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Why percent-encoding matters
URLs reserve characters like ?, &, and # for structure. User-supplied text must be encoded so servers parse parameters correctly and attackers cannot smuggle delimiters.
How to use this tool
Paste the string to encode or decode. Copy the transformed value. Test in the full tool with larger payloads.
Use cases
Building tracking links, fixing broken slugs, debugging OAuth redirects, preparing curl/fetch examples.
Privacy and security
Editor and conversion workflows run in your browser without uploading your content to our servers for those steps. Clear sensitive data when you finish, especially on shared machines.