What should I check before launching a Lovable website?

Run through security, forms, auth, payments, mobile display, browser compatibility, speed, SEO basics and broken links before you hit Publish.

How do I test my Lovable app?

Work through core user flows manually in Preview and on a published link, on desktop and mobile, as a logged-out user and as a normal account — not just as the builder.

How do I test mobile devices?

Open the published site on a real phone (or use your browser's device toolbar as a fallback) and check layout, tap targets, forms and navigation at common breakpoints.

Submit every form with valid, invalid and empty data, confirm error messages appear, and check that submitted data actually lands where it should (database, inbox or integration).

How do I test user registration?

Sign up with a real and a duplicate email, confirm verification emails arrive, check password rules, and confirm a new account only gets the access it should.

How do I test password reset?

Request a reset with a real account, confirm the email arrives with a working link, complete the reset, and confirm the old password stops working and the reset link can't be reused.

How do I test payments?

Run a real Stripe test-mode transaction end to end — checkout, webhook, database update and confirmation email — before switching to live keys.

How do I test admin permissions?

Log in as a non-admin account and try to reach every admin action directly (URLs, buttons, API calls) to confirm the server — not just the UI — blocks it.

Try reading and writing data as a different logged-in user and as a logged-out visitor to confirm row-level security actually blocks what it should, rather than assuming the policy is correct.

Check that every page has a unique title and meta description, images have alt text, the site generates a sitemap, and preview the page as a search engine or social share would see it.

How do I test different browsers?

Open the published site in at least Chrome, Safari and Firefox on both desktop and mobile, and check layout, forms and any browser-specific features work in each.

How do I check for broken links?

Click through every nav item, footer link and CTA yourself, or ask Lovable to list every link on the site so you can verify each one resolves before launch.

How do I check for console errors?

Open your browser's developer console on every key page of the published site and look for red error messages — then ask Lovable to fix each one by name.

How do I back up my project before launch?

Bookmark the current state in Version history, and push to a connected GitHub/GitLab repo via Git sync so you have a full backup outside Lovable too.

How do I test website speed?

Last checked 31 Aug 2026

Short answer

Run the published (not local) URL through a tool like Google PageSpeed Insights or WebPageTest, and check real load times on mobile data, not just your fast office wifi.

How to measure it properly

Test the published URL, not the local Lovable preview — local preview speed doesn't reflect real hosting, CDN and network conditions.
Run it through Google PageSpeed Insights or WebPageTest for objective metrics (Largest Contentful Paint, Time to Interactive, etc.) rather than a subjective "feels fast".
Check on a throttled/mobile connection, not just fast wifi — most speed tools let you simulate this.
Look at what's actually slow — usually large unoptimised images, unnecessary third-party scripts, or too much data fetched upfront.

Common fixes to ask Lovable for

This page is loading slowly — check for oversized images that need compressing, and see if we're fetching more data than the page actually needs on first load.

Other options:

Lazy-load images below the fold.
Defer or remove third-party scripts you don't actually need at launch.
Paginate or limit large data queries instead of fetching everything at once.

What usually goes wrong

Uploading large, uncompressed images straight from a phone or camera.
Loading heavy analytics/chat-widget scripts that block rendering before the page is even usable.
Testing only on a fast, wired connection and never simulating a realistic mobile network.
Fetching an entire table's worth of data on page load "just in case", when the page only shows the first 20 rows.

See also /questions/how-do-i-test-seo, since speed affects search ranking too.

Sources

PageSpeed Insights

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