System design is the case nested diagrams were built for. The top board stays readable as a handful of services, and each service opens into the board that explains it. Use these as study material for interviews, or as the starting point for documenting your own system.
Browse real flowcharts made with Gramit. Open any one of them in the editor, change it, and keep it. Free, no account needed.
Software architecture diagrams with real depth: every component opens into its own board. Free to open and edit.
Cloud architecture and infrastructure diagrams you can open and edit for free. AWS, networking, deployment topologies and more.
Entity relationship diagrams and database schemas you can open, edit and export. Free, no account needed.
Network topology diagrams you can open, edit and export for free. No account, no signup wall.
Mind maps you can open and edit for free. Branches can nest as deep as your thinking goes.
Organisation charts you can open, edit and export for free. No account needed.
Nothing here quite right? Start from an empty board.