CodeASystem developer tools
Encode & decode URLs, in your browser.
Convert special characters to percent-encoded strings or inspect query parameters from complex URLs instantly.
URL Encoder / Decoder
Encode special characters and query parameters to percent-encoding or decode URL strings with query parameter inspector.
Input String or URL87 chars
Output Result
How it works
Standards-compliant URI engine. Zero uploads.
Runs natively via JavaScript URI encoding specifications in your browser tab. Safe for tokens, auth callbacks, and internal query params.