Codex Skin vs Mermaid Viewer

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Codex Skin compared with Mermaid Viewer
Detail	Codex Skin	Mermaid Viewer
What it does	Browse and apply curated themes for Codex Desktop on macOS and Windows	Free online Mermaid diagram viewer and editor with live preview, AI generation, and exports
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Freemium	Freemium
Pricing	Free: 6 published Free themes, free Plugin, offline Restore. Pro: US$9/year (Launch Sale, regularly US$19.90/year before applicable taxes), includes all 17 Pro themes, new releases, compatible updates, theme switching, and offline Restore. Renews annually until canceled. Manual refund requests withi	Free: unlimited editor and preview, 3 saved diagrams, 5 AI uses total, PNG export 1× with watermark. Starter: $6.99/month or $69.90/year; 30 saved diagrams, 500 AI conversations per month, PNG export up to 4× without watermark. Pro: $11.99/month or $119.90/year; unlimited diagrams, unlimited AI, PNG
Key features	Browse curated theme gallery Apply themes from inside Codex Switch or restore themes with confidence Free open-source Plugin Data-only theme packages Automatic rollback on apply failure Offline restore of official interface Device authorization and approval flow Compatible with macOS and Windows Compatibility verification before applying themes	Live preview of Mermaid code as you type AI diagram generator, editor and syntax fixer PNG export on every plan; JPG, SVG and PDF on Pro All 22+ Mermaid diagram types supported Share diagrams via public links and embeds Save diagrams to cloud with folders and version history Keyboard shortcuts and autocomplete Mobile-responsive editor with pan and pinch-zoom
What makes it different	Reversible and safe theme changes with offline restoration available without login or active subscription Data-only theme packages that cannot execute code or access conversations and projects No remote DRM or removal of appearance already on user's computer Free themes always available plus affordable Pro subscription with new releases included Compatibility checks and automatic rollback protect workspace integrity	No account or sign-up required to start editing diagrams Affordable pricing: Starter at $6.99/month, Pro at $11.99/month Diagrams render in your browser; nothing stored unless you choose to save Fast editor with instant rendering and clear error messages
Community votes	0	0
DR (Domain Rating by Ahrefs)	14 −1 (down) since last check	6 +1 (up) since last check
Trust Flow (Majestic)	18	3
Citation Flow (Majestic)	20	23
Referring domains (Majestic)	41	12

5 details filled in for both companies.

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