Compress Image
Shrink JPG/PNG file size by adjusting quality — all in your browser.
Maximum file size: 50 MB for guests
Create a free account for files up to 500 MB — sign up free.
Shrink JPG/PNG file size by adjusting quality — all in your browser.
Maximum file size: 50 MB for guests
Create a free account for files up to 500 MB — sign up free.
The Compress Image tool reduces the file size of JPG, PNG, or WebP images so they load faster on websites and fit within upload limits. Compression runs in your browser, so your photos never leave your device.
Smaller images improve page speed, save storage, and make email attachments possible. The tool balances size and quality so you can shrink a photo dramatically while keeping it looking sharp.
Image file size has a direct impact on how fast a web page loads and how smoothly an email sends. A 6 MB photo from a modern phone can take several seconds to download on a mobile connection and may exceed the attachment limit of a web form or messaging app. Compressing it to a few hundred kilobytes makes it practical to share without a noticeable drop in how it looks on screen.
The tool gives you control over the trade-off between size and clarity. A moderate quality setting is ideal for web images and social posts, while a higher setting preserves detail for photos that may be printed or cropped later. Because the preview updates as you adjust the setting, you can find the smallest file that still looks right before you download.
Compression runs entirely in your browser using the HTML Canvas API and the native image encoder. When you load an image, the tool draws it to an off-screen canvas at the original dimensions, then re-encodes the canvas pixels as JPG, PNG, or WebP at the quality level you selected. For JPG and WebP, lowering the quality value increases compression; for PNG, the tool applies palette optimisation to reduce file size without lossy artefacts.
Your image never leaves your device — there is no upload, no server-side processing, and no copy retained after you close the tab. The original file on your device is never modified; the tool produces a new compressed file you download alongside it. This makes the tool safe for personal photos, ID scans, and any image you prefer not to send to a third-party service.
For photographs, JPG usually produces the smallest file. For screenshots, line art, or images with large flat areas of colour, PNG or WebP may give a smaller file at higher quality. If you also need to change the dimensions, use the Resize Image tool first, then compress the result. The two tools together can shrink a phone photo by 90 percent or more for web use.