How to Batch Convert WebP Files

Converting 50 WebP images one at a time takes an hour. Batch conversion takes 2 minutes. Here are two methods for any scale.

Method 1: Chrome extension (best for 10-500 files)

Drag-drop batch conversion:

1. Install the WebP to JPG Chrome extension.
2. Click the toolbar icon, then drop an entire folder of WebP files (or select 50+ files at once).
3. Choose quality (90 for JPG is fine), output format (JPG or PNG), and click Convert.
4. The extension outputs a ZIP with all converted files ready to download.

No upload, no watermark, no daily limit. Bounded only by browser memory (typically handles 500 files on a 16 GB machine).

Method 2: Command-line ImageMagick (best for 500+ files)

For very large batches or automation:

1. Install ImageMagick (Mac: brew install imagemagick, Windows: download installer).
2. Open Terminal or Command Prompt and run: mogrify -format jpg *.webp
3. This converts all WebP in the current folder to JPG in seconds.

For preserving original WebP files: for f in *.webp; do convert "$f" "$f%.webp.jpg"; done

Organizing batches: output folder structure

After batch converting 100+ files, you may want to organize:

• Chrome extension: outputs a ZIP with all files in a flat folder. Useful for quick review, then move to permanent location.
• ImageMagick: outputs files to the same folder as inputs by default. Add a script to move them to a separate folder: mkdir converted && mv *.jpg converted/

If you need to preserve original WebP files, always convert to a new folder or rename the outputs.

Quality settings for batch conversion

Decide quality before converting 100 files:

• Quality 90 JPG: Web-safe, looks nearly perfect, typical file size 50-70% of original WebP.
• Quality 75 JPG: Good for thumbnails and social media, file size 30-50% of WebP.
• PNG lossless: No quality loss, but file size usually 10-40% larger than WebP.

Test on one file first, then apply the same setting to your entire batch.

Common batch conversion issues

• "Browser ran out of memory": close other tabs, or split your batch into smaller groups (max 200 files per batch).
• Output files are very large: you probably selected PNG lossless format. Switch to JPG quality 90 instead.
• Missing some files in output: check that all source WebP files are in the same folder and the extension did not time out. If batches are over 500 files, use ImageMagick instead.

At-a-glance comparison

Frequently asked questions