Print services, journals and application portals reject images that aren't 300 DPI. This tool sets your JPG or PNG to exactly 300 DPI by rewriting the file header — pixels untouched, zero quality loss, nothing uploaded.
The DPI field is preset to 300. Drop the file, click convert, download.
Automated submission checks read one header value to judge print quality. Cameras and screenshots typically write 72 DPI into that header even when the image has plenty of pixels for sharp printing. The rejection isn't about your image — it's about the label. This tool relabels the file to 300 DPI losslessly. One caveat worth knowing: DPI only matters together with pixel count. A 600 × 400 px image at 300 DPI prints just 2 × 1.3 inches — if a service also specifies minimum pixels, check the table below.
The tool reads the current DPI from the file header and shows it.
300 for print and journals, 150 for large-format, 72 for screen. Or type any custom value.
Only the density header changes — JFIF and EXIF resolution fields for JPEG, the pHYs chunk for PNG. Pixels are untouched.
Same image, same quality, new DPI — accepted by print services and submission systems.
| Print size | Pixels required |
|---|---|
| 4 × 6 in (10×15 cm) | 1200 × 1800 px |
| 5 × 7 in | 1500 × 2100 px |
| 8 × 10 in | 2400 × 3000 px |
| A4 (8.3 × 11.7 in) | 2480 × 3508 px |
| 2 × 2 in passport photo | 600 × 600 px |
| Letter / journal figure | 2550 × 3300 px |
Short on pixels? Use the free Upscale tool first, then set 300 DPI here.
Unlike tools that re-encode the image (and degrade quality), this rewrites only the metadata header. Every pixel byte stays identical.
See what DPI your image claims before changing it — useful when a submission system rejects "low resolution" files.
DPI conversion happens in your browser. Print-ready artwork and documents never leave your device.
No queue, no processing wait — header rewrite completes in milliseconds even for 50 MB files.