CompressO

Free plan LinuxMacWindows

What CompressO is

CompressO is a free, open-source application for compressing and converting video and image files on Linux, macOS, and Windows. Processing happens locally, and the site says files are never uploaded; no account is required, tracking is not used, and no data is collected. Batch processing, image resizing, and metadata controls are included. Image tools handle cropping, rotating, flipping, resizing, and quality or format settings for JPEG, PNG, WebP, and GIF. Video tools provide trimming, splitting, cropping, rotating, flipping, zooming, and controls for codec, quality, resolution, FPS, speed, and format. It supports formats such as MP4, MOV, and AVI and converts between image and video formats. Additional functions include SVG conversion, GIF creation and compression, before-and-after comparison, metadata editing, and custom video thumbnails. Files can be opened from a file manager or pasted from the clipboard. Video compression uses FFmpeg, and the project is under the MIT License.

Who it suits

CompressO fits casual and power users who need local media compression or conversion. It is available across Linux, macOS, and Windows without an account.

What it does well

Local processing; files are never uploaded
No account, tracking, or data collection
Batch processing and metadata controls
Supports JPEG, PNG, WebP, GIF, MP4, MOV, AVI
Free and open source under MIT License

What to know first

macOS app is not notarized by Apple
Debian 13 and Ubuntu 24 issue has no solution
Linux, macOS, and Windows are desktop platforms

Plans

Plan	Billed and limits	Price
Free	No file size limits · No watermarks · No premium tiers	Free

As compresso.codeforreal.com lists them, read 11 Oct 2026. The maker's own page has the final word.

Verdict

CompressO offers broad media editing and conversion tools while keeping processing on the device. Its free MIT-licensed model and privacy claims suit users who prefer local workflows.

Facts from CompressO's own pages

Additional tools: The site lists SVG conversion, GIF creation and compression, before-and-after comparison, metadata viewing and editing, and custom video thumbnails. · compresso.codeforreal.com, 11 Oct 2026
Batch processing: CompressO can process multiple videos and images at once and accepts entire folders for batch compression. · compresso.codeforreal.com, 11 Oct 2026
Compression engine: The site says video compression is powered by FFmpeg. · compresso.codeforreal.com, 11 Oct 2026
Formats: It supports major video formats such as MP4, MOV, and AVI and can convert among image and video formats. · compresso.codeforreal.com, 11 Oct 2026
Free plan: Yes · compresso.codeforreal.com, 24 Sept 2026
Image features: Image tools include cropping, rotating, flipping, resizing, and quality and format controls for JPEG, PNG, WebP, and GIF. · compresso.codeforreal.com, 11 Oct 2026
Integrations: The site says users can open files with CompressO from their file manager and paste files or directories from the clipboard. · compresso.codeforreal.com, 11 Oct 2026
Intended users: The site describes CompressO as a video processing tool for both power users and casual users. · compresso.codeforreal.com, 11 Oct 2026
License: The maker's site describes CompressO as open source under the MIT License. · compresso.codeforreal.com, 11 Oct 2026
Linux limitation: The project README says the app currently has no solution for an issue affecting Debian 13 and Ubuntu 24. · github.com, 11 Oct 2026
Mac security note: The project README says the macOS app is not notarized by Apple and explains that Homebrew installation removes the quarantine attribute. · github.com, 11 Oct 2026
Metadata controls: Yes · compresso.codeforreal.com, 24 Sept 2026
Offline processing: Compression happens locally, and the site says files are never uploaded. · compresso.codeforreal.com, 11 Oct 2026
Privacy: The site says CompressO requires no account, does not track users, and collects no data. · compresso.codeforreal.com, 11 Oct 2026
Purpose: CompressO is a free, open-source app for compressing videos and images. · compresso.codeforreal.com, 11 Oct 2026
Image resizing: Yes · compresso.codeforreal.com, 24 Sept 2026
Supported formats: JPEG,PNG,WebP,GIF · compresso.codeforreal.com, 24 Sept 2026
Video features: Video tools include trimming, splitting, cropping, rotating, flipping, zooming, and controls for codec, quality, resolution, FPS, speed, and format. · compresso.codeforreal.com, 11 Oct 2026

Where CompressO stands on Freedom251

Image Compression Software#26 of 85