Encode special characters for URLs or decode percent-encoded strings safely.
The ByteKiln URL Encoder encodes and decodes URL strings and percent-encoded characters entirely in your browser. Choose Component mode for individual query values or Full URL mode to encode a complete address.
Component mode (encodeURIComponent) encodes all special characters including ?, &, =, /, and # — use it for individual query parameter values. Full URL mode (encodeURI) preserves structural characters so the address stays valid.
Switch to Decode to convert %XX sequences back to readable text. Malformed or incomplete percent sequences are detected and shown as a clear error message rather than producing garbled output.
Encode values before appending them to query strings or embedding them in path segments. Special characters like spaces, &, =, and # have reserved meanings in URLs and must be encoded to avoid silently breaking requests.
Short answers for the things developers usually ask before trusting a tool.
Component mode uses encodeURIComponent, which encodes everything including ?, &, /, =, and # — use it for individual query string values. Full URL mode uses encodeURI, which preserves URL structure characters so the full address remains navigable.
URL-encode values before including them as query parameters or path segments in a URL. Special characters like spaces, &, =, and # have reserved meanings in URLs and must be encoded to avoid breaking the request.
No. The ByteKiln URL Encoder runs entirely in your browser. Your input is processed locally and never transmitted or stored.
The decoder detects invalid percent sequences and shows a readable error message rather than throwing silently or returning garbled output.
Percent-encoding (also called URL encoding) replaces unsafe characters with a % sign followed by two hexadecimal digits representing the character's UTF-8 byte value. For example, a space becomes %20 and & becomes %26.
Useful follow-ups when one conversion usually turns into three more.