Create any diagram using AI, for free
Just describe what you want in plain English and FreeDiagram draws it for you — flowcharts, mind maps, timelines, family trees, and 25+ types. Always free, unlimited, and instant — online in your browser, no signup.
Free forever · no signup · no credit card · unlimited diagrams
25+ diagrams you can make — all free
Click any one to start with a ready-made prompt. Every type is free, unlimited, and needs no signup.
From a sentence to a diagram in four steps
Describe it in plain English
Type what you want, however rough — a single sentence is enough to start.
We pick the diagram type
FreeDiagram reads your description and chooses the format that fits best, across 25+ types — you don't need to know its name.
Your diagram gets drawn
Your words are turned into a clean, ready-to-use diagram in seconds.
Download or tweak it
Save it as SVG or PNG, or copy the source to adjust it and draw again.
Frequently asked questions
Is FreeDiagram really free?
Yes — completely free, unlimited, with no signup, no credit card, and no watermark. The site is funded by ads, so it stays free for everyone.
Do I need an account?
No login, no sign-up. Just open the page, describe your diagram, and generate it. Nothing you type is saved.
What can I make?
25+ kinds of diagram, and we pick the right one for you: flowcharts, mind maps, charts, timelines, org charts, family trees, ER diagrams, and many more.
Do I need design skills?
Not at all. If you can describe it in a sentence, you can make it — there's nothing to drag, draw, or line up by hand.
Can I download or edit it?
Yes — download a sharp SVG or a high-resolution PNG, or copy the diagram source to fine-tune it and draw again.
Is my data stored?
No. Your prompt and the diagram are not saved on our servers — each request stands alone, and closing the tab leaves nothing behind.
Diagram types with their own page
Open a dedicated generator for the diagram you need — each is free, unlimited, and needs 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 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 Ladder Logic Maker
Draft PLC programs, motor control circuits, and industrial automation logic visually — 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 Pedigree Chart Maker
Map hereditary disease patterns, inheritance modes, and carrier status across generations — 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 Ecomap Maker
Map a client's support network, identify resource gaps, and visualize relationship strengths — no signup, no cost.
Free Genogram Maker
Map family relationships, emotional bonds, and intergenerational patterns — no signup, 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 BPMN Maker
Model business processes with BPMN 2.0 — swimlanes, gateways, events, and tasks. No signup, no install, fully free.
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, unlimited, 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, unlimited, 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, unlimited, no signup.
Free AI Circuit Diagram Maker
Describe any electronic circuit and FreeDiagram draws the schematic instantly — components, connections, and values. Free, unlimited, no signup.
Free AI Decision Tree Maker
Describe any decision and FreeDiagram maps it as a tree of choices, conditions, and outcomes — free, unlimited, 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, unlimited, 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, unlimited, 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, unlimited, no signup.
Free AI Flowchart Maker
Describe any process in plain English and FreeDiagram draws the flowchart instantly — decision branches, loops, and all. Free, unlimited, no signup.
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, unlimited, no signup.