Free DPI changer
DPI Changer
Set your image to 300 DPI without touching a single pixel.
Reading the file…
Drop your file
Drop an image here. Let it go, we have it.
PNG or JPG up to 40 MB. Your file never leaves this page, and your pixels are never touched.
or paste from your clipboard
Your file
Same file, same pixels, new label.
Retagging works for PNG and JPG. Convert this file to PNG first.
The truth about print size
Size
Effective DPI
Status
DPI is a label that tells printers how large to render your pixels. Changing it never changes quality. 300 DPI is the print standard, 150 DPI is acceptable for large soft artwork.
How DPI actually works
01
DPI is a label, not quality
A 3,600 pixel file is the same file at 72 or 300 DPI. The tag only tells print software how large to render it. That is why we can fix it without re-encoding.
02
Pixels divided by inches
Print quality is pixel dimensions divided by print size. 3,600 pixels across a 12 inch print is 300 DPI. The table on this page does that math for every common size.
03
Upscaling is a trap
Software that invents pixels to hit 300 DPI produces soft, blurry prints. If the table says a size is too small, sell the sizes your file supports.
Image DPI, answered
How do I change an image to 300 DPI?
Drop your PNG or JPG on this page, choose 300 DPI, and download. The tool rewrites only the DPI label inside the file, in your browser, without re-encoding or recompressing anything. Your pixels come out exactly as they went in.
Does changing DPI reduce image quality?
Not here. DPI is a metadata label that tells print software how large to render your pixels. This tool changes the label and nothing else. Tools that resample your image to change DPI can reduce quality, which is why we never do it.
Why does my print shop say my file is not 300 DPI?
Most design and AI tools export files tagged 72 or 96 DPI even when they contain plenty of pixels. Buyers of digital downloads check that tag in their file properties, image editors size the file by it, and print software uses it to set the default print size, so a mislabeled file draws complaints even when the pixels are fine. Print on demand platforms like Amazon KDP judge quality from your pixels divided by the print size instead, which is exactly what the table on this page shows. Fix the label here, then confirm your size reads clean in the table.
Can this tool upscale my image to 300 DPI?
No, on purpose. If your file does not have enough pixels for a size, upscaling invents detail that does not exist and prints soft. The table shows the largest sizes your file genuinely supports, so you can sell those with confidence.
Does my image get uploaded?
No. The file is read and rewritten entirely in your browser, nothing is stored, and you do not need an account.
More free seller tools: the DPI calculator for working out pixel targets, the Pattern Proofer and the Etsy fee calculator.
SecondStream
A correct file is step one.
Art that sells is the system.