Image DPI Converter — Change DPI to 300 Online, Free
A free online DPI converter for JPG and PNG: set any image to 300 DPI, or any value, for printing. It runs in your browser, so your photo is never uploaded and its pixels stay untouched.
or drop a file here
Or paste an image (Ctrl/Cmd + V)
Works with JPG and PNG. iPhone photo (HEIC)? Set Settings → Camera → Formats → Most Compatible, or export it as JPG first. Free, no sign-up, and your image stays on your device. Nothing is uploaded.
Increase Image DPI Without Losing Quality
This DPI converter only rewrites the resolution value stored in your JPG or PNG. It does not resize, resample, or recompress the image, so every pixel stays exactly the same and the file size barely changes. That is how you increase the DPI of an image without losing quality: print software simply reads it at the DPI you chose, such as 300. You can also check an image's current DPI before you change it, with no software or Photoshop needed.
Convert 72 DPI to 300 DPI for Printing
Print shops, photo kiosks, and poster services often ask for 300 DPI, while phone photos and Canva downloads usually show 72 or 96. With this free 300 DPI converter, pick 300 and download: the file now reports 300 DPI, and the tool shows the size it will print at. For example, a 3000 × 2400 px image prints at 10 × 8 inches at 300 DPI. Enter your print size to check that the photo has enough pixels before you order.
Does Changing DPI Make an Image Higher Resolution?
No. DPI is a print instruction: it tells software how many pixels to place in each inch of paper. Raising it from 72 to 300 makes the same pixels print smaller and denser; it does not add pixels or detail. If your photo is too small for the print size you need, use our AI image upscaler to add real pixels. 2x is free up to 24 MP, and larger outputs show the credit cost before you start. For a screen-sized result, you can upscale to 4K instead.
How Many Pixels Do You Need to Print at 300 DPI?
Pixel dimensions (width × height) for common print sizes at 300 DPI, for photos viewed up close, and 150 DPI, for posters viewed from a few feet away.
| Print size | 300 DPI | 150 DPI |
|---|---|---|
| 4 × 6 in | 1200 × 1800 | 600 × 900 |
| 5 × 7 in | 1500 × 2100 | 750 × 1050 |
| 8 × 10 in | 2400 × 3000 | 1200 × 1500 |
| 11 × 14 in | 3300 × 4200 | 1650 × 2100 |
| 12 × 18 in | 3600 × 5400 | 1800 × 2700 |
| 16 × 20 in | 4800 × 6000 | 2400 × 3000 |
| 18 × 24 in | 5400 × 7200 | 2700 × 3600 |
| 24 × 36 in | 7200 × 10800 | 3600 × 5400 |
Each value is the print size in inches multiplied by the DPI, assuming your image has the same aspect ratio as the print. If it doesn't, you'll need to crop, so check your print shop's size and bleed requirements too.
How to Change an Image to 300 DPI Online
Change image to 300 DPI in three steps, all in your browser. No sign-up and no upload.
1. Choose a JPG or PNG
Drop or select your photo. The tool shows its pixel size and current DPI, so you can check DPI first.
2. Pick 300 DPI
Choose 300 to increase image DPI for print, or pick another preset or a custom value, and see the print size at that DPI.
3. Download the New File
Save the image with its new DPI. The DPI converter never changes your pixels, so if it needs more pixels for your print, upscale it with our AI image upscaler.
Image DPI Converter FAQ
Quick answers about 300 DPI, print sizes, file formats, and privacy.
300 DPI (dots per inch) means 300 pixels are printed in each inch of paper. At 300 DPI, an image 3000 pixels wide prints 10 inches wide. To increase image DPI to 300, pick 300 in the tool above and download; the pixels stay the same.
No. Changing DPI does not add pixels or detail; it only changes how large the image prints. That's also why an image can say 300 DPI and still look blurry: it doesn't have enough pixels for the print size. To make a small photo larger and clearer, upscale it with AI first, then set it to 300 DPI. A print shop may also check pixel dimensions, file format, color profile, and bleed, so confirm their requirements before you upload.
The DPI number alone doesn't decide print quality; the pixel count does. Divide the pixels by the print size: at 300 DPI or more, prints held in the hand look sharp. Posters seen from a few feet away usually look fine at 150 DPI, so an 18x24 poster needs about 2700 × 3600 pixels (5400 × 7200 at 300 DPI) and a 24x36 needs about 3600 × 5400 (7200 × 10800 at 300 DPI).
2400 × 3000 pixels. Other common sizes at 300 DPI: a 4x6 print needs 1200 × 1800, a 5x7 needs 1500 × 2100, and a 16x20 needs 4800 × 6000. Enter your print size in the DPI converter above to check any photo.
Yes. A typical 12 MP phone photo is 4032 × 3024 pixels, which prints at about 13.4 × 10.1 inches at 300 DPI. That covers 4x6, 5x7, and 8x10 prints.
Some apps read DPI from a different field or show a cached value. This tool updates the DPI everywhere it is stored in the file (and adds it if missing); open the downloaded file here to check it. On Windows, see Properties → Details; on a Mac, use Preview → Tools → Show Inspector; in Photoshop, use Image → Image Size.
Your photo is never uploaded. This 300 DPI converter runs entirely in your browser, is free, and needs no sign-up. An image is only sent to our servers if you choose to upscale it.
JPG and PNG. iPhone photos are often HEIC: set Settings → Camera → Formats → Most Compatible, or export the photo as JPG first. WebP has no standard DPI field, so save it as JPG or PNG. PDF files are not supported.
Canva's image downloads are made for screens, so they often show a low DPI such as 72. Download your design as PNG or JPG, then set it to 300 DPI here.
PPI (pixels per inch) describes the pixels in a digital image, while DPI (dots per inch) describes the ink dots a printer lays down. Print shops use the two the same way, so 300 PPI and 300 DPI are the same request.