Image Format Detector
Identify the true format of any image file by reading its header bytes — instant and private.
Detect Format
Drag & drop any file here
or
Any file type
How Does Image Format Detection Work?
Our tool reads the first bytes (magic bytes) of your file to identify its true format — regardless of the file extension. This is more reliable than checking the extension alone, since files can be renamed. Common signatures include FF D8 FF for JPEG, 89 50 4E 47 for PNG, and 52 49 46 46 for WebP.
Why Detect Image Format?
Sometimes image files have wrong or missing extensions. A file named .jpg might actually be a PNG, or a downloaded image might have no extension at all. Knowing the true format helps ensure compatibility with editors, converters, and web platforms.
Supported Formats
This tool detects JPEG, PNG, GIF, WebP, BMP, TIFF, ICO, SVG, AVIF, and more. It reads file signatures locally in your browser — nothing is uploaded, so your files stay completely private.