Image Format Info
Instantly detect the true format of any image by reading its magic bytes — not just the file extension. Also reports width, height, aspect ratio, MIME type, and file size. All analysis happens locally in your browser.
100% in your browser. Your file never leaves your device.
Drop an image to analyze its format.
How to use
- 1. Drop an image file onto the upload zone.
- 2. Click "Analyze image" to detect format and read dimensions.
- 3. View the results: format, width, height, aspect ratio, file size, and MIME type.
Frequently asked questions
Is this tool free?
Yes, completely free with no usage limits.
Does my photo get uploaded anywhere?
No. Format analysis reads file headers and renders images locally in your browser — nothing is uploaded.
Does it work on mobile?
Yes. Works in any modern mobile or desktop browser.