So you've built something with a vibe coding tool and you're thinking about launching it to the world.
Cool. But let's be real for a second — are you actually ready?
Beyond the obvious challenge of getting users (that's a whole separate battle), there are a few fundamentals most people completely overlook. Not because they're lazy, but because the tools that helped you build the thing never mentioned them.
Why listen to me?
I've spent 20+ years writing and debugging code, and over five years specialising in performance and security for global-scale applications. I've seen what happens when things go wrong at scale — and in the vast majority of cases, it's preventable.
This isn't an exhaustive guide. These are the non-negotiables.
1. Protect Yourself First
Before anything else, you need to reduce your personal risk.
If your app collects or processes user data — even something as simple as an email address on a waitlist form — you're now operating inside GDPR, UK PECR, and a growing list of other compliance frameworks. That means:
- A privacy policy that actually explains what you collect and why
- Clear data handling and retention practices
- Consent mechanisms before you fire tracking pixels or set non-essential cookies
- Secure storage practices for anything sensitive
Ignore this, and you're not just shipping a product — you're exposing yourself legally. The fines are real. The reputational damage is worse.
Prompt to try:
"Review my app's data handling and tell me what a GDPR audit would flag as a risk. Identify any areas where I might be collecting data without clear consent or a lawful basis."
2. Protect Your Users (Fast Win)
Security isn't optional. It's part of your product — and it's part of your users' trust in you.
The good news? You can get to a solid baseline quickly, using the same AI tools that helped you build the thing.
Prompt to try:
"Review my app as a security specialist and ensure I have a strong security posture. Make sure I achieve an A rating for all security headers."
This alone will catch a surprising number of issues: missing Content-Security-Policy, no X-Frame-Options, absent Strict-Transport-Security. These are headers your server sends with every response — getting them right takes an hour and protects every user who visits.
3. Follow Real Security Standards
Security headers are the surface. Beneath them is a whole ocean.
You should be validating your app against OWASP standards — this is the industry baseline for web application security, and it's free. It covers:
- SQL injection protection
- Cross-site scripting (XSS) vulnerabilities
- Authentication and session management flaws
- Input validation and output encoding
Prompt to try:
"Review my app against the OWASP Top 10 security risks and identify any vulnerabilities I should fix before launch."
Don't let the list intimidate you. An AI tool walking through it systematically will find the obvious gaps in minutes. The point isn't to become a security engineer overnight — it's to not ship the obvious mistakes.
4. Stop Leaking Sensitive Data
This one catches a lot of people out, particularly developers who are new to shipping server-side code.
Common mistakes I see constantly:
- Exposing environment variables in frontend bundles (Next.js will do this if you prefix server-only keys with
NEXT_PUBLIC_by accident) - Returning more data in API responses than the client actually needs — including fields that should stay server-side
- Logging secrets unintentionally in production tracing tools
Prompt to try:
"Ensure my application is not leaking credentials, user PII, or internal implementation details in API routes, frontend requests, or error messages."
5. Never Expose API Keys
If your API key is visible in the browser's network tab… it's already compromised.
This is one of the most common mistakes in vibe-coded apps, because the AI tools generating your code often scaffold working examples with keys in places that work but shouldn't be there in production.
The rules are simple:
- Keep secret keys server-side, always
- Use proxy endpoints — let your server call the third-party API, not the browser
- Restrict key permissions at the source where possible (most providers let you scope keys)
Prompt to try:
"Check that no API keys or secrets are exposed in frontend code, environment variable bundles, or network requests."
And this is just the start
Security is one side of the coin. Performance is the next one — and most vibe-coded apps fall apart there the moment real users arrive with slower connections, older devices, and less patience than you have when you're testing localhost.
That's before you get to accessibility (WCAG compliance isn't optional if you're operating in regulated markets), SEO (your app won't get discovered if it's not indexable), and the UX issues that quietly kill conversion.
What I built to solve this
I've been working on PageLens AI — and I've been dogfooding it hard on exactly these kinds of apps.
It reviews your site across security, performance, accessibility, SEO, and UX in a single scan. Not a Lighthouse dump with a score — actual findings, prioritised by impact, with clear and actionable fixes.
If you're building something and you want to know what's broken before your users tell you, run a free audit.
If you take one thing from this
Don't overthink it. Just run the prompts above through your AI tool before you push to production.
You'll immediately improve your app — and avoid some very real problems that can come back and bite you after launch, when changing them is a lot more expensive.
— Richard