Free DPI Checker: Check Image DPI Online in Seconds
Need to know if your photo is 300 DPI before you send it off to print? Our free DPI checker reads the DPI of an image the moment you drop it in, along with its pixel size and whether it’s ready for printing. No sign-up, no uploads and no guesswork.
It’s a simple online DPI checker (some people call it a DPI tester or DPI finder) that works with JPG, JPEG, PNG, WEBP, BMP and GIF files. Check as many images as you like in one go. Your files stay on your device the whole time, because everything happens right inside your browser.
🔍 Check Image DPI
Upload an image to instantly see its DPI, pixel dimensions, and print-readiness. Everything happens in your browser — nothing is uploaded anywhere.
Note: some images simply don’t carry any embedded DPI value (common for screenshots, WebP, and GIFs) — that’s shown as “Not specified” rather than a guess. “Download All (ZIP)” gives you a CSV report of all results, not modified images (this tool never changes your files).
How to Check DPI of Image (Step by Step)
If you’ve ever wondered how to check the DPI of an image, how to check image DPI for print, or how to check photo DPI before an upload, it only takes a few clicks with our image DPI checker:
- Add your image: Drag and drop it into the box above, or click to browse your files. You can add several pictures at once.
- Click “Check DPI”: The tool instantly reads the information stored inside each file.
- See your results: You’ll get the DPI, the pixel dimensions and a colour-coded label that tells you if the image is print ready.
- Save a report (optional): Use “Download All” to get a handy CSV report of every image you checked.
That’s it. This is the easiest way to check image DPI, check photo DPI or check the DPI of an image you got from a client. Your original images are never changed, so you can check DPI of image files as often as you like. It’s also the quickest answer to how to check picture DPI or how to check DPI of photo files straight from your camera.
How to Find the DPI of an Image (and Why It Matters)
People ask this in lots of different ways: how to find DPI of image files, how to tell DPI of image downloads, how to know DPI of image scans, or simply how to see DPI. Some want to know how to find image DPI for a print order, while others ask how to tell the DPI of an image or how to see the DPI of an image they downloaded. Whatever you call it, the goal is the same: you want to view DPI of image files before you print, upload or send them.
The DPI tells printers how big your picture will print and how sharp it will look. If you know how to determine DPI of an image (or how to know DPI of an image at a glance), you can avoid blurry prints, rejected uploads and wasted paper. With our DPI detector, you don’t need to determine DPI of image files by hand: just drop the file in and the answer appears.
What Your DPI Results Mean
Every image gets a simple label, so you can tell at a glance whether it’s good to go:
| Label | DPI | What it means |
|---|---|---|
| Print Ready | 300 DPI or more | Perfect for photos, flyers, books and professional printing. |
| Screen | 96 to 299 DPI | Fine for websites, slides and everyday home printing. |
| Low | Below 96 DPI | Typical of web graphics. May look soft or blurry when printed. |
| Not specified | No DPI saved | The file simply doesn’t carry a DPI value. Common for screenshots, WEBP and GIF images. |
Your image shows “Low” or “Not specified”: No worries. Head over to our free DPI converter and change it to 300 DPI in a few seconds.
How to Tell If an Image Is High Resolution
DPI is only half the story. If you want to know how to tell if an image is high resolution, you also need to look at its pixel dimensions. A photo can say 300 DPI and still be tiny if it only has a few hundred pixels. That’s why our tool also works as an image resolution checker and shows the width and height of every file, so you can find image resolution and DPI together.
Here’s how to figure out DPI and print size yourself: divide the pixel width by the DPI and you’ll get the print width in inches. For example, an image that’s 3000 pixels wide at 300 DPI will print 10 inches wide with crisp, clear detail. And that’s really how to work out DPI for any print job.
As a quick guide, here’s what a high resolution image usually needs:
- 4 × 6 inch print: at least 1200 × 1800 pixels at 300 DPI
- 8 × 10 inch print: at least 2400 × 3000 pixels at 300 DPI
- A4 page: at least 2480 × 3508 pixels at 300 DPI
- Websites and social media: 1080 to 2000 pixels wide is usually plenty, whatever the DPI
So, how to check if an image is high resolution? Check the resolution of an image here, compare its pixels with the list above, and look for the green “Print Ready” label. That’s also how to know if an image is 300 DPI, and how to check image resolution for any photo in seconds.
Other Ways to Find the DPI of an Image
Our online DPI checker is the fastest option, but here’s how to check DPI on your own device too:
- Windows: Right-click the image, choose Properties, open the Details tab and look for “Horizontal resolution”. That number is the DPI.
- Mac: Open the image in Preview, go to Tools › Show Inspector and check “Image DPI” in the General Info tab.
