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Caesium Image Compressor alternatives: 1 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave Caesium Image Compressor: no official Linux build on the download page, and interface is functional rather than polished. We ranked 1 alternatives by how directly each one replaces Caesium Image Compressor, then by reviews, real visits and how recently each app's facts were checked against its own website. ImageOptim currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1ImageOptim logoImageOptimOpen sourceYesmacOS4 of 466.5
  1. ImageOptim logo

    1. ImageOptimTop pick

    Best for: Mac users who want a free drag-and-drop compressor for web and app images

    Open sourcemacOS

    66.5

    score / 100

    Why switch from Caesium Image Compressor

    A free Mac app that runs several optimisers per file and strips metadata automatically.

    Pros

    • Free and open source, with no limits on files
    • Combines several best-in-class optimisers automatically
    • Strips GPS and camera metadata for privacy

    Cons

    • Mac only
    • Can be slow on large PNGs with Zopfli and PNGOUT enabled
    • No WebP or AVIF conversion in the Mac app
    Visit ImageOptim Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is ImageOptim a good Caesium Image Compressor alternative?

    Verified facts

    4 of 4 verified
    License
    GPL-2.0
    Checked Nov 1, 2026github.com(opens source in a new tab)
    Requirements
    macOS 11 or later
    Checked Nov 1, 2026imageoptim.com(opens source in a new tab)
    Bundled optimisers
    MozJPEG, pngquant, Pngcrush and more
    Checked Nov 1, 2026imageoptim.com(opens source in a new tab)
    Mac App Store
    Not available
    Checked Nov 1, 2026imageoptim.com(opens source in a new tab)

The best Caesium Image Compressor alternative for…

The highest-ranked app in this list for each need.

ImageOptim logo

Best Caesium Image Compressor alternative for most people

ImageOptim

A free Mac app that runs several optimisers per file and strips metadata automatically.

ImageOptim logo

Best Caesium Image Compressor alternative for a free option

ImageOptim

A free Mac app that runs several optimisers per file and strips metadata automatically.

ImageOptim logo

Best Caesium Image Compressor alternative for open source

ImageOptim

A free Mac app that runs several optimisers per file and strips metadata automatically.

ImageOptim logo

Best Caesium Image Compressor alternative for Mac

ImageOptim

A free Mac app that runs several optimisers per file and strips metadata automatically.

Caesium Image Compressor alternatives: common questions

What is the best alternative to Caesium Image Compressor?

ImageOptim ranks first right now. A free Mac app that runs several optimisers per file and strips metadata automatically.

Is there a free alternative to Caesium Image Compressor?

Yes. ImageOptim (open source) has a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Caesium Image Compressor?

Yes: ImageOptim.

Why do people switch from Caesium Image Compressor?

The complaints we hear most: no official Linux build on the download page; interface is functional rather than polished.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Caesium Image Compressor, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.