4K Images

Runs 100% in your browser

Compress Images Without Visible Quality Loss

Make photos and graphics smaller with the same encoders the Squoosh project uses. Each result shows its real size against the original, and nothing leaves your device.

Settings

Apply settings to

Settings apply to every image in the queue.

Format and quality

HEIC is saved as JPG: browsers cannot write HEIC.

80

For JPG, WebP and AVIF. Lower is smaller; 75–85 is hard to tell apart from the original.

Size and metadata

Only makes larger images smaller (Lanczos3). Fewer pixels is the biggest saving.

Removes camera data, location and comments. The colour profile is kept so colours do not change.

PNG compression
How PNG files are compressed

Applies to PNG output. Smart reduces the image to at most the number of colours below, with dithering, then saves an indexed PNG: usually far smaller, with a small visible change on photos. Lossless keeps every pixel exactly.

256

256 looks close to the original for most graphics and screenshots; fewer colours make smaller files.

Blends the reduced colours with fine patterns, so gradients stay smooth instead of banding.

Optimisation effort (OxiPNG)

Lossless in every setting: more effort tries more ways to pack the same pixels. Auto uses Strong up to 4 megapixels and Fast above, where Strong can take a minute.

Queue

Images you add appear here.

    Keyboard shortcuts

    ?
    Show this list
    U
    Compress all
    D
    Download the selected image
    Z
    Download all as ZIP
    + / − / 0
    Zoom in, out, fit (in a viewer)
    Arrow keys
    Pan when zoomed (in a viewer)
    T or hold Space
    Show the original (in a viewer)

    Shortcuts are off while you type in a field.

    How it works

    Three steps, all on your own device.

    1. Step 1: Add images

      Drop, paste or pick up to 10 JPG, PNG, WebP or AVIF images, up to 20 MB each. They stay on your device.

    2. Step 2: Choose format and quality

      Keep the format or switch to WebP or AVIF, set the quality, and optionally cap the size. The selected image re-compresses as you change settings.

    3. Step 3: Compare and download

      Check the result at 100% against the original, see the size saved, and download one image or the whole batch as a ZIP.

    Questions and answers

    How much smaller will my images get?
    It depends on the image and the settings, so the tool does not promise a number. After compressing, each result shows its real size next to the original and the percentage saved, and the batch shows the total. Photos straight from a phone or camera usually shrink the most; images that were already compressed hard shrink little.

    Will I see a difference in quality?
    JPG, WebP and AVIF remove detail your eyes are least likely to notice. At quality 75–85 most photos look the same as the original on screen; use the comparison viewer at 100% to check yours. For PNG, Lossless keeps every pixel exactly; Smart reduces the image to at most 256 colours (or fewer, if you choose), which is hard to see on graphics and screenshots and can show as fine dithering on photos.

    How does PNG compression work here?
    Two ways. Lossless (OxiPNG) finds a tighter way to store exactly the same pixels, with more effort for a smaller file. Smart first reduces the image to a palette of at most 256 colours, chosen for how people see colour, and dithers only smooth areas such as gradients so they do not band; the result is an indexed PNG, which is usually much smaller. Transparency is kept in both.

    What happens if the compressed file is bigger?
    That can happen with images that were already well compressed. The tool then keeps your original file unchanged and says “larger than original — kept original”, so you never download a worse, larger file.

    What does “Remove metadata” remove?
    Camera details, date, location (GPS) and comments stored in the file. The colour profile is kept, so colours look the same. Turn the option off to keep the metadata in JPG, PNG and WebP files; AVIF output cannot carry it.

    Tools

    More free image tools

    Every tool runs in your browser. Nothing is uploaded.