Can I compress a whole folder of images at once?

Yes. Select all files in the folder and drop them into the batch compressor in one move. Every image runs through the same quality and format setting, then you download them together as a single ZIP, all inside your browser.

Will batch compression give the same quality as one at a time?

Yes, if you use the same setting for every file. Batch processing applies the identical encoder and quality to each. For a mixed folder, group similar image types first — photos at quality 80, graphics at higher — then run each folder as its own pass.

Does batch compression upload my images to a server?

No. The batch tool runs fully in your browser. Your images are read and compressed locally and packed into a ZIP on your own device, so a folder of private photos never leaves your machine.

Compress a Folder of Images in One Pass

A website refresh hands you 80 photos. Compressing them one dialog at a time is a slow afternoon you will never get back. The batch way: pick the setting once, drop the whole folder, ship one ZIP.

Here is the exact flow, start to finish.

1. Sort the folder first

Photos, screenshots and graphics compress differently. Drag only the photos into one pass at quality 80, and handle the graphics in a second pass at a higher quality. Same tool, two groups, better results than a single mixed run. See why quality 80 for photos.

2. Set it once

Choose the quality slider and, if you want, switch on WebP conversion. The chosen setting applies to every file in the batch — that is the entire point of batch mode: consistency in one move.

3. Drop everything, then scan

Select all the files in the folder and drag them in. Each row shows its before and after size and the percentage saved. Skim the list — if one file saved far less than its neighbors, it was probably already compressed; lower its quality only if it matters.

4. Download the ZIP

Hit the ZIP button and a single archive with every compressed file is saved to your device. It never touched a server, so a folder of private photos stays private. This local behavior is exactly what the compressor guarantees.

When batch is the wrong tool

If one image is the star of the page — the hero or a listing's main shot — treat it individually and size it to its slot. Batch keeps the mundane consistent; the hero deserves a second look.