Instantly verify if a file is truly a PNG image with our free PNG Validator Tool. Simply renaming a file extension to .png does not change the file format and often causes upload errors. This tool analyzes the internal file signature (magic numbers) to confirm the file is a valid Portable Network Graphics image.
Why use this tool?
- Fix Upload Errors: Troubleshoot why a website is rejecting your “PNG” file.
- Verify Integrity: Confirm a file is a valid Portable Network Graphics image.
- Detect Fake Extensions: Find out if a file is actually a WebP, JPEG, or GIF disguised as a PNG.
How to verify:
- Upload: Drag & drop your file into the box below.
- Instant Result: The tool will immediately confirm if the signature matches the PNG standard.
- See Details: If it’s not a PNG, the tool will identify the actual format (e.g., JPEG, GIF, WebP).
Click, Drag & Drop, or Paste
to verify if a file is a PNG
Detected Format (Signature)
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File Name
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File Size
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