Image compression FAQ
Common questions about free browser image compression, file privacy, target sizes, and batch downloads.
Are my images uploaded to PicZip?
No. PicZip compresses selected images in your browser. Your image files are not uploaded to a PicZip server for compression.
Is PicZip free to use?
Yes. The core image compressor is free to use and does not require an account, email address, or subscription.
Which image formats are supported?
PicZip supports JPG, PNG, and WebP images. You can keep the original format or choose a different output format when smaller files matter.
Can I compress multiple images at once?
Yes. You can add multiple files, compress them in sequence, and download the results as one ZIP file.
Why does a target size sometimes need lower quality?
A strict target like 100KB may require a lower quality value or smaller dimensions, especially for large photos with many details.
Can PicZip compress an image to an exact size like 100KB?
PicZip can target a specific file size, but exact results depend on the image. Large or detailed photos may need a smaller maximum width or lower quality to reach 100KB.
Does PicZip work offline?
PicZip is a browser app. Some assets may stay cached by the browser, but full offline support should be treated as a future improvement rather than a guarantee.
Why is AVIF not included yet?
AVIF can produce small files, but browser-side encoding is often slower. PicZip starts with JPG, PNG, and WebP because they cover the most common compression tasks.