Image Size Checker Pro EN

Heavy images are the most common reason a page loads slowly. Image Size Checker Pro shows you which images are too big, by how much, and fixes them without changing your markup.

AUDIT ANY PAGE
• File size, pixel dimensions and how each image is actually displayed
• Flags images over your size limit, images with far more pixels than they need, stretched or squashed images, and missing alt text
• Achievable savings are measured by really compressing each image, not guessed
• Badges and tooltips right on the page, or a clean report in the popup or side panel

COMPRESS AS DROP-IN REPLACEMENTS
• Same filename, same format, same pixel dimensions, so you can overwrite the original files
• PNG compression is lossless and pixel-exact
• JPEG and WebP keep high quality by default; preview before and after and pick the quality yourself
• Compress one image, or everything at once into a ZIP
• Save straight into a folder you choose (for example your site's images folder) or use the Save-As dialog

RESIZE FOR HOW IMAGES ARE DISPLAYED
• Creates 1x and 2x versions sized for the space each image fills, never upscaled
• Gives you ready-to-paste srcset markup

OPTIONAL EXTRAS
• WebP copies with markup
• Lossy PNG (256-color palette), used only when the result is visually near-identical
• Export the audit as CSV, JSON or a Markdown table

PRIVATE BY DESIGN
No accounts, no analytics, no tracking. Pages are scanned only when you ask (unless you turn on auto-scan), all processing happens in your browser, and files are saved only to your computer.

Optional keyboard shortcuts: pick your own keys to open the extension or show and hide the on-page badges.