PNGOUT
PNGOUT: A free command-line utility for reducing PNG size without changing image data. Ranked #61 of 85 in Image Compression Software by our editors (3.3/10); pricing: Free plan; best for command-line users optimizing PNG files losslessly.
At a glance
- Editor score3.3 / 10
- PricingFree plan
- Best forCommand-line users optimizing PNG files losslessly
- Free planYes
- Paid fromFree
- Compression modesLossless
- Facts checked24 Sep 2026
Where it wins
- Lossless PNG optimization with configurable compression controls
- Supports PNG, GIF, BMP, JPG, TGA, and PCX input
- Runs on Windows, Linux, and Mac OS X desktop systems
Where it doesn't
- Command-line operation requires comfort with terminal workflows
- No batch-processing capability is provided
- Focused on PNG optimization rather than broad image-format output
Our verdict on PNGOUT
PNGOUT is a free desktop command-line utility for reducing PNG file sizes with lossless compression. It is intended for people optimizing images created by other tools, including website assets and game content. Windows is the primary platform, with official Linux and Mac OS X ports linked by the author. The workflow suits developers, technical artists, and teams that prefer scriptable controls over a graphical interface.
The published plan is straightforward: PNGOUT command-line is free for use and includes lossless PNG optimization. Its command-line options expose detailed control over PNG color type, bit depth, filtering, and compression strategy. You can also preserve or remove ancillary PNG chunks, which provides a way to manage metadata and related file components during optimization. The utility accepts PNG, GIF, BMP, JPG, TGA, and PCX input, while a Windows clipboard bitmap input option adds another desktop workflow.
PNGOUT’s narrow focus is its main trade-off. It optimizes PNG output and does not provide batch processing, so users managing large collections may need to create their own command-line workflow. There is no graphical interface in this product listing; PNGOUT command-line is distinct from the separately sold PNGOUTWin GUI. Documentation is the listed support channel. Choose PNGOUT when lossless PNG control, multiple raster inputs, and desktop command-line operation matter most. Users seeking a GUI-first process or built-in batch handling should consider another image-compression tool.
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PNGOUT fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Compression modes | Lossless |
| Batch processing | No |
| API access | Not verified |
| Max upload size | Not verified |
| Image resizing | Not verified |
| Supported formats | PNG, GIF, BMP, JPG, TGA, PCX |
| Metadata controls | Yes |
| Deployment | Desktop |
| Platforms | Windows, Linux, macOS |
| Support | Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | advsys.net |
| Facts checked | 24 Sep 2026 |
Alternatives to PNGOUT
- TinyPNGA flexible compressor for web workflows, batch processing, and automated image pipelines.9.3
- OptimoleA strong WordPress-focused optimizer for responsive images, modern formats, and CDN delivery.9.2
- ThumborA self-hosted image service with URL transformations, smart cropping, and format selection.9.1
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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