Check If Image Is PNG
Quickly determine whether any image file is truly in PNG format using secure, private, and 100% in-browser processing.
Drag and drop an image here or select a file from your device
About This Tool
The Check If Image Is PNG tool allows anyone to instantly verify whether an image file is genuinely a PNG file. Many images may appear to be PNG based on their extension, but this tool inspects the actual internal file signature to confirm authenticity.
All processing happens directly in your web browser. No file is ever uploaded to any server, ensuring complete privacy and security.
Key Benefits of Using This Tool
- Completely free to use with no registration required
- Works instantly on any modern device or browser
- No internet upload - 100% local file processing
- Accurate validation using real PNG file signatures
- Protects privacy and sensitive image data
Features of This Tool
- Drag and drop image support
- Instant PNG signature verification
- Displays file name and size information
- Mobile and desktop friendly interface
- Works offline after page load
- No tracking or data collection
Use Cases
- Verify images before uploading to websites
- Confirm image formats for development projects
- Check files received from third parties
- Validate images before editing or conversion
- Troubleshoot format compatibility issues
- Quality assurance for digital assets
Fun Fact About This Tool
Every genuine PNG file begins with the exact same 8-byte sequence, known as the PNG magic number. This tiny signature is what makes it possible for this tool to recognize PNG files instantly without analyzing the entire image.
Historical Context of PNG Format
The PNG image format was introduced in 1996 as an open and improved alternative to the GIF format. It was designed to provide better compression, full-color support, and transparency without patent restrictions.
Over time, PNG became one of the most widely used image formats on the internet due to its lossless quality and universal compatibility. Tools like this one rely on the original PNG specification to accurately verify files even decades after the format was created.