Free Online URL Encoder and Decoder Tool
A secure, high-performance utility for converting special characters in URLs. All processing happens locally in your browser for maximum privacy.
Privacy First
Your data never leaves your computer. All transformations are performed using client-side JavaScript, ensuring your URLs and data remain private.
RFC 3986 Standards
We use standard URI encoding practices, ensuring that your encoded URLs are compatible with all modern web browsers and servers.
Instant Speed
Optimized for performance, our tool provides real-time encoding and decoding even for massive query strings or complex parameter structures.
Understanding URL Encoding
URL Encoding, also known as percent-encoding, is a mechanism for encoding information in a Uniform Resource Identifier (URI). Although it is known as URL encoding, it is, in fact, used more commonly within the main Uniform Resource Identifier (URI) set, which includes both URL and URN.
Why is it needed?
URLs can only be sent over the Internet using the ASCII character set. Since URLs often contain characters outside the ASCII set, they must be converted into a valid ASCII format. URL encoding replaces unsafe ASCII characters with a "%" followed by two hexadecimal digits.
For example, spaces are not allowed in URLs. Encoding converts a space into %20. Other common conversions include:
- Space → %20
- ! → %21
- # → %23
- $ → %24
- & → %26
- ' → %27
- ( → %28
- ) → %29