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Oxipng review

Free#59 of 85 in Image Compression Software

A free, local command-line optimizer for developers working with PNG and APNG files.

3.5/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Oxipng is an open-source command-line utility and Rust library for developers and technical teams optimizing PNG and APNG files locally. It performs lossless compression, supports batch processing, and runs on Windows, macOS, and Linux. Its local design fits build pipelines, repositories, and other automated workflows where image optimization needs to happen without a hosted upload service. Docker support extends deployment to Linux environments, with images for linux/amd64 and linux/arm64.

Compression control is the main strength. Oxipng offers multithreaded processing and configurable optimization levels from 0 through 6 or max, allowing teams to choose how aggressively the tool processes files. Alpha optimization targets transparent images, while metadata controls can remove safe, all, or selected chunks. Because it supports both PNG and APNG, it is suited to projects that need lossless treatment for those formats while preserving image content. Rust library usage also gives developers a way to incorporate the optimizer into software rather than relying only on the command-line interface.

Workflow integration is focused rather than broad. Git pre-commit integration helps apply optimization before changes enter a repository, and Docker support can fit containerized Linux automation. The trade-off is that Oxipng is a technical tool, not a visual image-processing workspace: its command-line and library interfaces favor developers who are comfortable configuring local or automated processes. Teams working specifically with PNG or APNG should consider it when lossless output, metadata handling, and repository integration matter most. Those needing a wider format set or a browser-based upload workflow should choose a different type of image compression software.

Oxipng pros and cons

  • Where it wins
    • Multithreaded lossless compression with configurable levels
    • Metadata controls include safe, all, or selected chunk removal
    • Runs on Windows, macOS, Linux, Docker, and Git pre-commit workflows
  • Where it doesn't
    • Supports PNG and APNG rather than a broad range of image formats
    • Command-line operation suits technical users more than visual workflows
    • Local tooling requires integration into your own automation or development process

Oxipng fact sheet, pricing and score →

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