Skip to the shop floor
Sign in Open your shop

FlowViz vs FreeOGImage

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 FreeOGImage
DetailFlowViz logo FlowVizFreeOGImage logo FreeOGImage
What it doesFree live Mermaid diagram editor with no signup required Free Open Graph image generator with no signup, no watermark, and no data uploads
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFree Free
PricingNot 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
  • 224+ customizable templates across product, editorial, developer, gaming, and more
  • Full browser-based editing with no server uploads
  • Pixel-exact exports at 2× resolution for high-DPI screens
  • Support for multiple platform sizes: Open Graph, X, LinkedIn, Facebook, Square
  • Deep customization controls for backgrounds, gradients, typography, logos, and effects
  • No signup, no watermark, no account required
  • Local storage saves designs only to your device
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
  • Genuinely free with no hidden paywalls or upgrade requirements
  • Privacy by architecture—no backend, no servers, no data collection
  • Maintained by independent developer with transparent editorial standards
Community votes00
DR (Domain Rating by Ahrefs)10 −4 (down) since last check28 −1 (down) since last check
Trust Flow (Majestic)520
Citation Flow (Majestic)2719
Referring domains (Majestic)76133

4 details filled in for both companies.

More alternatives to FlowViz More alternatives to FreeOGImage

Support