How this tool works
This tool uses encodeURIComponent and decodeURIComponent. Encode parameter values rather than an entire URL. A malformed percent-encoded input cannot be decoded and returns a clear error.
Privacy and editorial review
This tool runs in your browser and does not require an account. GrowthSparx reviews its logic and explanatory content, but you should verify outputs before production use.
Frequently asked questions
Should I encode a complete URL?
Usually no. Encode individual query-parameter values, not separators such as : / ? and &.
What does %20 mean?
It is the percent-encoded representation of a space.
Does this tool transmit the text?
No. Encoding and decoding happen in your browser.