- Photoshop: Go to Image › Image Size. The “Resolution” field shows the DPI in pixels per inch.
- iPhone and Android: Phone galleries don’t show DPI, so the simplest answer to how to check DPI of image on phone is to open this page in your browser and upload it here.
How to Check DPI of PDF Files
Our tool is made for image files, so it can’t read PDFs directly yet. If you’re wondering how to check the DPI of a PDF, Adobe Acrobat Pro works as a PDF DPI checker through its Preflight feature (under Print Production), which lists the resolution of every image inside the document.
There’s also a simpler way to determine DPI of PDF files: a PDF’s print quality depends on the pictures placed inside it. If you still have those original images, check them here first. If they’re 300 DPI with enough pixels, your PDF will print beautifully too.
DPI vs PPI: Is There a Difference?
DPI means dots per inch and describes the ink dots a printer puts on paper. PPI means pixels per inch and describes pixels in a digital image. Technically they’re different, but in everyday use people treat them as the same thing. So if you’re wondering how to check the PPI of an image, our checker shows you that number too. When a print shop asks for 300 PPI, a 300 DPI image is exactly what they want.
Why Use Our Image DPI Checker
- 100% free: Check DPI online for unlimited images without signing up or paying a thing.
- Private and secure: Your images are read in your browser and never uploaded anywhere.
- Honest results: If a file has no DPI saved, we tell you “Not specified” instead of making up a number.
- Print-readiness at a glance: Colour-coded labels show instantly if an image is ready for print.
- Check many at once: Drop in a whole batch and download a CSV report of the results.
- Works on any device: A DPI checker online, and a handy DPI analyzer website to bookmark, that runs on Windows, Mac, Android, iPhone or Chromebook.
Go ahead, drop your image into the checker above and find out its DPI in seconds.
Frequently Asked Questions
How do I check the DPI of an image?
Upload your picture to the DPI checker at the top of this page and click “Check DPI”. You’ll see the DPI, pixel size and print-readiness straight away.
How do I find the DPI of an image on Windows or Mac?
On Windows, right-click the file, open Properties › Details and look at “Horizontal resolution”. On a Mac, open it in Preview and use Tools › Show Inspector. Or just drop it into our tool for an instant answer.
How do you find out the DPI of an image on a phone?
Open this page in your phone’s browser, tap the upload box and choose your photo. Our checker works on Android and iPhone, with no app to install.
How do I know if a photo is high resolution?
Here’s how to know if a photo is high resolution: check both its DPI and its pixel size. A photo at 300 DPI with enough pixels for your print size (for example 2400 × 3000 pixels for an 8 × 10 print) is high resolution.
How can you tell if a picture is high resolution just by looking?
Zoom in to 100%. If edges look sharp and you can’t see blocky pixels, it’s probably high resolution. For a reliable answer, check the resolution of image files with our tool.
How to tell if an image is 300 DPI?
Upload it here. If the result shows 300 DPI or more, you’ll see a green “Print Ready” label, which means it’s good for professional printing.
What is the DPI of my image if it says “Not specified”?
Some files, like screenshots, WEBP and GIF images, don’t store a DPI value at all. Most programs then treat them as 72 or 96 DPI. You can set a proper DPI with our free DPI converter.
Does checking the DPI change my image?
No. Our checker only reads the file information. Your image isn’t edited, compressed or saved anywhere.
What DPI is best for printing?
300 DPI is the standard for sharp, professional prints. For large posters seen from a distance, 150 to 200 DPI is usually fine.
Can I check DPI of a PDF here?
Not right now. This tool works with JPG, PNG, WEBP, BMP and GIF images. For PDFs, Adobe Acrobat Pro’s Preflight feature is the best answer to how to check PDF DPI, as it shows the resolution of the images inside.
Is this a mouse DPI tester?
No. This tool checks the DPI of images and photos. Mouse DPI testing is a different thing that measures how sensitive your computer mouse is.
How do I check my DPI for printing?
Upload your file to the checker above. If it shows 300 DPI or more with the “Print Ready” label, it’s good to go. If not, you can fix it in seconds with our free DPI converter.
How do you figure out DPI of a photo yourself?
Divide the image’s pixel width by the width you want to print in inches. For example, 2400 pixels printed 8 inches wide gives you 300 DPI.
How can I tell if an image is high resolution?
Look at the pixel size as well as the DPI. That’s how to check if a photo is high resolution, and how to tell if a picture is high resolution before you print. Our tool shows both, so you’ll know if a picture is high resolution in seconds.
How to check photo resolution online for free?
Use our image resolution checker. You can check photo resolution, check resolution of image files and check image resolution online, all for free. It answers “what is the resolution of this image” with the exact width, height and DPI. If you’re wondering how to check resolution of image files on a computer, Windows Properties shows the pixel size too.