Free Online Image Optimizer What it's for

Compress images in bulk

Doing a folder of photos one at a time is the worst part of this job. Drop the whole set in, get the whole set back, and keep the filenames you started with.

How to compress images in bulk

1

Drop the whole set in

Up to ten images at a time. Select them all in your file manager and drag them over together.

2

One pass over all of them

Every image gets the same width and quality, so the set stays consistent. The table fills in as each one finishes.

3

Take the zip

One download for the lot, or save any single image on its own from its row.

Questions

Why ten and not a hundred?

Every image is a separate upload and a separate transform, and ten is roughly where a browser tab stops feeling responsive on an ordinary connection. If you have a hundred, do them in batches of ten; the settings stay put between batches.

Do my filenames survive?

Yes. Each file keeps its original name with the width appended, so holiday.jpg comes back as holiday_1280.jpg. Nothing gets renamed to a random string, which matters when you are matching them back up against something.

Can I use different settings for different images in the set?

Not in one pass, and deliberately so — the point of a batch is that one decision covers all of them. If one photo needs its own treatment, open it on its own from its row in the results table and it moves into the single-image tools.

What if one of them fails?

That row says so and the rest carry on. A batch is not abandoned because one file was a PDF someone had renamed.