Which characters are encoded?
The output matches the browser's encodeURIComponent behavior: it percent-encodes a single component while leaving only the characters that API preserves.
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URL Component Encoder / Decoder
Encode or decode a URL component with the browser's standard percent-encoding APIs. This tool does not parse or normalize whole URLs.
Privacy
Tool workspace
How URL component encoding works
Encode or decode one URL component with encodeURIComponent and decodeURIComponent. The tool does not parse, validate, or normalize a complete URL.
Use cases
Encode query parameters, path segments, or form values before placing them in a URL, or decode one percent-encoded component back into readable text.
Privacy
All conversions are performed locally in your browser memory. Your data is never sent to a server.
Limitations
Extremely large inputs might slow down your browser since all processing happens on the main thread.
FAQ
Is my data sent anywhere?
No. The encoding and decoding processes run entirely in your browser.
Why do I get an invalid decode error?
The error occurs if the input contains a malformed percent-encoded sequence (e.g., % followed by invalid hexadecimal characters).
Is this tool secure?
Yes, all processing is done locally in your browser. No data is sent to our servers.
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