Image Compressor
Make photos and screenshots much smaller without visible quality loss. Compress many at once, or squeeze each one under a size limit. Nothing is uploaded.
Drag the divider to compare the original with the compressed image. Use 1:1 to check fine detail.
How to compress images
- Click Choose images or drag your photos onto the box. On a phone you can pick straight from your gallery. You can add many images at once.
- Compression starts straight away with the Balanced setting, which makes most photos 50–80% smaller with no visible difference.
- Want even smaller files? Lower the Quality, or switch to Target size and enter a limit such as 200 KB. Use Resize for very large photos.
- Drag the divider in the preview to compare before and after, then press Download. Several images download together as a ZIP file.
How image compression works
Photos from phones and cameras are often 3–10 MB each, far more than a website, email or online form needs. Compressing an image removes data your eyes are unlikely to notice so the file becomes much smaller while the picture still looks the same. This compressor does all of that inside your browser.
JPG, WebP and AVIF: lossy compression
For photos, the Quality setting decides how much detail is kept. Around 75–85% is the sweet spot: files are usually 50–80% smaller and the difference is invisible at normal viewing size. Lower values give smaller files but fine textures, such as hair, grass or text in a photo, start to look soft or blocky. WebP and AVIF compress better than JPG at the same quality, so converting a JPG to WebP can save another 25–35%.
PNG: fewer colours, same sharpness
PNG is lossless, so the usual trick does not work. Instead, the compressor reduces the image to a carefully chosen palette of up to 256 colours and writes a compact PNG. Screenshots, logos, icons and illustrations often shrink by 60–80% and keep their transparency. Gentle dithering keeps gradients smooth. At 95% quality and above, PNG files are only re-packed without any loss.
Target size
Many sites accept only images under a limit, such as 200 KB for an application photo or 1 MB for a form. Choose Target size, enter the limit and every image is made as good as possible while staying under it. The tool first searches for the highest quality that fits; only if that is not enough does it reduce the pixel size.
Resize first for the biggest saving
A 12-megapixel photo is about 4000 × 3000 pixels, while most screens show at most 1920 pixels across. Choosing Max 1920 px alone can make a photo several times smaller, so it is the best first step for web pages, emails and chat.
Private and safe
Your images never leave your device: everything happens in your browser, with no sign-up, watermark or limit. Compressed files also lose hidden metadata such as the GPS location stored in phone photos. If an image is already well optimised and would only get bigger, the original is kept, so you never end up with a worse file.
Frequently asked questions
How do I reduce the size of a photo?
Add the photo with Choose images. It is compressed immediately with the Balanced setting, which usually makes it 50–80% smaller. Lower the quality or choose a smaller size under Resize if you need it even smaller, then press Download.
How do I compress an image to 100 KB or 200 KB?
Switch to Target size, choose 100 KB or 200 KB (or type any limit) and add your images. Each one is saved at the highest quality that fits under the limit; very large photos are also scaled down if needed.
Does compressing reduce the quality?
JPG, WebP and AVIF compression removes a little detail, but at the default 80% quality the difference is not visible at normal size. Use the before and after preview to check. PNG compression keeps edges sharp and only reduces the number of colours.
Can I compress PNG files and keep transparency?
Yes. PNG images stay PNG and keep their transparent areas. They are reduced to a palette of up to 256 colours, which is ideal for screenshots, logos and graphics. Choose JPG only for photos without transparency.
Are my images uploaded to a server?
No. Compression runs entirely in your browser and your files never leave your device. Only your settings, such as the chosen quality, are remembered on your own device.