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Image Format Detector
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Inspect browser-decodable image signatures, dimensions, file size and available color-depth data.
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🖼️Click or drag any image file hereFormat is detected from file bytes, entirely in your browser
Detected Format
Upload an image above to detect its true format, dimensions, and color depth.
Inspect PNG, JPEG, GIF, WebP, BMP, ICO or SVG files by signature and actual browser decoding. See dimensions, file size, available color-depth data and reported-type mismatches.
See moreSee less about the Image Format Detector
Files are limited to 20 MiB, 8,192 pixels per side and 24 megapixels. A recognized signature alone is not enough if the browser cannot decode the image.
Key features
- Clean interface
- Fast processing
- No signup required
- Works offline
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Quick answers for Image Format Detector
How can it tell the real format if the file extension is wrong?
It reads the first few bytes of the file and checks them against the magic-number signatures for PNG, JPEG, GIF, BMP, WebP, ICO, and SVG, which is the same way image formats identify themselves regardless of what the filename says.
What does the mismatch warning mean?
It shows up when the MIME type your browser reports for the file does not match what the file's own byte signature says it is, a sign the extension or reported type may be misleading.
What color information does it show?
Bit depth and color type read directly from the format's header, such as PNG's color type byte or a JPEG's SOF marker, showing things like RGBA truecolor or an indexed palette.
Which files and limits apply?
PNG, JPEG, GIF, WebP, BMP, ICO and SVG must pass signature checks and browser decoding. Inputs are limited to 20 MiB, 8,192 pixels per side and 24 megapixels.