How to check image size online
Use this image dimensions checker to read a photo, screenshot, or graphic without opening a design app. Your selected files are inspected in your browser.
Choose your images
Drag files into the tool or click “Choose images.” You can select up to 20 images, or try the sample to see how the results work.
Read width, height, and file size
Select an image in the results list. Dimensions are shown as width × height in pixels. HEIC/HEIF dimensions are read directly from the original file; other formats are decoded by your browser. The details also include file size, format, aspect ratio, megapixels, and the file name.
Compare with the requirements
Check the numbers against your upload form or client brief. Select another file to review its details, and use “Add” to continue checking the batch.
A real example: the sample image’s dimensions and file size
Choose “Try a sample” to inspect sample-red-panda.webp: 1024 × 1024 px, 159.15 KiB (162,970 bytes), WebP, a 1:1 aspect ratio, and 1.05 MP (1,048,576 pixels, rounded to two decimal places in MP).
Verified on October 8, 2026: the sample’s dimensions and byte count were independently cross-checked. Use the sample button above to repeat the check.
Image dimensions vs. file size: which number do you need?
“Image size” can mean the space a picture takes up in pixels or the storage space its file uses. This tool works as both an image dimensions checker and an image file size checker, so you can check the two separately.
| Result | What it means | When to check it |
|---|---|---|
| Dimensions (px) | Width × height in pixels, such as 2400 × 1600 px. | An upload form or design brief specifies a width and height. |
| File size (B, KiB, MiB) | The storage size of the selected file, with its exact byte count. | A photo must fit under a KB or MB upload limit. |
| Aspect ratio | The relationship between width and height, such as 3:2 or 1:1. | You need a square product photo or a particular crop shape. |
| Pixel count (MP) | Width multiplied by height; one megapixel is one million pixels. | You want to compare the total pixel counts of different images. |
| Format | The detected file type, such as JPEG, PNG, or WebP. | The destination accepts only certain image formats. |
Checking photo size in KB or MB?
The result uses binary units: 1 KiB is 1,024 bytes and 1 MiB is 1,048,576 bytes. Decimal KB and MB mean 1,000 and 1,000,000 bytes. If an upload limit is close, compare the exact byte count with the destination’s stated limit.
Check your image before uploading
A picture can have the right dimensions and still exceed a file size limit. For example, suppose a form asks for a 1200 × 1200 px image under 2 MB. A square image with those dimensions but a file size of 3 MiB meets the pixel requirement and exceeds the storage limit. These are example requirements, not a platform standard.
Product photos and client deliveries
Add a batch of product images or final exports, then select each file to check dimensions and aspect ratio against the brief. The tool shows the measurements; you make the comparison.
Website and social media images
Check the saved asset’s width and height before placing it in a page or scheduling a post. Use the destination’s current requirements as your reference; the file’s pixel dimensions do not tell you how large it will appear on screen.
Compress an image that exceeds the file size limit
For JPG or WebP images with the right dimensions, try the image compressor, then check the exported file again.
Wrong dimensions or crop?
Resize when you need different pixel dimensions; crop when you need to change the framing or aspect ratio. If the original has too few pixels, look for a larger source image before enlarging it.
Make an image square
If the destination requires a 1:1 image, use the square image tool to crop it or keep the whole picture with padding. Check the exported file again for its dimensions and file size.
Crop a batch of images
If several images need a different crop, use the batch cropper to apply a crop across the set and fine-tune individual images. Check the exported files again against your brief.
Calculate print size from pixel dimensions
Print size in inches = pixel dimensions ÷ pixels per inch (PPI). A 3000 × 2400 px photo gives 10 × 8 inches at 300 PPI. This is a calculation at your chosen PPI, not a reading of the file’s embedded DPI metadata or a guarantee of print sharpness.
Adobe explains pixel dimensions and print resolution in its image size and resolution guide. This checker supplies the dimensions; use your printer’s requirements to choose a PPI value.