How to batch-convert image formats

Converting one image is easy; converting fifty is where a batch tool earns its keep. Change format, resize and compress a whole set in one go.

Pick the right target

• WebP for the web — smallest files at good quality.
• JPG for photos and broad compatibility.
• PNG for sharp graphics and transparency.

Resize while you convert

Down-sizing to the dimensions you actually use is the biggest single saving for web images.