Free image tools
Image Compressor
Reduce file size with a clear before-and-after comparison.
How it works
- Choose your images or drop them into the upload area.
- Adjust the settings for your store or publishing needs.
- Process, compare and download your images.
A few useful details
Original files stay unchanged. Browser memory may limit very large images. This tool processes static images and does not preserve EXIF metadata or animation.
Read the product image guideWhy compress images?
Images are usually the heaviest part of a web page. Large, uncompressed product photos and banners make pages load slowly, especially on mobile data. Slow pages lose visitors, hurt conversion rates and can affect how Google rates your page experience. Compressing images reduces their file size while keeping them looking sharp.
How to use the Image Compressor
- Drop up to 10 images (JPG, PNG or WebP, up to 15 MB each) into the upload area or click to choose files.
- Optional: set a target size in KB. The tool will try to get each image close to that size. Leave it empty to compress by quality only.
- Choose an output format. JPG is best for photos on a solid background. WebP is smaller and supports transparency.
- Adjust quality. 80–85% is a good starting point for most photos. Lower values give smaller files but may show blur or blocky areas.
- Process, compare and download the images one by one or all together as a ZIP file.
Recommended sizes for websites and stores
- Product images: 1200–1600 px wide, usually under 200–300 KB.
- Blog images: around 1200 px wide, under 150–200 KB.
- Full-width hero banners: around 1920 px wide, ideally under 300–400 KB.
- Thumbnails and icons: as small as possible — often under 50 KB.
Resize images to the size they will actually be displayed before compressing them. Our product image resizer can do this in bulk.
JPG, PNG or WebP?
- JPG: great for photos; no transparency.
- PNG: good for logos, graphics and screenshots with sharp edges or transparency, but often large for photos.
- WebP: usually 25–35% smaller than JPG at similar quality, supports transparency, and works in all modern browsers. It is a strong default for websites. Convert with our WebP converter.
Checking quality before you publish
Always compare the compressed image with the original at full size. Look at faces, text inside the image, fine textures such as fabric, and smooth gradients like skies — these show compression problems first. If you notice blur or banding, raise the quality slightly.
Privacy
All processing happens on your device. Your images are not uploaded to our server, which makes the tool safe for unreleased product photos and client work.
Frequently asked questions
Will compressing an image twice make it worse?
Yes. Each JPG or WebP compression loses a little detail. Always start from the original, highest-quality file.
Does Shopify or WordPress compress images automatically?
Both make resized copies and Shopify serves optimised formats, but uploading an already compressed, correctly sized image still saves storage and gives you more control over quality.
Full guide: How to Compress Images for Your Website Without Losing Quality.