Change Image DPI
Stamp 72, 150, or 300 DPI (or a custom value) onto JPEG JFIF / PNG pHYs metadata. Pixel dimensions stay the same — only print density changes.
Drag & drop your file here, or choose a source
Stamp print DPI on JPEG (JFIF) or PNG (pHYs)
Computer · URL · Box · Dropbox · Google Drive · OneDrive
Does not resize pixels — only updates density metadata for print apps.
How to use this tool
Select JPG or PNG
File is read as a Blob in your browser.
Pick a DPI
Common print targets: 72, 150, or 300.
Download
Density metadata is written locally into the new file.
Frequently Asked Questions
More on quality loss: conversion quality guides · compression guides
Does changing DPI resize the image?
No. This tool updates density metadata only. Use the image resizer to change pixel width/height.
Does WebP support DPI?
WebP has no standard DPI field. The tool can re-encode WebP but cannot store print DPI.
Does compressing or converting images reduce quality?
Lossy compression can. Use higher quality settings when fidelity matters, and keep an original master. Lossless workflows preserve pixels.
Can you recover quality after compressing?
Not from the compressed file alone. Keep the original upload/export and recompress from that master if you need a better result.
What is generational loss?
Quality damage from repeatedly re-encoding lossy images. Avoid save→compress→save loops; work from a master.
Ready to convert more formats?
Browse converters or jump back to the tool above.