DPI Calculator

Metadata-only change

Change image DPI without changing its pixels

Set the print-density tag in a JPEG or PNG. Preview the resulting print size, then download a copy. This does not add detail or sharpen the image.

LOCAL DPI EDITORNo image upload · no account

New embedded density

BEFORE → AFTER

—pixels stay unchanged

Current tag
Choose an image
New tag
300 PPI
Suggested print size after change
—

Changing this tag affects the suggested physical size. It cannot make a low-resolution image suitable for a larger print.

IMPORTANT DISTINCTION

Changing DPI metadata is different from resampling.

A 3000-pixel-wide image tagged 300 PPI has a suggested default width of 10 inches. The same image tagged 150 PPI suggests a width of 20 inches. Both files contain the exact same 3000 pixels across.

This tool edits the density tag without re-encoding the compressed image pixels. If your print project needs more pixels, use our print size calculator to find the required dimensions before deciding whether to resample or source higher-resolution artwork.

WORKFLOW GUIDE

Checking a print-on-demand resolution warning

First compare your image’s pixel dimensions with the provider’s required print area. Requirements vary by product and provider; some recommend 150 PPI while paper prints may call for 300 PPI.

If the file has enough pixels at the final placed size but its embedded tag is different, changing metadata may help with a tag-specific request. A metadata edit cannot fix a genuinely low-resolution image or guarantee upload acceptance.

Workflow: Check effective PPI in the print fit calculator, review the provider’s current template, then use the converter above only if you need a different embedded density tag. The pixel dimensions stay unchanged.

DPI CHANGER FAQ

Frequently asked questions about DPI conversion

Does changing DPI metadata degrade or recompress my image?

No. Our converter performs a metadata-only edit. It updates the numerical density tag in the file header (JFIF/EXIF for JPEG or pHYs for PNG) without decoding, recompressing, or resampling the underlying image pixels. Image quality is 100% preserved.

Will changing a 72 PPI tag satisfy a print service’s resolution requirement?

That depends on the service and its print area. A metadata edit changes the file’s density tag but cannot add pixels. Check the service’s current file guidelines and use effective PPI at the final placed size before submitting.

Can converting to 300 DPI make a small web photo print sharply?

No. Changing the DPI tag does not add new pixels. A 500 × 500 pixel image converted to 300 DPI will only print sharply at 1.67 × 1.67 inches. To print larger, you must source higher-resolution original photography or illustration files.

Which file formats are supported for local DPI changing?

This utility supports JPEG (.jpg, .jpeg) and PNG (.png) files up to 50 MB. Processing is performed instantaneously in your browser without uploading files to external servers or cloud services.

More questions answered →