Why does URL decoding sometimes fail?

Decoding fails when the input has malformed percent sequences like an incomplete % value. Fix or remove invalid sequences and try again.

Can I parse a full URL, not just query parameters?

Yes. Paste either a full URL or just the query string. The parser extracts parameters and displays each key/value pair.

Fast, clean, and privacy-first. Everything runs in your browser—no data is sent to a server.

Type in either box. Conversion happens instantly.

Plain text / decoded URL

Encoded URL component

Paste a full URL or raw query string (with or without ?).

Key	Value

Add rows, enter key/value pairs, and generate a clean encoded query string.

Generated query string

What is URL encoding?

URL encoding turns characters like spaces and symbols into a safe format (such as %20) so links work correctly everywhere.

Why do I see a malformed input error?

Some encoded text includes incomplete or invalid percent values (like %A). Fix the invalid sequence and decode again.

Does this tool upload my data?

No. This app runs fully client-side in your browser and does not submit your input to any backend service.