URL Encoder / Decoder
Encode or decode URLs and query strings using encodeURIComponent or encodeURI.
How to Encode and Decode URLs
Choose Encode or Decode mode with the toggle, then paste your text. In Encode mode, special characters are percent-encoded so they can safely appear in URLs and query strings. In Decode mode, percent-encoded sequences are converted back to readable characters. You can also switch between encodeURIComponent (encodes everything except unreserved characters) and encodeURI (preserves URL structure characters like /, ?, and #). The output updates as you type, and the copy button lets you grab the result instantly.
When to URL Encode
URL encoding is required whenever you include user-generated or dynamic values in URLs. Query parameters with spaces, ampersands, or non-ASCII characters must be encoded to avoid breaking the URL structure or causing server-side parsing errors. APIs that accept form data use application/x-www-form-urlencoded, which is essentially URL encoding. This tool helps you debug encoded URLs, construct API requests, and verify that your backend is decoding parameters correctly. All processing runs locally in your browser.