With Squoosh's engines: WebP, AVIF, JPEG XL, MozJPEG, OxiPNG and QOI. The same file as the official tools, and you see the result right away.
Version 0.12.0 · macOS, Windows and Linux · free and open source (GPLv3)
You compare the original and the compressed image with a slider, see how much it weighs and where quality is lost, and adjust until you're happy.
cwebp, cjpeg, oxipng, avifenc and cjxl are
built into Apolo and produce the same file, byte for byte. You use all their options while you watch, and
copy the equivalent command.
SSIMULACRA 2, PSNR and SSIM, a map of where detail is lost, and quality by score: Apolo finds the lowest quality that can't be told apart from the original.
You fine-tune one image, save the setting as a preset and apply it to whole folders, with their subfolders and without overwriting anything.
Like in Squoosh, and in any format: cropping with the mouse, with aspect ratios.
HEIC, as well as PNG, JPEG, WebP, AVIF, JPEG XL, TIFF, GIF, BMP, QOI and PNM, and auto-rotates them by their orientation.
Your images never leave your computer. With 24-megapixel photos it stays around 2 GB of memory, even in batches of hundreds: it fits on an 8 GB Mac.
Differences mode paints where the result drifts from the original. With the SSIMULACRA 2 score, the same one libjxl's tool gives, you know whether it will show before you publish.
Drop a folder on Batches and it converts it in parallel, to one or more formats, with a preset or aiming for a score.
photo-2.webp.
From Claude, Cursor, VS Code or any agent that speaks MCP: it analyzes, optimizes, compares formats at the same quality, measures, crops and converts folders, with Apolo's engines and on your computer. It never overwrites or deletes.
The server comes with the app and updates with it. In Apolo, the MCP row has what to copy for each agent and the Claude Desktop extension. In Claude Code:
# macOS claude mcp add --scope user apolo -- "/Applications/Apolo.app/Contents/MacOS/apolo-mcp" # Windows claude mcp add --scope user apolo -- "%LOCALAPPDATA%\Apolo\apolo-mcp.exe" # Linux (.deb) claude mcp add --scope user apolo -- /usr/bin/apolo-mcp
apolo does the same as the window, with the same presets, for your scripts.
apolo webp, jpeg and png take the options of cwebp,
cjpeg and oxipng; apolo avif and jxl are
avifenc and cjxl.
# With Homebrew, on macOS and Linux
brew install webcafeina/apolo/apolo
apolo webp -q 80 photo.jpg -o photo.webp
apolo avif -q 60 photo.png photo.avif
apolo lote photos/ --formato webp,avif --mas-ligero
apolo medir photo.png photo.webp
Also in the downloads, without Homebrew. It speaks your system's language; force English
with --idioma en.
Version 0.12.0. Once installed, Apolo tells you about new versions and updates itself with one click.
| System | App | Command line | Claude Desktop |
|---|---|---|---|
| macOS 11 or later Apple Silicon and Intel |
.dmg | tar.gz | .mcpb |
| Windows 10 and 11 x64 |
.exe | zip | .mcpb |
| Windows 10 and 11 ARM64 |
.exe | zip | .mcpb |
| Debian 12+ and Ubuntu 22.04+ amd64 |
.deb · AppImage | tar.gz | — |
| Debian 12+ and Ubuntu 22.04+ arm64 |
.deb · AppImage | tar.gz | — |
Apolo isn't signed: open it and, in System Settings › Privacy & Security, click “Open Anyway”. If it
says it's damaged: xattr -dr com.apple.quarantine /Applications/Apolo.app. Or with Homebrew:
brew install --cask webcafeina/apolo/apolo.
SmartScreen warns because it isn't signed: “More info” › “Run anyway”.
With the package, sudo apt install ./Apolo_X.Y.Z_amd64.deb. The AppImage: chmod +x
and open it.
All versions on GitHub,
with SHA256SUMS.txt to check every file.