Image Tools · Browser-based utility
Image Size & Dimension Checker Online Free
Check many images at once for pixel dimensions, aspect ratio, file size and format, then flag files against minimum width/height and maximum-MB rules.
What this tool does
Check many images at once for pixel dimensions, aspect ratio, file size and format, then flag files against minimum width/height and maximum-MB rules.
People often describe this task with phrases such as check image size, image dimension checker, image resolution checker and photo size checker. This page uses those terms only where they refer to the same underlying function.
How to use the Image Size & Dimension Checker
- Open the Image Size & Dimension Checker page and select or enter the source data required by the tool.
- Review the available controls instead of accepting defaults blindly when the destination has a size, format, layout or compatibility requirement.
- Run the operation and inspect the preview, status or generated result before treating it as final.
- Download or copy Audit report and verify it in the destination application, browser, viewer or workflow that will actually use it.
Use the interactive tool above for the actual operation. The documentation below explains what the controls mean, what changes in the file/data, and how to troubleshoot common results.
Settings and capabilities explained
| # | Control or capability |
|---|---|
| 1 | Multiple-image selection |
| 2 | Minimum width in pixels |
| 3 | Minimum height in pixels |
| 4 | Maximum file size in MB |
| 5 | Resolution/ratio/size/format results |
| 6 | Copy results |
Supported input and output
- Input: multiple images
- Output: on-page audit report and copied text
How it works technically
Raster image operations work on decoded pixel data. Dimensions, alpha transparency, color representation and encoder settings can all affect the result independently.
Pixel dimensions describe resolution, while bytes/MB describe encoded storage size; they are related but not interchangeable.
Aspect ratio is independent of absolute resolution: 1920×1080 and 1280×720 are both 16:9.
Common use cases
- Check marketplace image requirements
- Audit social-media assets
- Find undersized product images
- Identify files that exceed upload-size limits
- QA a batch before publishing
Choosing the right settings
- Enter the destination platform’s actual minimum dimensions and maximum file-size rule.
- Use the compressor or resizer after identifying failures.
Common problems and fixes
A large-resolution image is still under the MB limit
Efficient encoding can produce a small file despite many pixels; file size also depends on format and content complexity.
A small-dimension PNG is huge
Screenshots or noisy/complex images can compress poorly, and alpha/lossless encoding may increase size.
Browser processing and privacy notes
The source code for this build performs the documented file transformation or analysis from browser JavaScript/Web APIs, and the video tools load FFmpeg.wasm for media processing. The site also contains third-party analytics, font/CDN and advertising scripts that can make ordinary network requests. Therefore, the precise claim made here is limited to the tool routine: it does not need a separate AutoClip file-upload API in order to perform the documented local operation.
For sensitive files, you should still use your browser’s developer tools or network controls if you need to independently verify the behavior of every third-party request in your environment.
Frequently asked questions
What does the Image Size & Dimension Checker do?
Check many images at once for pixel dimensions, aspect ratio, file size and format, then flag files against minimum width/height and maximum-MB rules.
What input and output does it use?
Input: multiple images Output: on-page audit report and copied text Outputs include Audit report.
Do I need to install desktop software?
No desktop installation is required for this page. The interactive workflow runs from the web browser. Some advanced media features load browser-side JavaScript/WebAssembly libraries when needed.
Are selected files processed through the tool interface?
Yes. The implementation reads selected files with browser APIs and performs the documented transformation or analysis in the page. External libraries, analytics and advertising scripts may make their own network requests, so this statement is about the file-processing routine itself.
A large-resolution image is still under the MB limit?
Efficient encoding can produce a small file despite many pixels; file size also depends on format and content complexity.
A small-dimension PNG is huge?
Screenshots or noisy/complex images can compress poorly, and alpha/lossless encoding may increase size.