Free tool
Image Format Inspector
Detect the real file format from image headers.
Header checkInstantNo uploads
Why it helps
Verify file types
Check if a file extension matches the real format.
Fast results
Reads file headers locally for privacy.
Image
Image format inspector
Header check
FAQ
Quick answers about this tool.
Is this private?
Yes. All processing happens in your browser.
Do I need an account?
No. These tools are free and work without signup.
Can I use multiple files?
Yes. Most tools support batch processing.