Downscaling the resolution is a highly effective way to reduce the file size of massive photographs.
1. Upload your image by clicking the upload area or dragging and dropping a file. Supported formats include JPEG, PNG, and WebP up to 12 MB. 2. Adjust the quality slider to your preference. A setting of 70–80% typically cuts file size by 50–70% while keeping the image looking sharp. 3. Click 'Compress Image', review the result in the side-by-side preview, then download your optimized file.
Large images are one of the most common causes of slow websites and poor Core Web Vitals scores. A single unoptimized photo can easily exceed 5 MB. Compressing it to under 200 KB can cut page load time in half, improve Google rankings, reduce hosting bandwidth costs, and give visitors a faster, more satisfying experience on both desktop and mobile.
JPEG is the best choice for photographs and images with many colors — it offers excellent compression with minimal visible quality loss. WebP is a modern format supported by all major browsers that typically achieves 25–35% smaller files than JPEG at the same quality. PNG is lossless and ideal when you need pixel-perfect accuracy or transparent backgrounds, though file sizes will be larger. If you are unsure, try WebP first.
For very large source images — such as photos taken on a smartphone camera at 12 MP or higher — reducing the resolution is often more effective than adjusting quality alone. The downscale options (75%, 50%, 25%) let you shrink the pixel dimensions proportionally. A 4000 × 3000 px photo scaled to 50% becomes 2000 × 1500 px, which is still more than enough for most web and social media uses, and the file size drops dramatically.
Students compressing assignment screenshots before uploading to an LMS. Developers optimizing hero images and product photos to hit Lighthouse performance budgets. Designers preparing assets for Figma handoffs or client email attachments. Marketers resizing and compressing banner ads before campaign launch. E-commerce store owners shrinking product images to speed up their Shopify or WooCommerce storefronts. Bloggers reducing image sizes before publishing to WordPress.
All compression happens entirely in your browser using the HTML5 Canvas API. Your images are never sent to any server, stored in the cloud, or shared with third parties. This makes the tool safe for compressing confidential documents, ID photos, medical images, and any other sensitive content.
Start with a quality setting of 80% and lower it gradually until you notice visible quality loss, then step back up by 5. For photographs, JPEG or WebP at 75–85% is almost indistinguishable from the original at half the size. Avoid compressing an already-compressed JPEG repeatedly — each round of lossy compression adds more artifacts. If your source image is a screenshot or contains text, keep quality above 85% to prevent blurry edges on letters and UI elements.
No. Compression runs entirely in your browser using the Canvas API. Your images never leave your device, which means your data stays private and the tool works even when you are offline.
You can upload JPEG, PNG, and WebP images up to 12 MB. You can also choose to output the compressed result in any of these three formats regardless of the original format.
It depends on the source image and the settings you choose. A typical JPEG photo compressed to 75% quality with no downscaling often sees a 50–70% reduction in file size. Switching to WebP and downscaling by 50% can reduce a large photo by 85% or more.
Only if you use the Downscale Resolution option. At 100% (the default), the pixel dimensions stay the same and only the file size changes. Choosing 50% halves both the width and height.
Yes. PNG and WebP both support transparent backgrounds. If you upload a transparent PNG and keep the output format as PNG or WebP, transparency is preserved in the compressed result.
PNG is a lossless format, which means it stores every pixel exactly — there is no quality trade-off to make. The quality slider only affects lossy formats like JPEG and WebP. To get smaller PNGs, use the downscale option or switch the output format to WebP.
No. You can compress as many images as you like, one at a time, completely free with no account required.
