Bulk Image Compressor — Compress Many Images at Once
Compress up to 50 photos per batch and download them as a ZIP. 100% free, no upload, no signup — everything runs on your device.
Drop images here or click to choose
processed on your device — never uploaded
Compressing one photo is easy. Compressing the forty from a product shoot, an event or a real-estate listing, one by one, is an afternoon gone. Drop the whole set here, set one target size per image, and every file is brought under it. When the batch finishes you download everything as a single ZIP.
Each image is handled separately: the tool looks for the best quality that fits the target for that particular photo, so a simple image keeps more quality than a busy one instead of all of them getting the same blunt setting. Files appear in the list as they finish, so you can see progress on a big batch.
The work happens on your device, so the photos of a client's house or an unreleased product never sit on someone's server. The practical limit is memory: a browser can only hold so many decoded photos at once, which is why a batch is capped at 50 images. It is not a paywall; when one batch is done, drop the next.
Frequently asked questions
- How many images can I compress at once?
- Up to 50 per batch. That is a memory limit of the browser, not a paywall: when a batch finishes, drop the next one. Every image is processed on your device and nothing is uploaded.
- How do I get the results?
- Each file appears in a list as it finishes, and you can grab everything in a single ZIP download.
- What are the files called in the ZIP?
- Each file keeps its original name with the target added, for example beach-200kb.jpg, so you can tell the compressed copies from the originals.
- Which formats can I mix in one batch?
- JPG, PNG and WebP can go in the same batch. The results are saved as JPG, the format that makes photos smallest; that means transparent areas of a PNG become white.
Guides
- Image compression explained: JPG, PNG, WebP, and how to hit an exact file size Why a photo is 4 MB, what actually makes it smaller, the real differences between JPG, PNG and WebP, and how to get a file under 100 KB or 200 KB for a form without it turning to mush.
- HEIC: why iPhone photos will not open on Windows, and every way to fix it Since 2017 iPhones save photos as HEIC, a format half the size of JPG that Windows, many websites and most printers cannot read. What HEIC is, what you lose by converting, the iPhone settings that avoid the problem, and how to convert without uploading.
Related tools
🔒 Your files are processed on your device. This tool runs entirely in your browser — nothing is uploaded.