Bulk WebP converter: free, private, in your browser

Convert many images, or a whole folder, to WebP at once. Download everything as one ZIP that keeps the folder structure. Your images stay on your device.

Bulk convert images to WebP

Convert many images, or a whole folder, to WebP at once, then download them all as one ZIP that keeps the folder structure. There is no limit on the number of files.

How do I use the Bulk WebP converter?

  1. Choose a mode. Pick Lossless (default), Near-lossless, or High quality with a quality between 40 and 100. Optionally set a maximum size.
  2. Add your images. Drag JPG, PNG, GIF, BMP or AVIF files (or whole folders) onto the page, paste an image, or click anywhere to pick files.
  3. Let it convert. Each file is security-checked, color-optimized when that causes no visible loss, and encoded to WebP by libwebp at its most thorough setting (method 6), one file at a time.
  4. Download. Download each WebP on its own, drag it to your desktop (Chrome and Edge), or download everything as one ZIP.

Frequently asked questions

Can I convert multiple images to WebP at once?

Yes. Drop many files or a whole folder at once. They are converted one after another, and the finished WebPs can be downloaded together as one ZIP that keeps the folder paths.

Is smallwebp.io free?

Yes. smallwebp.io is free to use, with no account, no watermark and no limit on the number of files. Each file can be up to 50 MB and 50 megapixels.

Is it safe to drop unknown files?

Every file is checked before it is opened: the real file type is read from its first bytes instead of trusting the extension, sizes and dimensions are checked against safety limits, and files containing hidden scripts or other appended files are blocked. Only one file is processed at a time.

Converters