Shrink your images or convert between JPG, PNG, and WebP, with optional cropping and region censoring — free, no sign-up, nothing leaves your browser.
JPG and WebP are lossy formats — they shrink file size by discarding some image detail, and the quality slider controls how much detail gets sacrificed for how much space saved. PNG is lossless: it compresses without throwing anything away, which means it always looks identical to the original but generally produces a larger file for photographic images. That's also why the quality slider has no effect when PNG is selected — there's no "quality" dial on a format that doesn't lose any. For a photo you're posting online, WebP or JPG at 70-85% quality is usually a good balance between file size and visual quality that most people can't tell apart from the original. For a screenshot, logo, or image with sharp edges and flat colors, PNG often compresses surprisingly well and avoids the slight blurring lossy formats can introduce around hard edges.
Yes, completely free with no sign-up and no limit on how many images you compress.
WebP usually gives the smallest file size for the same visual quality and is supported everywhere modern. Use JPG for maximum compatibility, or PNG if you need transparency with no quality loss.
80% is a reasonable starting point for most photos — high enough that quality loss isn't noticeable, low enough to meaningfully shrink the file. Drop lower for images where file size matters more than fine detail, like web thumbnails.
No. Compression happens entirely in your browser — your images are never sent to a server.
Not yet — the censor region applies at the same position across every photo in the batch. If your photos need different regions covered, process them in separate batches.
We've noticed an ad blocker is active. Cwtch.es relies on ads to stay free, so images compressed while a blocker is active will have a small Cwtch.es watermark added in the corner. Disable your ad blocker for this site (or add it to your allow-list) and recheck to compress without it.