Pixel dimensions
See exact width and height in pixels, such as 1200 x 630, without opening design software.
Fast image dimensions and file size check
Image Size Checker
Upload or paste an image to see its exact pixel dimensions, file size, format, ratio, megapixels, and orientation. No image upload required.
- Runs in your browser
- No account needed
- Copy-ready results
Choose an image
Get dimensions, file size, format, ratio, and orientation instantly.
Tip: press Ctrl+V or Cmd+V after copying an image
Ready for JPG, PNG, WebP, GIF, SVG, AVIF, BMP, and more.
Dimensions-
File Size-
Aspect Ratio-
Format-
Megapixels-
Orientation-
What This Image Size Checker Shows
Image size can mean several things: pixel dimensions, file weight, format, or display ratio. This browser-based checker gives you the measurements people usually need before publishing, uploading, or handing off an image.
File size
Check whether an image is light enough for a website, email, CMS, marketplace, or form upload.
Format and ratio
Confirm JPG, PNG, WebP, GIF, SVG, AVIF, or BMP and get a simplified aspect ratio like 1:1 or 16:9.
Megapixels and orientation
Use megapixels and landscape, portrait, or square orientation to judge fit before resizing or cropping.
How to Read Image Size Correctly
For most web work, three numbers matter most: pixel dimensions, file size, and aspect ratio. Read them together instead of treating one number as the whole answer.
Dimensions control visual detail
A 1200 x 630 image has enough pixels for a social preview. A 300 x 158 image has the same ratio, but it will look soft when enlarged.
File size affects loading speed
Large files can slow pages, emails, and product listings even when the pixel dimensions look correct.
DPI is usually not the web answer
For websites and social platforms, pixel dimensions are usually more important than DPI metadata, which can be missing or misleading.
Common Image Sizes for Social Media
After checking your image size, compare it with common publishing targets. Treat these as practical starting points; platform requirements can change.
| Use Case | Common Size | Why It Matters |
|---|---|---|
| YouTube thumbnail | 1280 x 720 | Wide 16:9 thumbnails need enough resolution to stay sharp on large screens. |
| Open Graph image | 1200 x 630 | A reliable social sharing size for article cards, product pages, and launch posts. |
| Square social post | 1080 x 1080 | Useful for profile grids, simple product graphics, and reusable campaign assets. |
| Story or vertical post | 1080 x 1920 | Vertical 9:16 images fill mobile screens and avoid awkward cropping. |
How to Check Image Size
Use this image size checker when you need a quick answer before uploading, publishing, printing, or sending image requirements to someone else.
1. Add an image
Choose a file, drag it into the checker, or paste an image from your clipboard.
2. Read the metrics
Review width, height, file size, format, aspect ratio, megapixels, and orientation in one place.
3. Copy the result
Copy the numbers into your ticket, content brief, upload checklist, or design handoff.
Image Size Checker FAQ
Short answers for people searching for image dimensions checker, image file size checker, photo size checker, image resolution checker, and image aspect ratio calculator.
What image formats can I check?
Most browser-supported image formats work, including JPG, PNG, WebP, GIF, SVG, AVIF, and BMP. Support depends on your browser.
Is image size the same as image dimensions?
Not always. Image dimensions mean width and height in pixels. Image file size means storage weight, such as KB or MB. This checker shows both.
Can this check photo size?
Yes. A photo is an image file, so the checker can show photo dimensions, file size, format, aspect ratio, megapixels, and orientation.
Does DPI matter for websites?
Usually no. For web publishing, pixel dimensions and file size matter more than DPI. DPI metadata is more relevant to print workflows.
Why is my image file size large?
Large dimensions, low compression, transparent pixels, animation, or high-quality export settings can increase file size. Use the metrics here to decide whether to resize, convert, or compress the image.