DPI Converter

Select the image above, choose 2x or 4x, leave the DPI on 300 and press Upscale. The DPI converter writes 300 DPI into the downloaded PNG or JPG. At the same DPI, the 2x or 4x output prints two or four times larger on each side than the original.

Not on its own. Changing only the DPI number leaves every pixel as it was and just makes the print smaller. Quality on paper comes from having enough pixels, which is why this DPI converter upscales the image at the same time.

Divide each side in pixels by 300. A 1500 x 2100 image prints at 5 x 7 inches. Once you select an image, the page does this sum for you and shows the inches for the output and DPI you picked.

Use whatever your printer or form asks for. Some print guides suggest 300 for photo prints, 150 for posters seen from a distance and 600 for line art, and 72 is a common screen default. This DPI converter writes the number you pick; it does not judge whether a print will look good.

Raising the DPI number alone loses nothing, but it shrinks the print. To keep the print size and raise DPI, you need more pixels. AI upscaling makes those pixels with sharper edges than simple resampling, though they are estimated, so check fine details before printing.

No. This DPI converter always enlarges the image 2x or 4x with AI while it writes the DPI. If your pixels must stay exactly as they are, use a metadata-only DPI converter instead.

This DPI converter works the same in any modern browser on all three, since everything runs locally. On iPhone, export the photo as JPG first because HEIC isn't supported, and pick 2x if 4x is too large for the device.

Yes. JPG, PNG and WebP up to 20 MB go in. The result comes out as PNG by default, which keeps a transparent background, or as JPG if you turn on Save as JPG for a much smaller file. Both carry the DPI you chose.

This DPI converter writes your chosen DPI into the new PNG or JPG download. If an app still shows another value, check that you opened the downloaded file and look at the app's own import or document settings. A pixel size 2x or 4x the original tells you it is the new file.

Many say so, but most also list a pixel size or file size, and those usually decide whether the file is accepted. Set 300 here, then check the width, height and KB against the rules. JPG output keeps the file smaller.

No, the DPI converter handles one image at a time. Each run usually takes a few seconds on a normal laptop: in our test a 382 x 512 photo took about 4 seconds at 2x and 6 seconds at 4x. Then select the next image.

Usually a few seconds on a laptop; the first visit is slower while the model downloads. There is no limit on how many images you convert, only on output size: about 50 million pixels on a computer and 16.7 million on iPhone or iPad.