Compress an image to KB.

Choose a JPG (JPEG) or PNG image, select a size limit, then click Compress image. For a 50KB limit, enter 50 in the custom limit field. You can also enter a whole number from 10 to 20,000KB. A successful result will not exceed the selected byte limit: 100KB means no more than 100,000 bytes. If the image cannot fit within the tool’s limits, an error message is shown.

Choose the 1MB button or enter 1000 in the custom limit field. This tool uses 1,000 bytes per KB, so a 1MB target means no more than 1,000KB, or 1,000,000 bytes. After compression, check the result’s actual file size and pixel dimensions.

Pixel dimensions describe an image’s width and height; file size in KB describes how much storage it uses. Image compression reduces file size, and images with the same pixel dimensions can have different file sizes. This tool does not let you set an exact width and height in pixels. It adjusts quality first, then reduces pixel dimensions proportionally only if needed.

Choosing an image, compressing it and downloading the result are all free. No account or app installation is needed. Your browser must support JavaScript and image processing.

Your selected image is processed in this browser. We do not upload it or keep it in site storage, and we do not use external advertising or analytics tools. The original file is not changed. Downloaded files are saved on the device you choose.

Loading the website requires a network connection. Our hosting provider, Cloudflare, may process connection information such as your IP address to deliver and protect the site. This is separate from processing your selected image. See the Cloudflare Privacy Policy.

On your first visit to the default address, the site uses the country estimated from your IP address to choose a language. To remember your manual choice, only its language code is saved in this browser’s local storage and a cookie (for one year), so future visits to the default address can open in that language. A URL that specifies a language always takes priority. Your image and filename are not sent during this process. You can change the language at any time in the language menu.

JPG quality is adjusted first. If that is not enough, pixel dimensions are reduced while keeping the aspect ratio. Smaller size limits can blur details, so check that text and faces are clear in the preview. If your destination requires specific pixel dimensions, check the result’s dimensions too.

You can select one JPG, JPEG or non-animated PNG, up to 20MB (20,000,000 bytes) and 24 megapixels. Animated PNG (APNG), GIF, HEIC, WebP, PDF and batch processing are not supported. Large images may be difficult to process because of device memory or browser image-processing limits.

A PNG that needs compression is converted to JPG, with transparent areas filled white. This conversion is not suitable if you need to keep a transparent background.

If your image already fits the limit, the original file is returned without recompression. Its pixels and photo metadata are preserved; that metadata may include location information. Do not use this tool to remove location data. The original file on your device is not modified, whether or not compression is needed.

This tool reduces file size. Check your destination’s other requirements, such as pixel dimensions, format, face or background rules, and whether the file is accepted. Targets use 1,000 bytes per KB. A result that exceeds the target is not shown as a success.