Build a SaaS MVP This Weekend: Free Tools + Zero Code

You have an idea. You have a weekend. You don't want to spend $10K and six months building before you know if anyone will pay. This guide is the actual path from idea to live, paying-customer-ready MVP in two days — using only free tools.

What "MVP" Actually Means Here

The goal isn't to build every feature. It's to build the one thing that proves your core value proposition with real users, and collect either money or strong signals that money is coming. Everything else is distraction. A landing page that collects emails isn't an MVP — it's a placeholder. This guide builds a working product.

Saturday Morning: Define and Design (3 hours)

Write down your product's core loop in one sentence: "User does [X], gets [Y] value, pays [Z] to keep getting it." If you can't write this sentence clearly, you're not ready to build yet — spend more time here.

Then wireframe your interface using Excalidraw (free, browser-based). Sketch the minimum screens needed: landing page, dashboard/main view, and account/settings. You don't need design software for this phase.

Saturday Midday: Build the Frontend (4 hours)

Open Claude or ChatGPT and generate your HTML/CSS/JS. Be specific:

• "Build a responsive dashboard that shows [your data] in cards with a sidebar navigation"
• "Build a pricing page with three tiers: Free, Pro at $9.99/mo, Enterprise. Include a comparison table."
• "Build a login form that submits to Supabase auth with email/password"

Iterate until each piece looks right in the browser. Aim for consistent design — same fonts, same color palette, same button styles across all pages. Save files to a GitHub repo as you go.

Saturday Afternoon: Set Up the Backend (3 hours)

Supabase is your free backend. Create an account, spin up a new project, and you get:

• A Postgres database (500MB free)
• Authentication (email, OAuth, magic links)
• File storage (1GB free)
• Auto-generated REST and GraphQL APIs
• Edge functions for custom server logic

Use Claude to generate the Supabase JavaScript client code for your specific data model. "Write the Supabase JS code to insert a new row to a table called [X] with fields [Y] and [Z], then redirect to the dashboard." This is faster than reading documentation.

Saturday Evening: Billing (2 hours)

Stripe handles payments. Create an account (no monthly cost), set up a product and price, and generate a Payment Link (no code required — Stripe provides a hosted checkout page). Embed the link as your "Upgrade" button.

For the MVP, a Stripe Payment Link is enough. You don't need a full subscription management system yet. When someone pays, Stripe sends a webhook — have it update a field in your Supabase database that unlocks premium features.

Sunday Morning: Deploy and Test (3 hours)

Push your code to GitHub. Connect your GitHub repo to Cloudflare Pages (free). Add your domain or use the free yoursite.pages.dev subdomain. Configure environment variables (your Supabase URL, API keys) in Cloudflare Pages settings.

Test every user flow manually:

1. Sign up
2. Use the core feature
3. Hit the paywall
4. Complete checkout
5. Access premium features

Sunday Afternoon: Launch (2 hours)

Write a launch post for wherever your audience lives — X, Reddit, HackerNews, Product Hunt, LinkedIn. Be honest: "I built this over the weekend, here's what it does, here's the free tier, here's what Pro costs." Authenticity outperforms polish for early-stage launches every time.

Set up Google Search Console and submit your URL. Create a Mailchimp free account and add a "get updates" email form to your landing page. Every early signup is future revenue.

What to Do on Monday

Check your analytics. See if anyone signed up. If they did, email them directly and ask what made them sign up. If nobody signed up, ask yourself: did I actually share it with people who'd want it? Did the landing page communicate the value clearly? Did the product work on mobile? Fix the most obvious issue and share again. That's the actual process.