Image Quality & File Size Checker
Analyze file size, format and test compression size reduction.
Image Quality & File Size Checker Online
Image Quality & File Size Checker inspects the exact pixel resolution, aspect ratio, orientation, megapixel count, byte size, and encoding density of any image locally in your browser.
Supported formats: JPG · PNG · WebP · Processing: 100% browser-local HTML5 Canvas & Blob APIs
How to use Image Quality & File Size Checker
- Drop or select any image file to view instant source telemetry right below the preview.
- Review exact pixel width × height, simplified aspect ratio, megapixels, orientation, and byte size.
- Optionally adjust output format and quality to test how much file size can be saved, then click Analyze & Export.
Practical use cases
- Verifying whether an image meets exact pixel width, height, and KB requirements before uploading to a strict portal.
- Checking aspect ratios (such as 16:9, 4:3, or 35:45) and bits-per-pixel compression efficiency.
Common problems & solutions
Solution: Check the "Source dimensions" readout—many portals require an exact pixel width and height (e.g., 413 × 531 px) in addition to a KB limit.
Are my images uploaded to AJN Buzz?
No for this tool. Processing runs in your browser and no sign-in is required.
Does inspecting an image upload my file to a server?
No. Image dimensions and file size are read directly from the local File and ImageBitmap APIs in your browser.
Overview · Image Quality & File Size Checker
Inspect actual file size and dimensions, and compare with a browser-encoded optimized version.
Tool preview