Your idea,
on one page.
Fill in a lean canvas box by box, then name your riskiest assumption and the cheapest way to test it. It saves in your browser as you type.
Saved in this browser only. Nothing is sent to us.
The top one to three problems your customer has. Write them in their words.
Who has the problem. Be specific enough to find them this week.
One clear sentence: why you, and why it matters. What will make someone stop and look?
The smallest set of features that solves the top problems. Three is plenty.
How you will reach customers. Start with the ones you can use for free.
How you make money: model, price idea, who pays.
What it costs to build, run and sell. Fixed and per customer.
The few numbers that tell you it is working.
Something that can’t easily be copied or bought. “None yet” is an honest answer.
Riskiest assumption and cheapest test
The belief that, if wrong, sinks the idea. Usually about whether people have the problem or will pay.
The fastest, cheapest way to find out, before building anything.
Decide the bar before you run the test, so the answer is clear.
How this works
The lean canvas is Ash Maurya’s one-page adaptation of the Business Model Canvas. The boxes are numbered in the order he suggests: problem and customer first, then the value you offer, then everything else.
We added one step most canvases skip: pick the riskiest assumption, the cheapest test for it, and the result that means go. That turns a filled-in page into something you can act on this week.
Your canvas is saved in this browser’s local storage as you type. Nothing leaves your device. Print it to PDF from your browser’s print dialog, or copy it as Markdown for a doc or a note. You can also open this page with ?idea= and a line of text to start with the idea filled in.