File Extension Detector
Got a file with no extension, or one that won't open? Find its real extension and fix it.
Drop the mystery file
files without an extension are welcome
—Current extension
—Correct extension
—Format
● Your files are processed locally in your browser and are not uploaded to our servers.
How it works
Files sometimes lose their extension (downloads from some websites, WhatsApp or email exports, recovered files) or get the wrong one. KadiTools reads the file's signature, suggests the correct extension and gives you a copy with the fixed name — the content itself is unchanged.