Open Source Design & Visualization Software
Design & Visualization tools provide digital canvases for creating flowcharts, wireframes, and network diagrams. These tools replace physical whiteboards and static documents by allowing users to sketch visual ideas and map out complex processes in a flexible environment. This type of software suits designers and engineers who need to document technical architectures or brainstorm layouts. Self-hosting these apps ensures that proprietary diagrams and internal system maps remain on private servers rather than on external cloud platforms.
This page lists 11 open source tools in the Design & Visualization category. The most popular are Excalidraw, Affine and Draw.io. Most use the MIT or Apache-2.0 license, and 5 offer an official Docker image.
Excalidraw
A virtual whiteboard for sketching diagrams, flowcharts, and wireframes with a hand-drawn style and real-time collaboration.
Affine
A local-first knowledge base that merges structured documents, infinite whiteboards, and databases into one workspace.
Draw.io
Create flowcharts, network diagrams, and organizational charts using a local desktop editor for visual documentation.
Tldraw
An infinite canvas engine for building collaborative whiteboarding and diagramming applications within React based web environments.
Graphite
A nondestructive vector and raster graphics engine combining layer based compositing with a node based generative workflow.
OpenPencil
A design editor for creating visual interfaces with AI integration and native Figma file support.
draw.io
Create diagrams and whiteboards through a configurable editor that supports various storage integrations and offline desktop use.
WBO
A collaborative whiteboard for simultaneous drawing and real time state persistence on a large virtual board.
Ray.so
Convert code snippets into images with customizable syntax highlighting, background options, and light or dark window themes.
Chalk.ist
Generates customizable images of source code for use in technical documentation, presentations, and social media posts.
wastebin
A minimal self-hosted pastebin for storing and sharing text snippets with encryption and markdown support.
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