Detect Image File Type Online
Detect the actual image format from file bytes, regardless of extension. Free online tool — no signup.
Drop your images here
Supports HEIC, JPG, PNG, WebP, AVIF, TIFF, GIF · 50MB max
Files
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What This Tool Does
Detect the true file format of an image by analyzing its binary signature, regardless of the file extension. Identifies mislabeled files and reveals the actual encoding. Useful for debugging image issues and verifying file integrity.
How to Use
- 1Open theimgapp.com/tools/file-type-detect in any browser
- 2Upload your images by dragging and dropping or clicking to browse
- 3Adjust the settings as needed
- 4Download your processed images individually or as a ZIP file
Privacy First — Zero File Storage
Your images are processed securely with zero persistent storage. Files are handled statelessly in memory and discarded immediately after processing. No database, no tracking, no retention.