FlowViz vs AdViewport

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

FlowViz compared with AdViewport
Detail	FlowViz	AdViewport
What it does	Free live Mermaid diagram editor with no signup required	Free ad mockup generator for eight platforms
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Live preview as you type 21 diagram types including flowcharts, sequence, class, state, ER, Gantt, git graph, mindmap and timeline Two-way editing for flowcharts SVG and PNG export Share diagrams as URLs with embedded diagram content Built-in template picker and cheatsheet No account or signup required Works entirely in browser with local storage Open Mermaid Live Editor links Mermaid v11 syntax support	Eight platform previews including Facebook, Instagram, Google Ads, LinkedIn, X, Snapchat, TikTok, and YouTube Device and canvas control across desktop, mobile, square, landscape, portrait, and story formats Immediate visual feedback on copy, CTA, format, and creative changes Export in PNG, JPG, or SVF formats Shareable reproducible review links Browser-based processing with no uploads to servers No account or sign-up required
What makes it different	No signup, paywall, or data collection required Diagrams stay in your browser's local storage by default Two-way editing that updates code when you edit the canvas Live preview with no render button required Clean SVG export for professional use in docs and slides	All eight major ad platforms in one workspace Completely free with no account needed Images stay private in your browser Production-ready exports for approvals and presentations
Community votes	0	0
DR (Domain Rating by Ahrefs)	10 −4 (down) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	5	0
Citation Flow (Majestic)	27	21
Referring domains (Majestic)	76	26

4 details filled in for both companies.

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