Is the Batch Compressor free to use?

Yes. Batch Compressor is completely free with no sign-up, no watermarks and no usage limits.

Are my files uploaded to a server?

No. Batch Compressor runs entirely in your browser — your files and data never leave your device.

Does it work on mobile and offline?

Yes. It works in any modern browser on desktop or mobile, and the toolkit is a PWA that keeps working offline after your first visit.

Batch Compressor

Compress dozens of images at once with a shared quality setting and download them as a ZIP. Nothing is uploaded to a server.

How it works

1
Add your images
Drag and drop, paste, or browse. Nothing is uploaded — files are read directly in your browser.
2
Choose your options
Set the options for Batch Compressor and preview the result before you export.
3
Process on your device
Batch Compressor runs locally on a Canvas, so even large batches are handled quickly and privately.
4
Download
Save a single file, or grab everything at once as a ZIP.

Common uses

Compress a whole gallery to one quality level for faster page loads.
Get a folder of photos under an upload limit in a single pass.
Optimize every image in a release before shipping, then download a ZIP.

About the Batch Compressor

Compress dozens of images at once with a shared quality setting and download them as a ZIP. Nothing is uploaded to a server.

Batch Compressor is part of a free, privacy-first toolkit. Everything is processed locally on a Canvas with high-quality pica resampling — there are no uploads, no quality loss from a server round-trip, and no limits.

Because batch compressor works without any sign-up or installation, you can use it as often as you like and it's always available — on desktop or mobile, and even offline.

Explore more image tools, or try Image Resizer · Batch Image Resizer.