Image File Size Checker
Check the exact file size of an image instantly.
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How to Use
- 1Upload one or more images.
- 2View each one's exact file size, format and dimensions, plus the total.
Features
- Exact file size in KB/MB
- Format and dimension details
- Check many images at once, with a total size
- No upload, 100% in-browser
Instantly check the file size of any image along with its format and dimensions, entirely in your browser.
Check before you upload
Online applications, job portals and email providers often have strict size limits, typically somewhere between 100 KB and a few megabytes for images. Rather than uploading and waiting for an error, check the exact size here first, along with the format and pixel dimensions, which together explain why a file is the size it is. Add several images to see them in one table with their total size, which is handy when a form limits the combined size of all attachments.
KB, MB and why numbers sometimes differ
File sizes are counted in bytes. This tool, like most operating systems, uses 1 KB = 1024 bytes and 1 MB = 1024 KB. Some websites define 1 KB as 1000 bytes, so a file shown as 1.00 MB here is about 1.05 MB by that definition. If you are close to a limit, leave a small margin.
What makes an image file large
| Cause | Fix |
|---|---|
| Very high pixel dimensions (e.g. 4000 × 3000) | Resize to the size it will actually be shown |
| A photograph saved as PNG | Convert to JPG or WebP |
| JPG saved at maximum quality | Compress at 70–85% |
| Unneeded borders or background | Crop them away |
As a rough guide, a well-compressed 1200-pixel-wide JPG photo is usually 100–300 KB. If yours is several megabytes, one of the causes above almost certainly applies.
Need to hit a target like “under 200 KB”? Resize first, then compress. Reducing dimensions gives the biggest saving with the least visible change.