The Best Graphviz Alternatives in 2026

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

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

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

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

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

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.

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

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

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

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

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

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

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

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

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

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

Flowchart Fun generates flowcharts and diagrams from text through a web application.

torchvista visualizes a PyTorch model’s forward pass in notebooks and can export the visualization as an image, SVG, or HTML.

JSON Crack visualizes and edits JSON, CSV, YAML, and XML as interactive graphs, with formatting, querying, and validation tools.

Edotor provides a web-based editor for creating and editing Graphviz diagrams.

pygal provides Python tools for creating charts and visualizing data in applications.

ParaView analyzes and visualizes data across settings ranging from laptops to supercomputers, according to its project site.

Free open-source software for network visualization and analysis, with a desktop app and browser-based Gephi Lite for exploring graphs.