The Best CLI Alternatives in 2026

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

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.

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

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

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

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

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

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

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

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

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

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

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

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.

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.

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

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.

Gadfly provides statistical graphics and plotting tools for the Julia programming language.

draw.io provides a free, open source application for creating diagrams, with storage options chosen by each team.

Pie Chart Maker creates customizable pie charts and lets users download them as JPG, PNG, or SVG files.