Convert an image to 300 DPI for free, with no watermark and no sign-up. This 300 DPI converter for printing runs entirely in your browser, so your files never leave your device. Load a JPG or PNG, choose a print size such as A4, 30×40 cm or 8×10 inches, and the tool tells you the real print size of your pixels, resamples the image, and writes a genuine 300 DPI tag into the file — plus a single-page PDF at the exact print size and an optional version compressed under Etsy's 20 MB limit.
Drop a JPG or PNG into the upload area. The tool reads its pixel size and any DPI tag already stored in the file.
Pick a print size — A4, A3, 30×40 cm, 50×70 cm, 8×10 in, 18×24 in or your own — and check the coloured verdict card: enough, borderline or too low.
Download the resampled image with a real 300 DPI tag inside, or the print-ready PDF at the exact page size.
DPI (dots per inch) is not stored in your pixels. It is a small note inside the file that says “print each inch of paper using this many pixels”. A 1000 × 1000 px image tagged 72 DPI and the same image tagged 300 DPI contain exactly the same data; only the printing instruction differs. At 72 DPI it would be printed 35 cm wide and look soft, at 300 DPI it prints 8.5 cm wide and looks crisp.
So changing the tag never adds sharpness. What decides print quality is how many pixels you have for the size you want to print: about 118 pixels per centimetre, or 300 per inch. If a 1000 × 1000 px file is stretched to a 30 × 30 cm poster, it lands near 85 DPI and will look blurry no matter what the tag says.
The tag still matters in practice. Etsy, Printify, Printful, Redbubble and most print shops read it, and files marked 72 DPI are often rejected or flagged automatically. That is why this tool does both: it writes a real 300 DPI tag into the file so it passes those checks, and it shows you honestly whether your pixel count actually supports the print size you chose. Upscaling is offered because some marketplaces require exact pixel dimensions — but it only interpolates new pixels, it does not recover detail that was never in the photo.
Drop your JPG or PNG into the tool, pick the print size you want (A4, 30x40 cm, 8x10 in or a custom size), then download the result. The file is resampled to the pixel size that print needs and a real 300 DPI tag is written into the file itself, so Etsy, Printify, Printful and print shops read it as a 300 DPI file.
No, and any tool that promises it is misleading you. DPI is only a label that tells the printer how big to print each pixel. Sharpness comes from the number of pixels you already have. Changing the label from 72 to 300 makes the file pass upload checks, but it cannot invent detail that was never captured.
No. The image is decoded, resampled and re-encoded entirely inside your browser with canvas, and the DPI bytes are written on your device too. Your files never leave your device and nothing is stored anywhere.
Divide each pixel dimension by 300 to get inches. A 3000 x 4000 px photo prints at 10 x 13.3 inches, which is about 25.4 x 33.9 cm. The tool shows this number for you as soon as you load a file, together with a check of whether your pixels are enough for the print size you selected.
Etsy digital downloads are capped at 20 MB per file, and buyers expect a print-ready 300 DPI file. Turn on the compress option and the tool lowers JPEG quality step by step until the file fits under 20 MB, keeping the 300 DPI tag and the full pixel dimensions.