Change image DPI without touching pixels
72, 150, 300 or 600 — the print label changes, the image stays identical. Never uploaded.
Drop JPG or PNG files here or click to browse
Only the DPI metadata changes — pixels stay untouched. Nothing is uploaded.
DPI is a label, and sometimes the label is all that matters
Phone cameras save photos at 72 DPI. That number means nothing on screens, but application portals, academic journals and print shops check it anyway — and reject files below their threshold. Re-encoding the image to fix a two-byte metadata field is absurd, so this tool does the honest thing: it rewrites the density field (JFIF header in JPG, pHYs chunk in PNG) and leaves every pixel exactly as it was. Need more pixels, not just a different label? That's a job for the AI upscaler.
Frequently asked questions
How do I change an image to 300 DPI?
Drop the JPG or PNG above, pick 300, download. The tool rewrites only the density metadata — the print-resolution instruction stored inside the file — which is exactly what portals and print shops check.
Does changing DPI change my image quality or size?
No. DPI is a label, not pixels: a 3000×2000 photo has the same pixels at 72 or 300 DPI. Only the few bytes that state “dots per inch” are rewritten; the image data passes through untouched.
Why does a form reject my photo for being 72 DPI?
Upload forms for passports, journals and print services often read the DPI field literally and refuse anything under their threshold, even when the pixel count is more than enough. Setting the field to their number satisfies the check.
What DPI do I need for printing?
300 DPI is the print-industry standard for sharp results; 150 works for large-format posters viewed at a distance; 600 is for fine art and line drawings. For screens, DPI is irrelevant — only pixels matter.
Is my photo uploaded?
No. The metadata rewrite happens in your browser in milliseconds. Your photo never leaves your device.