Image Resolution Checker
Check image dimensions, megapixels, aspect ratio and format.
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About Image Resolution Checker
Before a picture goes to a printer, a marketplace or a design brief, it helps to know what it really is. Drop an image and the page reports its width and height as displayed, the megapixel count, the aspect ratio, the format, the file size and whether it is landscape, portrait or square. A table then lists the largest print size at 72, 150 and 300 pixels per inch. The image is read in your browser, so nothing is uploaded.
Features
- Pixel size as displayed, with a phone's rotation flag taken into account
- Megapixel count and a simplified aspect ratio
- Largest print size at 72, 150 and 300 PPI
- A short suitability note based on the longest side
- Copy details button for pasting into a brief or ticket
- Accepts JPG, PNG, WebP, GIF and BMP files
Limitations
- Files up to 100 MB are accepted.
- Only pixel facts are reported. Sharpness, noise and compression quality are not measured, and the suitability notes rest on pixel size alone.
- Print sizes are calculated at fixed PPI values; any DPI tag stored inside the file is ignored.
How it works
- Drop an image onto the upload area, or browse for one.
- Read the details panel: resolution, megapixels, aspect ratio, format, file size and orientation.
- Check the print size table for 72, 150 and 300 PPI, and the short notes under it.
- Select Copy details to put the summary on your clipboard.
- Use Reset to check another image.
Frequently asked questions
- Resolution is the number of pixels across and down. DPI or PPI only matters when printing, because it sets how many pixels fit in an inch. This page divides your pixel count by 72, 150 and 300 to show the print size at each, and does not read the DPI tag in the file.
- Many phone photos are stored sideways with a rotation flag. The checker applies that flag, so the numbers match what a viewer shows, and it adds a note when the stored image is rotated (EXIF values 5 to 8).
- Width times height, divided by one million, rounded to two decimals. Very small images keep more decimals, so a tiny file never shows as zero.
- They look only at the longest side. Under 800 px is called small, under 1920 px suits most web and social use, under 3840 px is full-HD or larger, and anything bigger is described as high resolution for large displays and prints.
- No. The tool has no download step, so it never asks you to sign in. The file is decoded by your browser and the details appear straight away.
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