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
Our Free Online PNG Validator is an essential technical utility for developers, webmasters, and digital artists who need to verify the integrity of their image assets. This no-signup tool performs a deep scan of your file to ensure it is a properly formatted, valid PNG. It checks for critical data chunks, identifies potential corruption, and confirms that the file structure meets official specifications. Whether you are troubleshooting a broken image on your website or verifying exports from a design tool, our validator provides instant, reliable feedback to ensure your images are web-ready and compliant.
We provide a completely unlimited and private verification experience. Unlike other diagnostic tools that require you to upload files to a remote server, our private PNG checker operates entirely within your local browser. This means your sensitive graphics and proprietary assets never leave your computer, offering 100% data security. Simply drag and drop your file to confirm its validity in milliseconds. It is the fastest and most secure way to audit your PNG library with zero cost and no account required.