URL Encoder & Decoder

Uniform Resource Identifiers (URIs) and URLs are strictly limited to a defined set of US-ASCII characters according to RFC 3986. Standard web protocols designate specific characters as "reserved" delimiters—including forward slashes (/), question marks (?), ampersands (&), equals signs (=), hash symbols (#), and colons (:). When data transmitted inside a URL query parameter or path segment contains spaces, non-ASCII international symbols, or reserved delimiters, those characters must be translated into percent-encoded representations. Percent-encoding replaces unsafe characters with a percent sign (%) followed by the two-digit hexadecimal representation of their corresponding byte values. For example, a blank space becomes '%20' (or '+'), an ampersand becomes '%26', and non-English UTF-8 characters are encoded across multi-byte hex sequences. Failing to properly encode or decode URL strings leads to broken website links, corrupted query parameters, tracking loss, and HTTP 400 Bad Request errors. Our URL Encoder & Decoder offers a complete developer suite: 1. **Simultaneous Bi-Directional Conversion:** Live display generates both percent-encoded and fully decoded representations simultaneously without clicking convert buttons. 2. **Automated Query String Parser:** Automatically parses complex URL parameter strings into a structured, readable key-value table. 3. **UTF-8 Multi-Byte Precision:** Accurately encodes and decodes accented vowels, Asian scripts, Cyrillic alphabets, and emojis without data loss. 4. **RFC 3986 Compliance:** Utilizes native JavaScript encodeURIComponent and decodeURIComponent algorithms for 100% production web parity. 5. **Guaranteed Privacy:** Sensitive authentication callback tokens, tracking query parameters, and private URLs remain entirely on your local device.