PPI Checker - Image Resolution Checker
Check the PPI of any image, set the print size you need, and see straight away whether it will print sharp.
or browse filesdrop an image here or paste
Check the PPI of any image, set the print size you need, and see straight away whether it will print sharp.
or browse filesdrop an image here or paste
It is a tool that answers one question: does this image hold enough detail to print at the size you want. Drop a photo on this page and the PPI appears immediately, along with a plain verdict. To find the PPI of a picture you need two things, its pixel width and the width it will be printed at, because PPI means pixels per inch: the same 4000 pixel wide photo is 500 PPI on a postcard and 80 PPI on a poster. Type the print size you need, or drag the slider, and the number updates as you go. Treat it as a resolution test and a print quality tester in one, run before you send anything to a printer. Everything happens in your browser and no file is uploaded.
Load the file, set the print width, read the number. That is the whole method, and it is the only one that tells you anything real, because PPI is a ratio and not a property an image carries on its own.
If the file does carry its own resolution setting, the tool starts there, so a picture saved at 300 PPI opens showing 300 and the print size that value implies. That is the same number Photoshop reports in Image Size, read straight out of the file: the JFIF density block or EXIF XResolution tag of a JPG, the pHYs chunk of a PNG, the EXIF chunk of a WebP. You will find it under the info button on the image, next to the resolution, megapixels and file size. Files without any tag start at a six inch print, the most common photo size there is.
The verdict under the number follows the thresholds print shops use. At 300 PPI and above the result is excellent, the standard for photo prints, magazines and anything held in the hand. From 150 to 299 PPI the print is good for most purposes, including large photo prints and canvas. From 100 to 149 PPI quality is acceptable for banners, signs and posters that are viewed from a few steps back. Below 100 PPI, pixels become visible and the image is not really printable at that size.
Viewing distance is the reason the lower bands are usable at all. A billboard printed at 20 PPI looks perfect from across a street, because your eye cannot resolve the pixels at that range. The rule of thumb is simple: the closer someone stands, the more PPI you need.
The two rows under the size control answer the question in reverse. They give the biggest print the image can fill at 300 PPI and at 150 PPI, calculated from the pixel dimensions alone, so you can see the ceiling before choosing a frame or a canvas. A 12 megapixel phone photo, for example, reaches roughly 13 by 10 inches at 300 PPI and double that at 150 PPI.
The arithmetic in both directions is the same one line. Pixels divided by inches gives the PPI; pixels divided by the PPI you want gives the inches. Switch the unit to centimetres and every figure on the panel switches with it.
| PPI range | Quality | Best for |
|---|---|---|
| 300 and above | Excellent | Professional photo prints, magazines, brochures, photo books |
| 150 to 299 | Good | Large posters, canvas prints, casual photo prints |
| 100 to 149 | Acceptable | Banners, signs, large format prints viewed from a distance |
| Below 100 | Too low | Not recommended for printing, pixels may be visible |
Before ordering a print, uploading to a print on demand service, sending artwork to a printer, or accepting a photo from someone else for anything that will end up on paper. It is also the fastest way to settle the 72 versus 300 argument: a file tagged 72 PPI is not automatically a bad file. A 6000 pixel wide photo tagged 72 still prints beautifully at 20 inches; the tag is simply wrong about the intended size. What decides quality is pixels divided by inches, which is exactly what the big number here reports. If you need to correct the value written into the file itself, the DPI checker and converter rewrites it without touching a single pixel.
When the image falls short there are only two honest routes. Print it smaller, or start from a bigger original: rescanning, reshooting, or exporting again at full size. Enlarging pixels in a resizer makes the file bigger without adding real detail, which is why the PPI here is computed from the true pixel count and nothing else. For the raw dimensions, file size and megapixels on their own, the image size finder covers that ground.
Load the image here and read the number. Because PPI only exists relative to a print size, set the width you plan to print at and the tool divides the pixel width by it. That is all it takes to tell how many PPI a picture has, and to know whether it holds up at the size you want. The resolution recorded inside the file is shown too, under the info button on the picture.
PPI is pixels per inch in an image, DPI is dots per inch that a printer puts on paper. A printer usually lays down many tiny dots for each image pixel, so its DPI figure is far higher than the image PPI. In web tools and image editors the two terms are used interchangeably, and the value stored in a JPG or PNG is the same field either way.
300 PPI is the safe standard for photos, art prints and anything examined closely. 150 PPI is fine for larger prints seen from a metre away, and 100 PPI works for banners and signage. Below 100 PPI the pixels start to show.
Photoshop displays the resolution tag stored in the file, which many cameras and exports set to 72 or leave blank; an iPhone photo, for instance, arrives tagged 72 PPI no matter how much detail it holds. That tag says nothing about the real quality. This page shows both: the stored value in the details panel, and the density you actually get at whatever print size you choose. Checking the resolution that way is the only reliable method to determine what a file can print.
You can change the number, but not the detail. Rewriting the tag to 300 makes the file claim a smaller print size; upscaling adds pixels that were interpolated rather than captured. The only genuine fix is a higher resolution original.
No. The file is read and measured entirely in your browser on your own device, and nothing is sent to a server or stored.