See the real format, file size, pixel dimensions, megapixels, DPI, colour space and colour profile of any image, which is useful before printing, uploading or publishing.
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Upload forms, print shops, app stores and content management systems all have rules about images: a maximum file size, minimum dimensions, a specific format, a certain DPI or colour profile. Your computer's file browser shows some of this, but rarely all of it, and it trusts the file extension even when the extension is wrong.
This image properties checker shows everything that matters in one panel. It detects the real format from the file's contents, reports the exact file size, pixel dimensions and megapixels, and reads the DPI, colour space, ICC colour profile, PNG bit depth and orientation. It runs in your browser, so you can check confidential files without uploading them.
What the file name says
photo.jpg
?
Is it really a JPEG? How big is it? Will it print sharply at A4?
What the checker shows
JPEG · 4032 × 3024 · 12.19 MP
2.84 MB
72 dpi tag, sRGB / Display P3 profile, orientation and every metadata block present.
Example values for a phone photo. Dimensions are shown as the image is displayed, with any EXIF rotation applied.
Drop a JPEG, PNG, HEIC, AVIF or TIFF file into the workspace above.
It lists the real format, file size in KB/MB and exact bytes, dimensions, megapixels, DPI, colour space, colour profile, bit depth and orientation.
Resize, compress or convert the file if it does not meet a site's or printer's requirements, using the related tools below.
| Pixel dimensions | Megapixels | Print at 300 DPI | Print at 150 DPI |
|---|---|---|---|
| 1200 × 1800 | 2.2 MP | 4 × 6 in (10 × 15 cm) | 8 × 12 in |
| 2400 × 3000 | 7.2 MP | 8 × 10 in (20 × 25 cm) | 16 × 20 in |
| 2480 × 3508 | 8.7 MP | A4 (21 × 29.7 cm) | A3 |
| 4032 × 3024 | 12.2 MP | 13.4 × 10 in (34 × 26 cm) | 26.9 × 20 in |
| 6000 × 4000 | 24 MP | 20 × 13.3 in (51 × 34 cm) | 40 × 26.7 in |
Pixel dimensions, width × height, are the most important property of an image. They decide how much detail it can hold, how large it can be printed and how sharp it looks on high-resolution screens. Multiply them and divide by a million to get megapixels: a 4032 × 3024 phone photo is about 12.2 MP.
The checker shows dimensions as the image is displayed. Many phone photos are stored sideways with an orientation flag; the panel applies that rotation so the numbers match what you see, and lists the orientation separately.
DPI (dots per inch), or PPI for screens, is a number stored in the metadata that tells printers how densely to place the pixels. It does not change the pixels themselves. A 3000-pixel-wide image prints 10 inches wide at 300 DPI or 20 inches wide at 150 DPI, with exactly the same data. On screens, DPI is ignored entirely.
This is why "72 DPI vs 300 DPI" causes so much confusion. If a form asks for 300 DPI, what usually matters is that the image has enough pixels for the intended print size at 300 DPI. The table above shows how pixel dimensions translate into print sizes.
A file extension is only a label, and it can be wrong. iPhones sometimes export HEIC images that end up named .jpg, websites serve WebP files with PNG names, and renaming a file never converts it. Upload systems that check the real contents will reject a mislabelled file with confusing errors.
The checker identifies the format from the file's first bytes, its signature, and warns when the extension disagrees. If it does, convert the file properly with a converter such as HEIC to JPG or PNG to JPG.
Colour numbers in an image only make sense with a reference. The EXIF colour space tag usually says sRGB or "Uncalibrated"; the ICC profile, when present, gives the precise definition, such as sRGB, Display P3 (common on recent phones) or Adobe RGB (common in professional cameras).
Phones usually save the sensor image in a single landscape layout and add an EXIF Orientation value telling viewers how to rotate it. A portrait photo might therefore be stored as 4032 × 3024 pixels with an instruction to rotate 90°. Browsers and modern apps apply the rotation, but some older software and upload systems read the stored dimensions instead, which is why a portrait photo can be reported as landscape or appear sideways after upload.
The checker shows the dimensions as displayed, with the rotation applied, and lists the orientation value separately so you can spot the issue. If a system keeps showing your photo sideways, re-saving it through a converter or the Rotator bakes the rotation into the pixels so every program sees the same orientation.
File size depends on dimensions, format, compression and content. The checker shows it rounded (KB or MB) and as an exact byte count, because some sites validate with 1,000-byte kilobytes and others with 1,024. If a file is too large, reduce the dimensions with the Image Resizer or hit an exact limit with the 100KB compressor.
Confirm a photo has enough pixels for the print size you want at 300 DPI.
Check format, dimensions and file size against job, exam or marketplace rules before submitting.
Verify colour profiles and dimensions for websites, app stores and design handoffs.
Find out whether a file is really the format its extension claims.
Drop it into the checker above. The File & Image Properties panel shows width × height in pixels and the megapixel count. Dimensions are shown as the image displays, with any EXIF rotation applied.
The Resolution row shows the DPI value stored in the file's metadata. It is only an instruction for printing: it does not change the pixels. To know how large a photo will print, divide its pixel dimensions by the DPI you plan to print at.
No. Changing the DPI tag alone does not add detail. Only the number of pixels determines how much detail an image holds. Some forms ask for a specific DPI; in that case, check the pixel dimensions they expect as well.
The checker reads the first bytes of the file, its "magic number", rather than trusting the extension. If a file named .jpg is really a PNG or HEIC, the panel shows both so you can convert it properly.
An ICC colour profile tells software how to interpret the colour numbers in the file. sRGB is the web standard; Display P3 and Adobe RGB cover wider ranges. A photo without a profile, or shown by software that ignores it, can look dull or oversaturated.
No. All properties are read in your browser and nothing is sent to a server.
Operating systems round sizes and some use 1,000-byte kilobytes while others use 1,024. The checker shows the exact byte count alongside the rounded value.
JPEG, PNG, HEIC/HEIF, AVIF and TIFF, up to 100 MB. WebP and GIF are not supported yet.
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