Image Compressor

This image compressor makes photos and screenshots much smaller, so they upload, send and load faster. Drop one image or many, choose the quality and maximum size, and download the compressed files.

How the image compressor works

Each image is decoded by your browser, optionally scaled down, and saved again with efficient compression. Phone photos are often 3 to 5 MB; scaled to Full HD at quality 75 they usually drop to 300 to 500 KB with no difference you can see on a screen.

If a compressed file would come out larger than the original (an image that is already well optimised), the original is kept, so the tool never makes a file bigger.

Compress to an exact size in KB

Upload forms often set a hard limit, such as "photo under 50 KB". Choose Compress by: Target file size, type the limit, and every image is made as sharp as possible while staying under it: the quality is lowered first, and the image is scaled down only if it still does not fit. For the most common limits there are ready-made pages: compress image to 20KB for signatures, 50KB for application photos, 100KB for documents and 200KB for email and websites.

PNG compression that keeps transparency

PNG files are compressed the way TinyPNG does it: the image is reduced to at most 256 carefully chosen colours, including their transparency, and saved as an optimised PNG. Transparent backgrounds and soft shadows stay transparent, and logos, icons and screenshots usually shrink by 60 to 80% with no visible change. This runs in a background thread, so the page stays responsive even with large images.

Quality

The quality setting controls how much detail the compression may discard. For JPG and WebP, between 70 and 80 the difference is practically invisible and the savings are largest. For PNG it sets the number of colours: 256 colours from 60, 128 or 64 below that for the smallest files, and lossless from 90, where only the encoding is optimised.

Maximum size

Most savings come from the pixel count. A 12-megapixel phone photo shown on a website or in an email is displayed far smaller than its real size; limiting the longest side to 1920 px (Full HD) or 1280 px removes pixels nobody will see.

Format

• Same as the original keeps each file's format: a PNG stays a PNG and keeps its transparency, a JPG stays a JPG.
• JPG gives the smallest files for photos and works everywhere, but has no transparency, so transparent areas become white.
• PNG keeps transparency and sharp edges; best for logos, icons and screenshots.
• WebP is about 25 to 35% smaller than JPG and keeps transparency. Browsers that cannot create WebP (Safari) save a PNG instead, so transparency is never lost.

Images are compressed one after another, so a large batch takes a few seconds.

Private by design

Your images are processed by your own browser and never uploaded to a server, so they stay on your device. There is no watermark, no sign-up and no limit on how many images you convert.