AltF IdeaLab

Lean canvas generator

The lean canvas generator gives you the nine standard lean canvas blocks, from Problem to Unfair advantage, each with a short prompt. It shows how many blocks are filled and lists the missing ones. It checks whether a block has content, not whether the content is right.

Free, no sign-up
Runs in your browser
No AI guesswork
Export to Markdown

Idea (1)

Name and one-line pitch

Lean canvas

Nine boxes on one page. Fill the problem and customer boxes first; leave unfair advantage blank until you really have one.

0 of 9 boxes filled0%

1Problem

Top 1-3 problems, in the customer's words.

2Customer segments

Who has the problem. Name the early adopters.

3Unique value proposition

One clear sentence on why you are different and worth attention.

4Solution

The smallest thing that solves each problem.

5Channels

How you will reach the first customers.

6Revenue streams

Pricing model and the price you will test.

7Cost structure

Main fixed and variable costs.

8Key metrics

The few numbers that show it is working.

9Unfair advantage

Something that cannot easily be copied or bought. Leave blank if none yet.

Autosaved in this browser only. Nothing is sent to AltFTool.

How to use the lean canvas generator

1
Start with the problem and segments
Write the top one to three problems in the customer's words and name the early adopters who have them.
2
Fill the value proposition and solution
Write one sentence on why you are different, then the smallest solution for each problem.
3
Add channels, revenue, costs and metrics
Note how you will reach the first customers, the price you will test, the main costs and the few numbers that show it works.
4
Check what is missing
Read the completeness count and the list of empty blocks. Leave Unfair advantage blank if you do not have one yet.
5
Export or print
Download the canvas as Markdown or JSON, or print it to share with a co-founder or mentor.

How it works

Nine blocks: Problem, Customer segments, Unique value proposition, Solution, Channels, Revenue streams, Cost structure, Key metrics and Unfair advantage.
A block counts as filled once it holds at least 8 characters after trimming spaces.
Completeness is filled blocks divided by 9, rounded to a whole percentage, with the empty blocks listed by name.
The canvas is saved with the idea in this browser and included in the Markdown export.

Worked example: a half-finished canvas

Problem, Customer segments, Unique value proposition, Solution and Channels each have a full sentence.

Revenue streams says only "$12/mo" (6 characters) and Key metrics says "Paid" (4 characters), so neither reaches the 8-character minimum.

Cost structure and Unfair advantage are empty.

Result: 5 of 9 blocks filled, 56%, with Revenue streams, Cost structure, Key metrics and Unfair advantage listed as missing.

What the lean canvas generator does not do

Completeness only checks that a block has text. It does not judge whether the text is accurate or specific.
A full canvas is a set of guesses until experiments back them up.
There is no shared editing; the canvas lives in one browser unless you export it.