Free MVP builder

Scope your MVP

Answer one step at a time: the problem, your users, a feature list ranked Must to Won’t, the journeys and screens, the numbers that prove it works, and a budget with your runway worked out. Get a brief a developer can price. Free, no sign-up, saved only in this browser.

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Step 1

Start your MVP brief

Name the product, choose who will read the brief and we set out the steps that reader expects. You can change either at any time.

Product name or working title

Who is the brief for?

Build briefFor a developer, studio or technical co-founder: the scope, journeys, build approach and budget they price from.10 steps · budget and runwayPre-seed MVP planFor angels, pre-seed funds and grant panels: problem, evidence, scope, team, runway and the raise.11 steps · budget and runwayValidation planTest demand before you build: your riskiest assumptions, the experiments and what counts as a pass.7 stepsOne-page MVP canvasThe short version: problem, users, value, the Must-have features and how you will measure success.5 stepsFull MVP plan (all sections)Every section in one document: for when you are not sure who will read it yet.14 steps · budget and runway

Or start from a worked example

A complete brief with realistic UK numbers. Change every answer to fit your product.

Bring back a saved brief

Load the backup (.json) you downloaded from the builder, on this or any device.

Choose a backup file

Still shaping the idea?

The Idea and Validate worksheets help you think it through first. Your notes appear here beside the steps they belong to.

Your brief is stored only in this browser on this device. We cannot see it, and clearing your browser data removes it, so download a backup now and then.