This free image checker online free tool analyzes resolution, DPI and image quality instantly – directly in your browser. No upload required.
This image resolution checker shows pixel dimensions and calculates print size instantly.
This image quality checker helps you determine if your image is suitable for print, web or social media.
Drop your image or click below to instantly check resolution, DPI and print size.
Drop your images to start analysis
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Supports JPG, PNG, WebP – images are processed locally in your browser.
ImageToolSuite is a suite of free, privacy-first image tools. Every tool runs directly in your browser — no uploads, no accounts, no data ever leaves your device. Choose the tool that matches your task:
This free image checker tool runs entirely in your browser — no server, no upload, no waiting. Drop or select any image and get an instant analysis in three steps.
Choose any JPG, PNG or WebP. Nothing is transmitted to any server.
The tool reads pixel dimensions, DPI, file size, EXIF data and sharpness score.
See print size estimates, social format checks and optional resize & download.
Image resolution describes the total number of pixels in a digital image, expressed as width × height (e.g. 4000 × 3000 px). The higher the pixel count, the more detail the image contains — and the larger it can be printed or displayed without degradation.
When people use an image resolution checker, they want to know: how many pixels does the image have, and how large can it be printed while still looking sharp? That second question requires DPI. To check your image's print readiness directly, use the check image DPI.
A 1000 × 1000 px image is low resolution for print but fine for a small web profile picture. Context always matters.
DPI (dots per inch) describes print density — how many ink dots fit within one inch of printed output. Resolution (pixel count) is a fixed property of the file. DPI is the relationship between the file and the physical output.
The same image can be printed at different DPI values, changing the print size without altering the pixel data.
72 DPI — standard for screens. 150 DPI — acceptable for posters. 300 DPI — professional print standard. If your image needs to be larger for print, the first step is to resize image online to higher pixel dimensions.
The minimum pixel dimensions depend on your print size and quality requirements. Use this table as a quick reference:
| Image Size (px) | DPI | Print Size | Quality |
|---|---|---|---|
| 3000 × 2000 | 300 | 10 × 6.67 in | Print-ready |
| 1500 × 1000 | 300 | 5 × 3.33 in | Print-ready |
| 3000 × 2000 | 150 | 20 × 13.33 in | Draft / Poster |
| 800 × 600 | 300 | 2.67 × 2 in | Small print only |
| 640 × 480 | 72 | 8.9 × 6.7 in | Screen only |
| 4000 × 3000 | 300 | 13.3 × 10 in | Large format |
Formula: inches = pixels ÷ DPI. For cm, multiply by 2.54.
A 4000 × 3000 px image at 300 DPI prints at 13.3 × 10 inches (33.8 × 25.4 cm) — large format, print-ready quality.
The same image at 150 DPI prints at 26.7 × 20 inches. Twice as large, but noticeably softer. Fine for a poster viewed from a distance, not for close-up print work.
At 72 DPI, it would cover 55.6 × 41.7 inches — far too large to look sharp. Use the free image checker tool above to instantly calculate the exact print size for your own image. See also our image checker FAQ for common questions.
ImageToolSuite was built out of a simple frustration: too many image tools require uploading your files to a remote server — even for basic tasks like checking resolution or resizing a photo. That means your images pass through someone else's infrastructure, get stored in logs and are subject to data retention policies you never agreed to.
Every tool on this site uses the browser's built-in HTML5 File API and Canvas API to process images locally on your device. This is not a policy promise — it is a technical constraint. There is no server-side code that could receive your images, because images are never sent anywhere in the first place.
The result is a suite of tools that is genuinely faster, genuinely private and completely free. No accounts. No subscriptions. No ads served against your uploaded content. If you need to resize an image, compress it for email, optimize it for web performance, check if it is print-ready or prepare it for social media — you can do all of that here, without ever handing your files to a third party.