Seashore review
A capable free Mac editor for everyday layered image work.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Seashore is a free, open-source image editor for Mac users who need common image manipulation tools without a paid plan. Its layer-based workflow covers everyday editing, while text, selection, wand, filter, brush, smudge, cropping, scaling, and auto-enhance tools support a broad set of basic tasks. SVG and WebP support add useful format flexibility, and printing makes it suitable for preparing images for physical output. The app runs on macOS 10.9 or later and is available through the Mac App Store.
Its feature set is strongest for straightforward desktop editing rather than advanced production workflows. Layers and masking provide structure for compositing, while selections, brushes, filters, and text editing cover practical adjustments and annotations. SVG and WebP support are useful for users working with modern or web-oriented image files. The free Mac App Store download keeps access simple, with no paid tier or upgrade path to evaluate. Users who want a focused, no-cost editor for resizing, cropping, retouching, and layered compositions should find the scope relevant.
Seashore is less suitable for photographers or teams that depend on RAW processing, batch editing, cloud synchronization, or AI retouching. Platform fit is also narrow because it runs on macOS. Development has been deprioritized in favor of the developer’s newer Seahorse application, and ongoing support is focused mainly on later macOS compatibility and critical bug fixes. Choose Seashore for free, local image editing on a Mac; choose an alternative if current feature expansion, broader platform coverage, or specialized photo workflows are priorities.
Seashore pros and cons
- Where it wins
- Layer-based editing with selections, masks, filters, and text tools
- Supports SVG and WebP images, plus cropping and scaling
- Free, open-source Mac app with printing and auto-enhance tools
- Where it doesn't
- Runs only on macOS
- No RAW, batch editing, cloud sync, or AI retouching
- Development is deprioritized, with maintenance focused on compatibility and critical bugs
Seashore fact sheet, pricing and score →
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