Free image resolution checker
Image Resolution Checker — Check DPI, Dimensions & Print Size
Upload a photo to see pixel dimensions, megapixels, EXIF DPI, and whether it’s sharp enough for print or web — instantly in your browser.
Drop an image here
or browse files · JPG, PNG, WebP, GIF
Resolution results
Print size calculator
Enter the size you want to print. Effective DPI = pixels ÷ inches (cm is converted ÷ 2.54). Pass requires ≥ 300 DPI.
Effective DPI
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Upload an imageDPI is the lower of width and height DPI so the whole print stays sharp.
Standard print sizes at 300 DPI
Effective DPI when fitting your image into each print size (minimum of width DPI and height DPI). Pass ≥ 300 DPI.
| Print size | Dimensions | Effective DPI | Result |
|---|
Platform minimums
Pass/fail against common guidance for your current image.
EXIF DPI is only a label
The DPI (or PPI) tag stored in EXIF metadata does not change how many pixels your photo has. Editing 72 → 300 DPI adds no detail and will not make a soft print sharp. What matters for print is pixel count ÷ print size in inches (effective DPI). Use the calculator above — not the EXIF tag alone — to decide if an image is print-ready.
How it works
Four quick steps — all processed locally in your browser.
- Upload your photo. Drag and drop or browse a JPG, PNG, WebP, or GIF. Analysis runs instantly in your browser.
- Review dimensions and DPI. See width, height, megapixels, aspect ratio, file size, format, and EXIF DPI if present (or “not set”).
- Calculate print size. Enter a desired print width and height in inches or centimeters to get effective DPI versus the 300 DPI print standard.
- Check standard sizes and platforms. Compare pass/fail for 4×6 through 24×36 and minimums for Amazon, Shopify, eBay, Instagram, and print.
Frequently asked questions
What is an image resolution checker?
An image resolution checker reads your photo’s pixel width and height, megapixels, aspect ratio, file size, and any EXIF DPI tags, then shows whether the image is sharp enough for common print sizes and platform minimums.
Does changing DPI from 72 to 300 improve my photo?
No. The EXIF DPI tag is only a label. Changing 72 to 300 does not add pixels or detail. Print quality depends on pixel count divided by print size in inches (effective DPI), not the metadata tag.
What DPI do I need for print?
Professional print standards typically use 300 DPI. Effective DPI = pixels ÷ print inches. For example, an 8×10 inch print at 300 DPI needs at least 2400×3000 pixels.
How do I check if my photo is high enough resolution for Amazon or Instagram?
Upload the image on this page. We compare your longest edge and dimensions against common platform guidance: Amazon recommends 1600px on the longest edge, Instagram feed posts work best at 1080px on the short side, and Shopify/eBay also benefit from large product images.
Is the image resolution checker free?
Yes. It runs entirely in your browser, requires no signup, and does not add watermarks. Your file is analyzed locally for dimensions and EXIF DPI.
What should I do if my image fails the 300 DPI print check?
Print smaller, or increase pixel count with an upscaler. Use our Upscale Image tool when resolution is insufficient, or the full Image Quality Checker on the homepage if you also need blur and noise analysis.