CompressO review
A free, open-source desktop app for batch image and video compression offline.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
CompressO is a free, open-source desktop application for people who want to compress images and videos on their own computers. It runs on Windows, macOS, and Linux, and is aimed at individuals rather than teams seeking a shared cloud service. Its local, offline processing suits solo users and small workflows that prioritize keeping files on the desktop instead of uploading them to a service.
The image workflow combines batch compression with controls for quality, format, and dimensions. Users can crop, rotate, and flip images, convert among JPEG, PNG, WebP, and GIF, and preview compression results with before-and-after comparisons. Metadata preservation is also supported, which can matter when image information should remain attached through processing. These tools make CompressO more than a single-purpose compressor, though the documented format conversion scope is focused on those four image formats. The project also includes video editing and conversion features.
There is no subscription decision to weigh: CompressO is described as free, with no premium tiers. Its fit is clearest for people looking for local batch work across desktop systems and a combination of compression, resizing, editing, and conversion in one app. It is less suitable for workflows that depend on browser access, cloud collaboration, or an API. Choose it for an offline desktop process; consider another tool if integration with hosted services or a team workflow is central.
CompressO pros and cons
- Where it wins
- Batch-process images and videos offline on Windows, macOS, and Linux.
- Control image quality, formats, and dimensions; crop, rotate, or flip.
- Preview results and preserve image metadata while converting formats.
- Where it doesn't
- Desktop-only deployment does not offer a cloud workflow.
- Image conversions are limited to JPEG, PNG, WebP, and GIF.
- No paid tiers or API access are described.
CompressO fact sheet, pricing and score →
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
Last updated · How we research and update