About Bulk Image Converter

Convert multiple images at once to a chosen format. Part of the DevTools Surf developer suite. Browse more tools in the Images collection.

Use Cases

• Optimizing an entire product image catalog for e-commerce
• Converting design deliverables from PSD exports to web formats
• Migrating a legacy site's image library to modern formats
• Preparing multiple hero images for responsive srcset attributes

Tips

• Select all images at once to convert an entire folder in one step
• Choose a single target format for consistent output across files
• Use this for batch WebP conversion to optimize an entire site

Fun Facts

• Google's PageSpeed Insights can penalize sites that serve images in legacy formats instead of WebP or AVIF.
• The average web page in 2024 contained over 1 MB of images, making bulk optimization one of the highest-impact performance wins.
• AVIF, based on the AV1 video codec, was standardized in 2019 and offers up to 50% better compression than WebP.

FAQ

Which formats can I convert to?

PNG, JPEG, WebP, AVIF, GIF. Source formats include those plus HEIF, BMP, TIFF (browser support varies).

Does it compress during conversion?

Quality slider for lossy formats (JPEG, WebP, AVIF). Lossless formats (PNG) use optimized encoders but no quality loss.

What's the batch limit?

Hundreds at once in the browser. For thousands of images, use a command-line tool (sharp, ImageMagick) for speed.