URL encoder/decoder · Guide
Common URL Encoding Mistakes
A few recurring mistakes cause most broken links. Here is what to watch for.
Encoding the entire URL
Running a full URL through an encoder escapes the colons and slashes it needs to be valid. Encode only the parts that are data — usually parameter values.
Double-encoding
Encoding twice is a classic bug. If you see %25 where you expected %, the value was encoded an extra time. Track how many times a value passes through encoding.
Frequently asked questions
Can I use this for production work?
Yes, for inspection, formatting and quick generation. Still review the output before committing it to production code or configuration.
Ready to try it?
Open the free browser-based URL encoder/decoder and apply what you just read — no sign-up, runs locally.
Open the URL encoder/decoder tool