Bulk Image Compressor — Free, No Upload, No Limit
Big photos slow pages down and eat your storage. A bulk image compressor fixes that in seconds — drop in a folder of pictures and each one comes out smaller while still looking sharp, with a quality slider or an exact target size in your hands.
Drag & Drop Images
JPG, PNG, WebP, AVIF · compressed in your browser
100% Browser-Local Compression
0 images · 0 B → 0 B
Drag the handle to compare · original on the left, compressed on the right
This online image compressor runs entirely on your device. Your files never leave the browser, there is no sign-up, and nothing caps how many you process at once. Drag a batch above to try it — most images shrink by half or more.
Why use a bulk image compressor?
Images are usually one of the heaviest parts of a web page, so they decide how fast it feels. Google's Core Web Vitals reward that speed too: the biggest thing a visitor sees — often a photo — needs to load quickly for a good Largest Contentful Paint score. Smaller files get you there.
Lighter images help everywhere else, as well — quicker email attachments, faster uploads to forms and marketplaces, and less space used on your phone or drive.
How this online image compressor works
Drag in JPG, PNG, WebP, AVIF or HEIC files — one, or a few hundred. The tool re-encodes each picture with your browser's built-in Canvas API, right on your device. Pick a quality level, or set an exact target like 100 KB or 1 MB, and watch the result update live.
Need a precise number? Jump straight to Compress to 50KB, Compress to 100KB, or Compress to 200KB — handy for IDs, avatars and portal uploads.
What you can do
- Compress in bulk — drop a whole folder or a ZIP at once.
- Use a quality slider, or hit an exact KB / MB target.
- Compare before and after live, so you trust every result.
- Keep your format, or convert to JPG, PNG or WebP.
- 100% private: no upload, no sign-up, no watermark.
- Download everything together as a single ZIP.
JPEG, PNG or WebP?
JPEG suits photos and is the format most people reach for; used as a jpeg image compressor, this tool trims that size without an obvious drop in quality. PNG stays lossless, so it is better for logos and transparency. WebP is the modern all-rounder — Google reports that WebP lossy images are 25–34% smaller than JPEG, and lossless WebP is about 26% smaller than PNG. Switching format can save even more.
Frequently asked questions
Is this bulk image compressor really free?
Yes. Every tool here is free, with no sign-up and no watermark, and you can compress as many images as you like in one go.
Do my photos get uploaded anywhere?
No. The image compressor runs in your browser with the Canvas API, so your files stay on your device and never reach a server.
Will compressing lower the quality?
A little, with lossy formats like JPEG and WebP. Use the quality slider and the live before/after compare to land on a size you are happy with. Lossless PNG keeps every pixel.
What file size can I compress to?
Pick any quality, or hit an exact target — for example Compress to 50KB, Compress to 100KB, or Compress to 200KB for IDs, forms and web uploads.