Free browser tool

Batch image compressor

Compress multiple images with chosen format, quality, and maximum width.

Input and settings

How to use it

Compress several images in one pass while standardizing output format, quality and maximum width. After processing, compare each original file size with its compressed result before downloading the files you want to keep.

Choose up to 50 images.
Select WebP, JPEG or PNG, then set quality and maximum width.
Run the batch, compare file sizes and visually inspect representative outputs before downloading.

Output: WebP / JPEG / PNG
Quality: 10–100
Maximum width: 100–8000 px
Batch size: Up to 50 images

Start web photos at WebP, quality 80 and max width 1920 px

A group of 6000 px phone photos often becomes much smaller after reducing the maximum width to around 1920 px, even before you push the quality setting very low.

JPEG cannot preserve transparency and transparent pixels become a solid background. PNG also behaves differently from lossy JPEG/WebP, so lowering the quality control does not guarantee a large PNG size reduction.

Maximum width often matters more than aggressive quality reduction

A photo used at normal web sizes rarely needs its full camera resolution. Shrinking dimensions first can save a large amount of data while keeping visible detail more stable.

WebP, JPEG and PNG solve different problems

Photos are usually good candidates for WebP or JPEG, while graphics that need transparency may need PNG. Do not expect the same compression behavior from every format.

Check appearance as well as the byte count

A dramatic file-size reduction is not useful if product edges, small text or fine texture becomes visibly damaged. Open a few representative images at 100% before applying one setting to a large batch.

Use separate settings for different asset types

A practical workflow is to compress photos together, then handle logos, screenshots and transparent graphics as a second group with settings that fit those assets.

Keep originals until the batch is accepted

Batch conversion is convenient but easy to over-apply. Keep source files until you have checked the final site or document and confirmed the outputs are good enough.