The Best PlantText Alternatives in 2026

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

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

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.

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

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

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

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

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

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

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

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.

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

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

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.

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

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.

Bar, line, area, and scatter charts can be created with dimple, an open-source charting API for D3.js.

amCharts provides JavaScript charting components, maps, stock charts, and Gantt charts.

Interactive charts for multidimensional datasets can be built with dc.js, a JavaScript library that supports Crossfilter.

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