Diagram Editors

Privacy-focused diagramming software supporting real-time collaboration, offline mode, and cloud storage without ads or registration.

Web-based vector graphics editor with desktop apps, focusing on real-time collaboration and version control for UI/UX design.

Draw lets you produce anything from a quick sketch to a complex plan, and gives you the means to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is a an excellent package for producing technical drawings, general posters, and much else.

Excalidraw is an open-source whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them. Available directly online as a web app and also through CodeSandbox to easily see how the code works, and the app is available for self-hosting.

Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.

yEd is a powerful diagram editor that can be used to quickly create diagrams manually or import external data for analysis and auto-magically arrange even large data sets by just pressing a button. You can use yEd to quickly create flow charts, BPMN and UML diagrams...

Open-source diagram editor with cross-platform support offering entity relationship, UML, flowchart, and network diagram creation with editable objects.

A scalable tool for real-time and asynchronous team collaboration across devices with an infinite canvas, suitable for strategy planning and real-time feedback.

DeepNotes is an open source, end-to-end encrypted visual note-taking app with deep page navigation and live collaboration. Create mind maps, diagrams, kanban boards, among others. Infinite nesting of infinite canvases.

Cloud-based tool for diagramming and collaboration, with 20M users globally, supports Visio import/export and features UML modeling and more.

Easily create data-connected diagrams with real-time collaboration, part of Office Suite. Ideal for IT and business professionals visualizing complex info.

LimanDoc is a simple yet powerful tool for visualize files, diagrams, and construct a mind map with the possibility to edit Markdown text. It is an offline first desktop app with a 2D canvas that allows a preview of the inner folders (boards).

PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. The generator can be run anywhere within JVM and integrated with various application such as wiki, text editor, IDE, programming language, documentation generator, and others.

Ever wanted to simplify documentation and avoid heavy tools like Visio when explaining your code? This is why mermaid was born, a simple markdown-like script language for generating flowcharts, Gantt charts and sequence diagrams from text via JavaScript.

Powerful web-based editor for creating detailed commutative diagrams, exporting them to LaTeX with embedded links for easy sharing and re-editing.

Whimsical is a collaborative visual workspace for creating flowcharts, wireframes, virtual sticky notes, and more!.

tldraw is a collaborative digital whiteboard available at tldraw.com. Its editor, user interface, and other underlying libraries available in this repository and also distributed on npm. You can use tldraw to create a drop-in whiteboard for your product or as the foundation on...

Digital graph paper for diagrams, technical sketches and geometric art.

Graphviz is open source graph visualization software. Graph visualization is a way of representing structural information as diagrams of abstract graphs and networks. It has important applications in networking, bioinformatics, software engineering, database and web design...

Google Drawings, part of Google Drive, allows users to collaborate creating, sharing, and editing images or drawings. It can be used for creating charts, diagrams, designs, flow-charts, etc.

OmniGraffle can help you make eye-popping graphic documents—quickly—by providing powerful styling tools, keeping lines connected to shapes even when they’re moved, and magically organizing diagrams with just one click.

Lorien is an infinite canvas drawing/note-taking app that is focused on performance, small savefiles and simplicity. It's not based on bitmap images like Krita, Gimp or Photoshop; it rather saves brush strokes as a collection of points and renders them at runtime (kind of...

Creates diagrams from textual descriptions! It provides a unified API with support for BlockDiag, BPMN, Bytefield, C4 (with PlantUML), Ditaa, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, SvgBob, UMLet, Vega, Vega-Lite, WaveDrom.

Visual Paradigm for UML (VP-UML) is a UML design tool and UML CASE tool designed to aid software development. VP-UML supports key modeling standards such as Unified Modeling Language (UML) 2.4, SysML, ERD, DFD, BPMN 2.0, ArchiMate 2.0, etc.

Simple web based ascii flow diagram drawing tool, draw boxes, lines, arrows and type, then export straight to text/html.