Image Format Detector

Find out the real format of an image file, no matter what its extension says.

Image Tools🔒 Private: runs in your browserFree · no sign-up
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How to use Image Format Detector

  1. Add your image. Click the upload area or drag and drop your file (JPG, PNG, WEBP). Nothing is uploaded; it stays on your device.
  2. Choose your options. Adjust the settings for Image Format Detector if they are shown, or keep the defaults for a quick result.
  3. Run Image Format Detector. Press the "Image Format Detector" button and wait a moment while your image is processed.
  4. Download the result. Your result downloads straight away. Process another file whenever you like, with no limits or sign-up.

Why use Image Format Detector?

  • Private by design: runs in your browser, nothing is uploaded
  • Free with no sign-up and no watermark
  • Fast, with no upload or download wait
  • Works on phone, tablet and desktop

Common uses for Image Format Detector

  • Check why a file will not open or upload.
  • Verify a downloaded image is truly a JPG or PNG.
  • Spot mislabelled files.

Private by design

Image Format Detector runs entirely in your browser. Your image is read and processed on your own device and is never uploaded to our servers. Read our Privacy Policy for details.

Frequently asked questions

Why can an extension be wrong?

Renaming photo.webp to photo.jpg does not change its contents. Detection looks at the actual file signature instead.

Is Image Format Detector free to use?

Yes. Image Format Detector is free, needs no account and never adds a watermark to your result.

Is my image uploaded when I use Image Format Detector?

No. Image Format Detector works inside your browser, so your image stays on your device from start to finish.

What file types does Image Format Detector accept?

Image Format Detector accepts JPG, PNG, WEBP.

Is there a file size limit for Image Format Detector?

You can process files up to 50 MB each.

Does Image Format Detector work on my phone?

Yes. Image Format Detector is fully responsive and works in the browser on Android, iPhone, tablets and desktop computers.

Related tools

Image DimensionsCheck the exact pixel dimensions of an image.Compress ImageCompress JPG, PNG and WebP images to a target size or quality.Compress JPGCompress JPG images to reduce file size.Compress PNGCompress PNG images to reduce file size.Compress WebPCompress WebP images to reduce file size.Resize ImageResize an image to exact dimensions.

Explore more in Image Tools or browse all tools.