ACACIA
ACACIA: A focused free tool for solo users targeting JPEG or WebP quality and file size. Ranked #72 of 85 in Image Compression Software by our editors (3.0/10); pricing: Free plan; best for solo users targeting JPEG or WebP quality and size.
At a glance
- Editor score3.0 / 10
- PricingFree plan
- Best forSolo users targeting JPEG or WebP quality and size
- Free planYes
- Paid fromFree
- Compression modesLossy
- Facts checked24 Sep 2026
Where it wins
- Targets image-quality or file-size metrics per image
- Machine-learning predictions adjust compression strength
- GUI plus CLI batch processing on Windows and Linux
Where it doesn't
- Supports only JPEG and WebP encoding
- Lossy compression only
- Maintainers describe it as research software, not production software
Our verdict on ACACIA
ACACIA is a free, open-source desktop image compressor for solo users who need to control image quality or file size when encoding JPEG or WebP images. It offers both a graphical interface and a command-line interface, so users can work interactively or process batches from a terminal. Builds are described for Windows and Linux, making it suited to individual workflows on those platforms.
Its defining capability is metric-targeted compression. Users can select an image-quality or file-size objective, and ACACIA uses machine-learning predictions to adjust compression strength for each image. This content-adaptive approach is more specific than choosing a single fixed quality setting for every file. The project is released under GPL-3.0, with no paid tier described, so the full feature set is available without a subscription or license fee.
ACACIA remains narrowly focused. Encoding is limited to JPEG and WebP, compression is lossy, and there is no API access listed for integrating the tool into hosted services or larger application pipelines. The maintainers describe it as a demonstration of research techniques rather than production software, which matters for teams needing operational guarantees or broad format coverage. Choose ACACIA for individual batch work where targeted JPEG or WebP metrics matter; choose another tool if you need additional formats, lossless modes, API-based deployment, or production-oriented support expectations.
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ACACIA pricing
ACACIA fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Compression modes | Lossy |
| Batch processing | Yes |
| API access | No |
| Max upload size | Not verified |
| Image resizing | Not verified |
| Supported formats | JPEG, WebP |
| Metadata controls | Not verified |
| Deployment | Desktop |
| Platforms | Windows, Linux |
| Built for | Solo (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 24 Sep 2026 |
Alternatives to ACACIA
- 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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