Image Size Checker
Image size checker: Review the technical details that determine whether an image is ready to publish, share, or optimize.
Choose an image
Drag & drop, click to browse, or paste from clipboard (Ctrl+V / Cmd+V)
Tip: copy an image, then press Ctrl+V or Cmd+V here
Upload an image to get a copy-ready summary.
How to use this image size checker in 3 steps
Add an image
Choose a file, drag it into the image size checker, paste from clipboard, or try the sample image. Files load in memory — there is no cloud upload step. We support JPG, PNG, WebP, GIF, BMP, and HEIC from iPhone.
Read the metrics
Review width, height, file size, format, aspect ratio, megapixels, and orientation at a glance. The image size checker also flags whether file weight is light, moderate, or large for web and email use.
Act on the result
Copy dimensions or a full summary, apply a suggested social size, resize a local copy, or optimize file weight before downloading. Your original file is never stored or transmitted.
Understand image size before publishing
Private · No upload
Traditional online checkers upload your image to a remote server. This image size checker uses the browser Canvas API in your tab — your photos are never transmitted to our servers, ideal for confidential or client work.
Dimensions and file size in one view
Image size can mean pixels, storage weight, format, or display ratio. The checker shows all four side by side so you know whether an image fits a CMS form, email attachment limit, or social upload requirement.
Social size comparison built in
Suggested size cards compare your image with YouTube thumbnail (1280×720), Open Graph (1200×630), square post (1080×1080), and vertical story (1080×1920) targets — with exact match, same ratio, or needs-resize status.
Resize and optimize without leaving the page
Enter target pixels or pick a preset, preview the output, and download a resized or optimized copy locally. No queue.
Image size checker — common questions
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