How to change an image to 300 DPI
- Choose a JPG or PNG from your device.
- Select 300 DPI, or enter a whole number from 1 to 2400.
- Check the expected print size, change DPI, and download the verified file.
DPI versus pixels: what changes?
Image resolution metadata describes how many pixels fit into a printed inch—technically PPI, often called DPI in upload requirements. It does not change the number of pixels. For example, 3000 × 2400 pixels at 300 DPI corresponds to 10 × 8 inches. The same pixels at 150 DPI correspond to 20 × 16 inches.
If a requirement specifies both dimensions and DPI, first use the image resizer, then set the DPI here. See the A4 size guide for common print dimensions.
Metadata-only conversion, not upscaling
This tool edits JPEG JFIF/EXIF resolution fields or the PNG physical-pixel chunk. It leaves compressed image data untouched. A small image tagged 300 DPI is still a small image; no converter can create genuine detail by changing a number. Some applications ignore these tags and use their own print settings.
Need to inspect or remove hidden information? Use the metadata viewer or EXIF cleaner.
Frequently asked questions
How do I convert an image to 300 DPI?
Choose a JPG or PNG, select 300 DPI, and click Change DPI. Download the verified result. The pixel dimensions stay the same; only the print-resolution metadata changes.
Does changing DPI improve image quality?
No. Changing the DPI tag does not add pixels or recover detail. A 1200 × 1800 pixel image prints at 4 × 6 inches at 300 pixels per inch.
Will the converter remove private metadata?
No. EXIF data such as GPS, camera details, and orientation may remain. XMP and JPEG Photoshop/IPTC metadata are removed to avoid conflicting resolution settings. Use the EXIF cleaner if you want a privacy-focused export.
Which image formats are supported?
JPG and PNG, up to 40 MB. PNG stores density as whole pixels per metre, so its DPI value may differ from the requested value by less than 0.02 DPI. WebP, TIFF, HEIC, and PDF are not supported.