Free, local, and no sign-up
Free file tools,
right in your browser.
Check, clean and convert files without handing them over. Every tool here runs on your device: nothing is uploaded, there’s no account, and they’re free to use.
Identify
Find out what a file really is, and what an image says about its origin.
File type checker
Find a file’s real type from its contents and spot misleading extensions.
Image credentials & AI labels
Read embedded Content Credentials and any AI declarations in JPEG, PNG or WebP.
Clean
Take out what a photo reveals before you share it.
Remove image metadata
Strip EXIF, GPS location and camera details from JPEG, PNG and WebP images.
Convert
Change an image’s format without uploading it anywhere.
HEIC to JPG
Convert iPhone and iPad HEIC photos to JPG or PNG, right in your browser.
WebP to JPG
Convert WebP images saved from websites to JPG or PNG, one or many at once.
PNG to JPG
Convert PNG images to JPG, choosing the quality, up to 50 at a time.
Guides
Practical guides to unknown file types, magic bytes and mismatched file extensions.
- How to Check Whether an Image Discloses AI Use
Learn what C2PA Content Credentials reveal about AI-generated images, how to interpret validation results, and why missing metadata proves nothing.
- What does a file extension mismatch mean?
Understand why a file’s extension can disagree with its contents, when renaming helps, and why changing an extension does not convert a file.
- How to identify an unknown file type
Find out what a file is when it has no extension, the wrong extension, or refuses to open. Learn what file signatures can—and cannot—tell you.
Need more than a quick check?
The File Sniff app for Mac, iPhone and iPad adds broader detection and folder scanning, with analysis kept on your device.