Bulk WebP Converter
Extension Actions
Convert and compress multiple images into WebP format with support for individual and bulk ZIP download.
Bulk WebP Converter makes it simple to transform images into the modern WebP format while preserving their original quality and dimensions.
What makes Bulk WebP Converter different
Maintains original image resolution and visual fidelity
Convert multiple images at once with real-time progress tracking
Extension remains open while you work—no interruptions
Download images individually or as a single ZIP archive
Key Features
High-quality conversion with no unwanted resizing
Easy drag-and-drop interface
Adjustable quality settings to balance file size and clarity
Batch processing for large sets of images
ZIP downloads for convenient sharing and storage
File size comparison to see exactly how much space you save
Optional resizing while keeping aspect ratio intact
100% local processing—your images never leave your computer
Perfect for
Web developers optimizing images for faster websites
Content creators preparing graphics for online use
Digital marketers reducing file sizes for campaigns
Anyone wanting to save storage space without losing quality
How to use
Click the extension icon
Drag and drop your images or browse to select files
Adjust quality settings (default 0.6 gives excellent balance)
Click “Convert All”
Download files individually or as a ZIP
Technical Highlights
Supports JPEG, PNG, GIF, BMP, TIFF, and more
Advanced Canvas rendering for accurate results
Built on Manifest V3 for speed and security
Optimized memory handling for large batches
Works fully offline, no internet required
Why WebP?
WebP images are 25–80% smaller than JPEG or PNG while maintaining the same visual quality. This makes websites load faster, saves disk space, and ensures compatibility with all major browsers.
Permissions Explained
Storage: Save your preferences
Downloads: Save converted images
ActiveTab: Keep the extension popup active
Privacy
All image processing happens locally in your browser. Nothing is uploaded or shared externally.
Latest reviews
- Shantul Abbasi
- As a content creator, I deal with lots of images for social media. This extension saves me so much time. I can batch convert everything at once, preview sizes, and download as a ZIP. The space savings are amazing, and I appreciate that everything runs locally no uploads or privacy worries
- My Card
- I like how simple Bulk WebP Converter is just drag, drop, and convert. The fact that it stays open while working is a small detail, but it makes a big difference when I’m handling dozens of images. The default settings work great, but the ability to adjust quality is nice too. Solid tool.
- Naya Web
- This extension is exactly what I needed for my website projects. It converts all my PNGs and JPEGs into WebP without losing quality, and the file size reduction is huge. The ZIP download makes it super convenient when working with large batches. Can’t believe how much faster my pages load now.