Compress an image and reduce its size

Not at sensible settings. JPG and WEBP compression work by discarding detail your eye barely registers, and at quality 75 or above the difference is invisible on a screen. Push below 60 and damage starts to show, first as soft edges and blocky patches in skies and other smooth areas. The result row shows you the output before you download anything, so nothing degrades silently.

No. Compression runs on your own device through the browser Canvas API; the file never reaches a server and nothing is stored once you close the tab. You can verify this yourself: open your browser network tab while compressing and watch, or switch off your wifi entirely. The tool keeps working, because there is nothing to send.

Tap one of the target presets or type your own number into the target field. The tool then runs a search across quality levels to find the highest quality that still fits under your number, and if quality alone cannot get there, it scales the pixel dimensions down as a last resort. In a batch, every image is fitted under the target individually, so a small photo is not punished because a big one needed more work.

WEBP, usually 25 to 30 percent smaller than JPG at the same visible quality, and every current browser supports it. Choose JPG instead when the file has to open in older desktop software or picky upload forms. If you want to go smaller still, the Image Converter can write AVIF in Chromium browsers, but WEBP is the safe modern pick.

PNG is a lossless format: it has no quality dial to turn down, so the slider has little effect on it. If your PNG is a photograph, switch the output format to JPG or WEBP in the Compress step and it will routinely drop 80 to 90 percent. Keep PNG only for logos, screenshots and images that need transparency, where its perfect edges are the whole point.

Yes. Drop as many images as you like in one go. They are processed one after another to keep your device memory stable, each one is fitted to your settings individually, and the results list every file with its own download link plus a single Download All as ZIP button at the bottom.

Not by itself: compression lowers quality, not pixel dimensions. If you also want fewer pixels, click Add step and put a Resize step before the compression, and both run in one pass on one upload. The one exception is target-size mode, which scales dimensions down as a last resort when quality alone cannot reach your number, and it tells you when it did.

Yes, as a side effect of how it works. The tool re-encodes your image from raw pixels, and EXIF metadata, including GPS coordinates, camera model and timestamps, does not survive that rebuild. If you want to see what your photo was carrying first, run it through the EXIF Metadata Viewer before compressing.

For email, keep each image under 1 MB and nobody complains. For upload forms, 100 to 200 KB clears almost every limit. For your own website, under 200 KB keeps pages fast. Messaging apps like WhatsApp recompress whatever you send anyway, so 500 KB is plenty. Our image size cheat sheet on the blog has exact numbers for every platform.

You can, but each lossy save discards a little more detail, and repeated rounds of compression add up visibly. The better habit is to keep one high-quality original and export a fresh compressed copy from it whenever you need a different size, instead of re-compressing an already compressed file.