PNGGauntlet is a free, easy-to-use program that reduces the file size of PNG images without sacrificing quality.
Best OptiPNG Alternatives ranked by AI · updated May 2025
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OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any image data.
Price: Free
🎯 optipng.sourceforge.net
Top 6 OptiPNG alternatives
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PNGOUT is a fast and efficient PNG optimizer known for producing very small files.
Pros
- High compression ratio
- Command-line and GUI versions available
Cons
- Paid software
ImageOptim is a free app that makes images take up less disk space and load faster, without sacrificing quality.
Kraken.io is a cloud-based image optimization tool that helps users compress and resize images to improve website performance.
Starting from $5 per month
FileOptimizer is a lossless file size optimizer supporting various formats including audio, video, images, documents, etc.
pngquant is a command-line utility and a library for lossy compression of PNG images.
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