Bulk Image Compressor - Compress Multiple Images Online

Each batch accepts up to 100 files, with a limit of 100MB per file. If you have more than 100 images, simply run a second batch after downloading the first ZIP. On older phones or laptops, very large batches may process slowly because everything runs in your device's memory, so splitting a heavy batch into two runs can feel faster.

The tool accepts JPG, PNG, WebP, GIF, BMP, ICO, SVG, AVIF, TIFF, HEIC, and HEIF, plus camera RAW formats including DNG, CR2, CR3, NEF, ARW, ORF, RW2, and RAF. You can mix any of these in a single batch. Output is always JPG, PNG, or WebP, chosen automatically in Auto mode or forced with the format tabs.

No. Every step, from decoding to compression to building the ZIP, happens locally in your browser using the Canvas API. There are no uploads, no network calls with your images, no accounts, and no tracking. This matters even more for batches: sharing one photo with a random website is a small risk, but sharing 100 personal photos is not one you should take.

Auto keeps JPG, PNG, and WebP files in their original format so nothing changes unexpectedly. Everything else, such as TIFF, HEIC, RAW, BMP, or SVG, is converted to JPG, or to PNG when the image has transparency that JPG cannot preserve. The result is a ZIP full of files that open on any device, without you deciding a format for each file.

Some images arrive already heavily optimized, so re-encoding them at a high quality setting can produce a slightly bigger file. The tool marks these results in amber so they are easy to spot. Your options: lower the quality slider and re-compress, enable a resize to reduce pixel dimensions, or just keep the original for those specific files. The rest of the batch is unaffected.

Yes. The tool first reads the EXIF orientation and bakes the correct rotation into the pixels, then strips the metadata block entirely. That removes GPS coordinates, camera model, and shooting details, which shrinks files further and protects your privacy before photos travel through WhatsApp groups, email, or public listings. If you need EXIF preserved for archival purposes, keep the originals as your masters.

Yes, and it is the single biggest lever for file size. The Resize section offers three modes: a percentage slider from 10 to 100 percent, custom width and height in pixels with an aspect-ratio lock, and 10 presets covering common needs like Thumbnail, HD 720p, Full HD, Instagram Square and Portrait, Twitter Header, Facebook Cover, and YouTube Thumbnail. The chosen resize applies to every image in the batch.

Only the first frame is kept; the animation does not survive bulk compression. This is an honest limitation of the batch pipeline, which treats every input as a still image. If you need to shrink a GIF while keeping its motion, use the dedicated GIF Compressor on this site instead, which reduces colors and frames while preserving the animation itself.

All three are decoded in the browser and saved as JPG or PNG; the tool never outputs these formats. Multi-page TIFFs keep only their first page. For RAW files, the output is the camera-embedded preview JPEG, not re-developed sensor data, so it is ideal for sharing and quick delivery but you should always keep your RAW masters for serious editing work.

Windows SmartScreen sometimes flags files that were generated inside the browser rather than downloaded from a web server, because they carry no publisher reputation. This is expected behavior for locally built ZIPs and does not indicate anything harmful; the archive contains only your own compressed images. You can safely keep the file. The same ZIP opens normally on Android, macOS, Linux, and iOS.

Yes, completely. There is no signup, no watermark, no daily limit, and no premium tier hiding the useful features. Because processing happens on your own device, we have no server costs per image, which is exactly why the tool can stay free at batch scale. Run as many batches as you like, whenever you like, on any device with a modern browser.