How it works
How many images can I process?
Technically unlimited — but your browser's RAM is the ceiling. Most laptops handle 200–500 images comfortably. For very large batches, process in chunks.
Is anything uploaded to a server?
No. Every image is processed entirely inside your browser using the Canvas API. Nothing leaves your device, ever.
What does "Fit" mode do?
Fit scales the image to fit inside your box without cropping. Crop fills the box exactly, trimming edges. Stretch forces exact dimensions even if it distorts.
WebP vs JPG — which to pick?
WebP is 25–35% smaller than JPG at the same quality. For web use, always prefer WebP. For email attachments or print, stick with JPG.
Why use this over Photoshop batch?
No software to install, no export scripts to configure. Drop images, pick a size, get a ZIP. Perfect for non-designers on eCommerce or blog teams.
Can I resize to a specific file size?
For that use our Resize to File Size tool — it binary-searches the optimal quality to hit an exact KB/MB target.