Instantly confirm if a file is a valid JPEG image with our free JPEG Validator Tool. Renaming file extensions (e.g., from .webp to .jpg) often breaks images. This tool checks the internal file signature (magic numbers) to verify the file is truly a Joint Photographic Experts Group (JPEG) image.
Why use this tool?
- Debug broken images: Find out why a photo isn’t displaying correctly.
- Format Verification: Ensure your files meet the requirements for printing or web uploads.
- Detect mismatched extensions: Identify if a file is actually a PNG, WebP, or GIF disguised as a JPEG.
How to verify:
- Upload: Drag & drop your file into the box below.
- Instant Check: The tool will immediately analyze the file header.
- Get Results: See a Green Checkmark if it’s a valid JPEG, or get the true format if it fails.
Click, Drag & Drop, or Paste
to verify if a file is a JPEG
Detected Format (Signature)
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File Name
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File Size
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