All diagram types
Every diagram you can make — free, no signup, with hourly fair-use limits.
Free AI Mind Map Maker
Describe any topic in plain English and FreeDiagram builds a clear, structured mind map instantly — central idea, branches, and sub-branches. Free, hourly fair-use limited, no signup.
Free AI Flowchart Maker
Describe any process in plain English and FreeDiagram draws the flowchart instantly — decision branches, loops, and all. Free, hourly fair-use limited, no signup.
Free Timeline Maker
Describe any sequence of events and FreeDiagram draws a clean, professional timeline instantly — dates, milestones, and labels all arranged. Free, hourly fair-use limited, no signup.
Free Venn Diagram Maker
Describe the sets and their overlaps in plain English and FreeDiagram draws the Venn diagram instantly — intersections, exclusive regions, and labels all placed. Free, hourly fair-use limited, no signup.
Free Org Chart Maker
Describe your team or organization in plain English and FreeDiagram draws the org chart instantly — hierarchy, reporting lines, and roles all laid out. Free, hourly fair-use limited, no signup.
Free AI Fishbone Diagram Maker
Describe any problem and FreeDiagram draws the Ishikawa (cause-and-effect) diagram instantly — categories, causes, and effect. Free, hourly fair-use limited, no signup.
Free AI Decision Tree Maker
Describe any decision and FreeDiagram maps it as a tree of choices, conditions, and outcomes — free, hourly fair-use limited, no signup.
Free AI Circuit Diagram Maker
Describe any electronic circuit and FreeDiagram draws the schematic instantly — components, connections, and values. Free, hourly fair-use limited, no signup.
Free AI Logic Gate Diagram Maker
Describe any Boolean logic circuit and FreeDiagram draws the gate diagram instantly — gates, inputs, outputs, and signal flow. Free, hourly fair-use limited, no signup.
Free ER Diagram Maker
Describe your database schema in plain English and FreeDiagram draws the entity-relationship diagram instantly — entities, attributes, and relationships included. Free, hourly fair-use limited, no signup.
Free Timing Diagram Maker
Describe your digital signals or communication protocol and get a clear timing diagram in seconds. Perfect for SPI, I2C, UART, FPGA, and embedded systems documentation. No account needed.
Free Phylogenetic Tree Maker
Describe your organisms or sequences and get a publication-ready phylogenetic tree in seconds. No bioinformatics software, no account, no cost.
Free State Diagram Maker
Model what your system IS at any moment — states, transitions, guards, and events. BPMN tells you what it does; a state diagram tells you what it is.
Free Genogram Maker
Map family relationships, emotional bonds, and intergenerational patterns — no signup, no cost.
Free Ecomap Maker
Map a client's support network, identify resource gaps, and visualize relationship strengths — no signup, no cost.
Free P&ID Maker
Describe your process system and get a professional Piping and Instrumentation Diagram in seconds. No account, no software, no cost.
Free Pedigree Chart Maker
Map hereditary disease patterns, inheritance modes, and carrier status across generations — no signup, no cost.
Free Single-Line Diagram Maker
Describe your electrical power system and get a professional single-line diagram in seconds. No account, no software, no cost.
Free Ladder Logic Maker
Draft PLC programs, motor control circuits, and industrial automation logic visually — no signup, no cost.
Free Breadboard Wiring Maker
Describe your electronics circuit and get a clear breadboard wiring diagram in seconds. Perfect for Arduino projects, classroom labs, and maker tutorials. No account needed.
Free BPMN Maker
Model business processes with BPMN 2.0 — swimlanes, gateways, events, and tasks. No signup, no install, fully free.