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Cairn
€9/moStarting price
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About Cairn
Cairn is a browser-based diagram builder designed for speed, privacy, and ease of use. It operates entirely in the browser without requiring an account or cloud storage by default, ensuring diagrams remain local and private. The tool supports smart connectors, whiteboard-style elements, and AI-powered text-to-diagram conversion, allowing users to describe processes in plain language and generate diagrams automatically. It offers 106 templates across 15 categories, including flowcharts, business diagrams, and software designs, with full UI support in five languages. Diagrams can be exported in multiple formats such as PNG, SVG, PDF, JSON, and Mermaid, or shared via HTML viewers. The interface is designed to be intuitive, with features like layers, presentation mode, and a command palette for efficient workflows.
Key features
- Smart connectors with auto-routing arrows
- Whiteboard-style elements like sticky notes and frames
- AI-powered text-to-diagram conversion
- 106 searchable templates across 15 categories
- Multi-format exports: PNG, SVG, PDF, JSON, Mermaid
- Presentation mode for step-by-step walkthroughs
- Full UI in five languages: English, Portuguese, Spanish, French, German
- Multi-page support and tables in Pro edition
Use cases
- Creating flowcharts and process diagrams for business documentation
- Designing software architecture and system diagrams
- Collaborative whiteboarding with sticky notes and free text
Pros
- Runs entirely in-browser with no installation or account required for basic use
- Includes built-in AI text-to-diagram conversion without requiring an API key
- Supports local-first storage with optional cloud sync for Pro users
- Offers 106 templates across 15 categories for quick diagram creation
- Exports diagrams in multiple formats including PNG, SVG, PDF, and Mermaid
Cons
- Pro features require a paid subscription starting at €9/month
- No offline desktop application; requires a browser
- AI text-to-diagram feature is limited to Pro edition
Frequently asked questions about Cairn
What is Cairn?
Cairn is a browser-based diagram builder that prioritizes speed, privacy, and ease of use. It operates entirely in the browser without requiring an account or cloud storage by default, ensuring diagrams remain local and private.
Who is Cairn designed for?
Cairn is designed for users who need a fast, intuitive, and private way to create diagrams, including non-technical users, teams, and businesses looking for an alternative to tools like Visio or Lucidchart.
Does Cairn require an account to use?
No, Cairn does not require an account for its Basic edition. Users can start creating diagrams immediately without signing up. An account is only needed for Pro features like AI, cloud save, and sharing.
How does the AI text-to-diagram feature work?
The AI feature allows users to describe a process in plain language, and Cairn automatically generates a diagram based on the description. No API key is required, and the feature is integrated directly into the tool.
Can I use Cairn in languages other than English?
Yes, Cairn supports the full interface in five languages: English, Português, Español, Français, and Deutsch.
How can I export or share my diagrams?
Diagrams can be exported in multiple formats, including PNG, SVG, PDF, JSON, and Mermaid. They can also be shared via HTML viewers or embedded in platforms like Notion, websites, and documents.
