Shrink photos right in your browser. Nothing is uploaded.
Your files never leave this device.
Image compression makes a picture's file size smaller while keeping it visually close to the original. Drop your images here, pick a quality or a target size, and download the smaller files one by one or as a ZIP. Everything runs in your browser, so your photos are never uploaded to a server.
Use a quality between 70 and 85: most photos look the same but become much smaller. For logos and screenshots keep PNG; the tool reduces them to 256 colors, which is usually invisible on flat graphics.
At the same visual quality, WebP is usually smaller than JPEG, and AVIF is often smaller still. JPEG opens everywhere, so choose it when you are not sure where the image will be used.
Yes. This page compresses images inside your browser with WebAssembly, so the files never leave your device. You can confirm it in your browser's network panel: no image is sent anywhere while you work.
Yes. Drop as many images as you like; they are processed in parallel on your device and can be downloaded together as one ZIP file. There is no daily limit.
Yes. Compressed copies are written from scratch, so EXIF data such as the camera model, date and GPS location is not carried over. If a file cannot get smaller, the original is kept unchanged, metadata included.
Set a target size, for example 1 MB or 500 KB, and the tool lowers the quality, then the dimensions, until each photo fits. Many email services cap attachments at roughly 20 to 25 MB in total.
AVIF is a modern image format based on the AV1 video codec that produces very small files. Current versions of Chrome, Edge, Firefox and Safari open it, but some older apps and editors do not.
If you only want a smaller file, keep the same format as the original. Pick a format yourself when you know where the image will end up. JPEG is the safe choice for photos that must open everywhere, and compressing JPEG files at a quality between 70 and 85 usually cuts the size a lot with no visible change. WebP and AVIF give smaller files at the same look, but some older apps and editors cannot open AVIF.
Screenshots, logos and flat graphics are a different case. For those, stay with PNG. PNG compression reduces the picture to 256 colors, which is rarely visible on flat artwork but can show banding in a smooth gradient or a photo. If the image needs transparency, do not switch it to JPEG.
Use quality mode when you want to decide how the picture looks. Use target-size mode when someone else sets the rule: a form that rejects files over 100 KB, an email limit, a website that wants images under 500 KB. In this mode the tool lowers the quality first, then the dimensions, until each photo fits. The most common case has its own page: compress an image to 100 KB.
A very low target makes the picture soft. If the result looks poor, raise the target a little or limit the longest side first.
Dimensions matter more than quality. A photo that is 6000 pixels wide but shown 800 pixels wide on a web page carries far more pixels than anyone sees. Limit the longest side here, or use Resize Image first and compress afterwards.
Then use the before and after slider. Zoom into faces, text and edges, because compression damage shows up there first. If you are sending photos as WebP, converting JPG to WebP is another way to save space.
Do not compress a file that was already compressed, over and over. Every pass through a lossy format removes a little more detail, so always start again from the original. Do not chase a size by dropping the quality to a very low value when a smaller picture would do the job.
If an image is already well optimized, the result can be bigger than the original; in that case the original is kept. Compressed copies carry no camera or location data. To check or clean other files, such as PDFs, use Remove Metadata.
| This tool | Upload-based services | |
|---|---|---|
| Do files leave your device? | No | Yes |
| Account required | No | Often |
| Daily limit | None | Often |
| Watermark | None | Sometimes |
With the local MCP server, an AI assistant such as Claude can run this compressor on files on your computer, for example: “make every photo in this folder smaller than 300 KB”. The tool is called compress_image, and your files stay on your machine.
