The Best Flowchart Fun Alternatives in 2026

Mermaid generates diagrams such as flowcharts and sequence diagrams from text using syntax similar to Markdown.

Kroki CLI converts diagram files through the Kroki service, inferring diagram type from the file extension by default.

Flowchart Fun converts text into flowcharts, mind maps, and process diagrams through an online text-based editor.

DiagramGPT generates diagrams from text prompts, with the project page describing diagram workflows for teams.

PlantUML generates UML and other diagrams from textual descriptions and exports results in formats including PNG, SVG, and PDF.

Kroki provides one API for generating diagrams from textual descriptions using libraries such as Mermaid, PlantUML, Graphviz, and D2.

Tree generates ASCII diagrams of folder structures as a browser utility written in TypeScript and React.

PlantText provides an online editor for PlantUML code and generates class, sequence, activity, and state diagrams.

Cascii Core builds ASCII and Unicode diagrams in a browser using vanilla JavaScript, without server or library dependencies.

Swimlanes.io creates sequence diagrams from text in a browser and lets users download diagrams or share them through links.

text2diagram creates diagrams and charts from text descriptions, with real-time collaboration and document permissions listed on its page.

Dia is free, open source drawing software for structured diagrams, with downloads, shapes, and documentation.

UMLet provides free, open source UML drawing with a simple interface for making diagrams, including sequence and activity diagrams.

SankeyMATIC builds flow diagrams for comparing quantities across stages, with examples covering budgets, results, and processes.

Graphviz creates diagrams from graph descriptions and provides open-source software for visualizing structural information.

Mermaid Live Editor creates charts and diagrams from text using Mermaid’s markdown-like syntax in a browser.

JDL-Studio draws UML diagrams from JDL syntax and provides instant feedback with customizable styling.

In a browser, yEd Live supports diagram creation, import, editing, and automatic arrangement for free.

SolidUI generates graphs from a sentence, according to its repository description.

Svgbob converts text-based ASCII diagrams into SVG graphics, with both a library and command-line interface.

The bqplot project provides plotting tools for IPython and Jupyter notebook environments.

JSON Crack is an open source visualization application that turns JSON, YAML, XML, and CSV data into interactive graphs.

RAWGraphs App provides a web interface for creating custom vector-based visualizations with the RAWGraphs core.

The globe library creates wireframe visualizations of a sphere using Go code.