Encode or decode URLs and query parameters instantly.
URL encoding (also called percent-encoding) replaces special characters with a % sign followed by two hex digits. For example, a space becomes %20. This ensures URLs are transmitted correctly over the internet since URLs can only contain ASCII characters.
Component mode (encodeURIComponent) encodes everything except letters, digits, and - _ . ~ — ideal for encoding individual query parameter values. Full URI mode (encodeURI) preserves characters that have special meaning in URLs like :, /, ?, #, &, = — ideal for encoding complete URLs while keeping the structure intact.
Yes. All encoding and decoding happens entirely in your browser using JavaScript. No data is ever sent to any server. You can even use this tool offline.
Yes! This tool handles the full Unicode character set including emojis, CJK characters, and other multibyte characters. They are encoded using UTF-8 percent-encoding.