Curtail (previously ImCompressor) is an image compressor, supporting PNG, JPEG and WEBP file types.
It support both lossless and lossy compression modes with an option to whether keep or not metadata of images. It is inspired by Trimage and Image-Optimizer.
Curtail is free and open source software.
Key Features
- Uses OptiPNG, pngquant, jpegoptim and libwebp:
- Define PNG lossy compression level.
- Define JPG lossy compression level.
- Define WEBP lossy compression level.
- Advanced settings:
- Define PNG lossless compression level.
- Define WEBP lossless compression level.
- Progressive encode JPG.
- Option to remove metadata from images.
- Add a customizable suffix to append at the end of each new file.
- Uses threads to compress images simultaneously.
- Dark theme.
- Keyboard shortcuts.
- Internationalization support.
Website: github.com/Huluti/Curtail
Support:
Developer: Hugo Posnic
License: GNU General Public License v3.0

Curtail is written in Python. Learn Python with our recommended free books and free tutorials.
Related Software
| GUI Image Compression Tools | |
|---|---|
| XL Converter | Easy-to-use image converter for modern formats |
| Imagine | Software to compress PNG, JPEG and WebP images |
| Caesium | Simple to use image compression tool |
| Curtail | Lossless and lossy compression modes (PNG, JPEG and WEBP) |
| YOGA Image Optimizer | Convert and optimize JPEG, PNG and WebP images |
| OptiImage | Useful image compressor that supports PNG, JPEG, WebP and SVG |
| Image Optimizer | Simple lossless compression |
| Halftone | Apply a pixel art-like style and reduce the file size in the process |
| PicSharp | Cross-platform desktop image compression application |
| Trimage | Cross-platform tool for losslessly optimizing PNG and JPG files |
| E-Mage | Cross-platform tool for losslessly image compression |
| Drop Compress Image | Convert and compress images |
Read our verdict in the software roundup.
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