Make JPG, PNG and WebP files smaller without visible loss. Pick a quality or a target size, shrink oversized photos on the way, and do a whole folder at once.
Re-encodes the image at the quality you choose, which is where nearly all of the saving in a photo comes from. The pixels are not resized unless you ask for it with Shrink large images. In Hit a file size mode the tool tries up to eight quality levels and keeps the highest one that lands under your limit, so you get the best-looking file that still fits a form, an email attachment or a CMS upload cap.
A 4032 × 3024 phone photo saved by the camera at quality 96 weighs about 3.4 MB. Re-encoded here as JPEG at quality 78 it comes out at roughly 780 KB with the same dimensions. Turn on Shrink large images with a 2048 px longest edge and the same photo drops to about 260 KB, still sharp on a laptop screen. Set a target of 200 KB and the tool lands at quality 66 and 196 KB.
Use it when a file is too heavy for where it is going: a website, a job application portal, WhatsApp, a slide deck. If the picture is also far bigger in pixels than it needs to be, turn on Shrink large images or use Resize Image first; fewer pixels shrink a file more than any quality setting. Do not compress a file that will be edited again later; keep the original and compress the final version once, because every lossy save adds a little more damage.
Quality 75 to 85 is the sweet spot for photos. Same keeps the original type, so a PNG stays PNG and Colours sets how far it is reduced; choose WebP when you want a much smaller file that still supports transparency, or JPEG for the widest compatibility. When a format cannot hold transparency, the Background colour fills the see-through areas. File name tokens let a batch come out as photo-1.jpg, photo-2.jpg and so on.
Does compressing lower the quality I can see? At 75 to 85 a photo looks the same on a screen; you would need to zoom into flat sky or skin to spot the difference. Below 60 you start to see blocky patches and halos around edges. Use Compare in the preview to check before you download.
How does a PNG get smaller? PNG has no quality setting, so the tool reduces the number of colours instead: 256 colours looks the same for most screenshots, logos and graphics and usually cuts the file by 50 to 80 percent, and it keeps transparency. Choose All for a lossless PNG. For photos, WebP or JPEG output is smaller still.
Can I compress many photos at once? Yes. Drop a folder or several files and Batch mode switches on. Every file gets the same settings and you download one ZIP, or each file separately.
Are my photos uploaded? No. The compression runs inside your browser using the canvas API. You can switch off Wi-Fi after the page loads and it still works.
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