The checklist for launching your web application

A launch that feels uneventful is almost always the result of a checklist worked through calmly in the weeks before. What causes panic on go-live day is rarely difficult technology, but simple items nobody owned: the certificate that expired, the backup that was never tested, the form that sent emails nobody read. Here’s the checklist, sorted into four areas, written for you as the client commissioning the service rather than the one building it.

Technical: what has to be in place

The foundation is uptime reliability. Without it, nothing else matters.

• Domain and DNS point correctly, and you own the domain yourself – not the agency.
• TLS certificate is installed and renews automatically, so the site never suddenly shows a security warning.
• Backups are taken automatically and a restore has been tested. A backup you’ve never restored is a guess, not a safeguard.
• Monitoring alerts you on downtime and catches software errors, so you know about problems before your users do.
• Performance is reasonable under load – ideally load-tested if you expect many concurrent users at launch.
• Email from the service (receipts, password resets) arrives and doesn’t land in spam.

Why these specifically? Because the three most common ways a new service fails on launch day are an expired certificate, a backup that couldn’t be restored, and email that silently landed in the trash. All three are invisible until they happen, and all three can be checked off in advance.

Content and SEO

A technically perfect service with broken links and typos in the copy still feels unfinished.

• Proofread content with no leftover placeholder text from development.
• Correct page titles and meta descriptions, plus a sitemap search engines can find.
• Properly sized images with alt text, for both performance and accessibility.
• A 404 page that helps visitors find their way, and correct redirects if you’re replacing an older site.
• Tracking (analytics) is in place but configured to respect consent.

Legal and compliance

This area is the easiest to forget, and at the same time, the one that can become the most expensive afterward.

• Terms of use and a privacy policy exist, are up to date, and are easy to find.
• Personal data is handled in line with GDPR: a lawful basis, a clear purpose, and data processing agreements with the vendors handling data on your behalf.
• Cookie handling where declining non-essential cookies is just as easy as accepting them.
• Accessibility has been considered – for many organizations, it’s now a requirement, not a bonus.

Launch-day contingency plan

This is the point that separates a controlled launch from a chaotic one. A short plan is enough, but it needs to be in writing and walked through with everyone involved beforehand.

Designate a launch owner who makes decisions. Write down who does what, who’s reachable during the launch window, and how you reach each other fast – a shared channel beats scattered emails. Decide in advance the rollback threshold: what has to go wrong for you to pause, and how do you revert to the old version if you do? Without a predetermined threshold, the team easily gets stuck debating in the middle of a live situation, where every minute counts. Launch early in the week and early in the day, never right before a weekend, so the team is on hand if something needs fixing.

Have someone who didn’t build the service do a final click-through just before go-live. The developer who wrote the code easily overlooks the obvious, while a fresh pair of eyes catches the broken link or the confusing error message in seconds. Also have a short plan for how you’ll communicate with users if something goes wrong – a brief message acknowledging the issue builds more trust than silence.

A small, concrete scenario: you go live at nine on a Tuesday. Monitoring alerts after twenty minutes that the contact form isn’t sending. Because a launch owner has been designated, the developer is reachable, and the roles are clear, the bug is fixed before lunch – instead of being discovered by an unhappy customer the next day. That’s the whole point of the plan.

How to use the list

Go through the items as a team, not as one person’s responsibility, and note who owns each line. If you’re unsure whether the foundation holds up for a bigger launch, our services help with everything from requirements to deployment. Want to talk through your specific launch? Just get in touch.