Free open-source software for Windows with format conversion between WebP, PNG, JPG, BMP, and TGA, flexible resizing, and detailed quality settings for each format.
| OS | Windows 10 or later (64-bit) |
| RAM | 4GB or more recommended |
| Disk Space | ~150MB |
No installation required · Extract and run
Support for WebP, PNG, JPG/JPEG, BMP, and TGA formats. Significantly reduce file size by converting to modern WebP.
Add hundreds of images at once with drag & drop. Process them quickly in batch to save time. Click a column header to sort the list by name, resolution, size, or date.
One button rescans every folder in the list. New images are appended at the bottom and deleted ones are removed, so you can keep the app open and add images as you go.
Images whose output already exists are skipped automatically. Keep dropping files into the same folder and only the new ones are converted — no wasted re-encoding, no numbered duplicates.
Choose from 4 flexible modes: percentage, fixed pixels, long edge, or short edge based on your needs.
Fine-tune settings for each format: WebP compression method, PNG compression level, JPG subsampling, and more.
Choose to keep or remove camera Exif information and GPS data to protect your privacy.
Eye-friendly dark mode included. UI is fully localized in English and Japanese for intuitive operation.
Clean and intuitive interface
Eye-friendly dark mode
Real-time conversion progress
Drag & drop images you want to convert
Choose output format from WebP, PNG, JPG, BMP, or TGA
Click button to batch convert
Latest version: 1.3.0 (Released 2026-08-05)
License: GNU General Public License v3.0
How to Use
※No installation required. The extracted folder can be placed anywhere.
※If you see "Windows protected your PC" warning on first run,
click "More info" → "Run anyway"
GitHub