ., ~) are left unchanged per RFC 3986.