How to resize an image for A4 paper
- Select Choose files and pick your photo, or drop it on the box.
- The tool fills a 2480×3508 frame and trims equally from the longer side, so the middle of your photo stays. The file keeps the format of your original.
- Select Download and upload the result.
About the 2480×3508 size
A4 paper is 210 × 297 millimetres. At 300 dots per inch that is 2480×3508 pixels, the usual target for a sharp full-page print or scan. It is also the size many document uploads expect.
2480×3508 is a 620:877 portrait frame (width divided by height is 0.707) with 8,699,840 pixels, or 8.70 megapixels. This page makes a portrait A4 canvas by filling and cropping. If you would rather keep the whole image with margins, use the fit option in the image resizer.
What happens to your photo
The table shows how common source images are treated when the tool fills 2480×3508.
| Source | Scaling | Part of the picture kept |
|---|---|---|
| 4000×3000 phone photo | enlarged 1.17× | 53 percent |
| 3024×4032 portrait photo | reduced to 87 percent | 94 percent |
| 1920×1080 screenshot | enlarged 3.25× | 40 percent |
| 1080×1080 square | enlarged 3.25× | 71 percent |
Sources smaller than the frame are enlarged because the output size is fixed, which can look soft. Platforms change their guidance over time, so check A4 paper requirements before you publish.
Tips
- The tool sets pixels only. To change the stored dpi tag, use change image DPI.
- Photos smaller than 2480 pixels wide are enlarged and will look soft in print.
- Turn the finished page into a PDF with images to PDF.
- See also: change DPI, images to PDF, image resizer, compress image to 500KB.
Your photos stay on your device. Nothing is uploaded, and there is no sign-up.