Drop a JPG or PNG here or click to browse
JPG or PNG only · stays on your device
DPI
How to Change an Image's DPI
Three steps, all in your browser.
1
Add a JPG or PNG
Drag a file onto the drop zone or click to browse. The file is read locally and never leaves your device.
2
Pick the DPI
Choose 72, 150 or 300 — or type a custom value. The print-size readout shows how large the same pixels will print in inches and centimetres.
3
Set DPI and download
Click Set DPI & download to save the file with its new density tag. The pixels are untouched — to change the actual pixel size, use the Image Resizer.
This changes the print-resolution tag only, not the pixels. To make the file smaller in bytes, use the Image Compressor; to crop it, use the Image Cropper.
Frequently Asked Questions
Does this upload my image?
No — the DPI is changed entirely in your browser. The file's bytes are read locally, the density tag is rewritten on your own device, and the new file is downloaded directly — nothing is ever sent to a server, logged or stored. It keeps working offline once the page has loaded, and closing the tab clears everything.
Does changing DPI change the image quality or pixel size?
No — this tool only rewrites the print-resolution tag inside the file; it does not resample or re-encode the pixels. The image keeps exactly the same pixel dimensions and quality. What changes is how large the image prints: at a higher DPI the same pixels print smaller and sharper.
Why do printers ask for 300 DPI?
300 DPI (dots per inch) is the standard for sharp photo and document printing — at that density the individual pixels are too small for the eye to see. 72 DPI is a screen-era default and prints larger and softer. Set 300 for print, and check the print-size readout to see how big the image will come out on paper.
What is the difference between DPI and pixels?
Pixels are the actual image data — how many dots make up the picture. DPI is just a label saying how many of those pixels to pack into each printed inch. A 3000 × 2000 pixel photo is always 3000 × 2000 pixels; at 300 DPI it prints 10 × 6.7 inches, and at 150 DPI the same pixels print 20 × 13.3 inches.
Which formats are supported?
JPG and PNG. For a JPG the tool sets the JFIF density in dots per inch; for a PNG it writes a pHYs chunk (pixels per metre). Other formats such as WebP and GIF do not carry a standard DPI tag, so they are not supported here.
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