Change the metadata, not the pixels
- Choose a PNG or JPEG image.
- Enter the DPI value required by your print or layout workflow.
- Download the rewritten file and confirm physical print size from the unchanged pixel dimensions.
Change Image DPI Metadata
Change JPEG or PNG DPI metadata without resizing or adding pixels, then download the same encoded image data with updated print-resolution metadata.
Some print, layout, and submission workflows expect a specific DPI metadata value even when the underlying pixels are already correct. This tool changes that metadata tag without pretending that 72 DPI to 300 DPI creates new image detail.
How OpenFileTools processes it
Local processing, explicit choices.
OpenFileTools rewrites the PNG pHYs density chunk or JPEG JFIF density field and compatible existing EXIF resolution fields locally while keeping the compressed pixel payload unchanged.
Questions, answered.
Will changing 72 DPI to 300 DPI improve quality?
No. It changes the intended physical-density metadata only. Real print detail still comes from pixel dimensions divided by print size.
Does this resize my image?
No. Width, height, and encoded image pixels remain unchanged.
Related guide
Read the related guide