Use this image resolution checker to see the exact pixel width, height, megapixels and aspect ratio of any image. Drop your file below and get the information you need for web, print or social media without uploading it.
No upload, no account, 100% private. This tool works directly in your browser using HTML5 canvas technology — your image is analyzed locally and never sent to any server.
Drop your image below to check its resolution instantly.
Need to change dimensions? Use Resize Image. Need a smaller file after checking resolution? Use Compress Image.
Image resolution is the width and height of the file in pixels. The checker reads those values directly from the image, then shows megapixels and aspect ratio so you can decide if the file is large enough for your task.
For most websites, start with the actual display size. A blog image shown at 900 px wide does not need a 5000 px source file. For print, use the DPI result instead of guessing.
| Use case | Recommended resolution | Next step |
|---|---|---|
| Website image | 1200 to 2000 px wide | Optimize for web |
| Instagram post | 1080 x 1080 or 1080 x 1350 px | Resize for Instagram |
| Facebook feed | 1200 x 630 px | Resize for Facebook |
| A4 print | 2480 x 3508 px at 300 DPI | Check DPI |
Check the original resolution before you edit the file. If the image already has enough pixels, avoid unnecessary resizing and only change the file size or format. This keeps the image sharper and prevents repeated exports from reducing quality.
For websites, compare the image width with the actual layout width. If your page displays the image at 800 px wide, exporting at 1200 px is usually enough for sharp screens. For print, switch to the DPI result and confirm the target size before ordering. For social media, use the platform presets after checking that the source image is large enough for the crop.
Use the result from this page as the decision point for your next action. If the image has the wrong pixel dimensions, open Resize Image and export the exact width and height you need. If the dimensions are correct but the file is too large, use Compress Image or a fixed target page such as Compress Image to 100KB.
For print, verify the final file with the Image DPI Checker before ordering. For social uploads, use Instagram Image Size, Facebook Image Size or the full Social Media Image Size tool so the crop matches the platform before upload.