The Ultimate Pre-Launch Website Checklist for 2026: SEO, Security, and Performance

// todo

Version Control, Environment Setup and CI/CD

Git repository

Always use version control (commonly Git) to track changes, maintain history, backup your code, and eventually collaborate with others.

• Initialize Git repository
• Create a repository on a platform like GitHub or GitLab, Bitbucket or Codeberg
• Push your code to the remote repository
  🚨 Important

  Don't forget to add a .gitignore file to exclude sensitive files, local development files, build artifacts, and dependencies from being committed to the repository.

Automated backups

If your website relies on a database or has user-generated content, don't forget to set up automated backups to prevent data loss in case of server failure, hacking, or accidental deletion. (trust me in lot of cases I was really happy to have backups)
For your code, using a remote Git repository is often sufficient for backup purposes, but I recommend also setting up a backups for your code somewhere else.

• Set up automated backups for databases
  If you are using a managed database service (like AWS RDS, Google Cloud SQL, or Azure Database), they often have built-in backup options that you can configure.
  If you're managing your own database, consider using tools like mysqldump for MySQL or pg_dump for PostgreSQL to create regular backups (for example, using cron jobs on Linux).
  💡 Tip

  You can use Crontab Guru to easily create cron job schedules.

CI/CD (Continuous Integration/Continuous Deployment)

Setting up a CI/CD pipeline can automate the process of testing, building, and deploying your website, ensuring that new changes are integrated smoothly and deployed without downtime and makes it much easier to maintain and update your website in the long run.

• Set up a CI/CD pipeline

name: Build and Deploy

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Set up Node.js
        uses: actions/setup-node@v2
        with:
          node-version: '16'

      - name: Install dependencies
        run: npm install

      - name: Run tests
        run: npm test

      - name: Build project
        run: npm run build

      - name: Create build artifact
        uses: actions/upload-artifact@v2
        with:
          name: build

Content and SEO

Basic stuff

• Check spelling and grammar on all pages
• Verify all links are working and are valid (not returning 404 or 500 errors)

Main meta tags

• Set charset (preferably UTF-8)
• Set viewport for responsive design
• Set lang`` attribute on the ` tag
• Set title tag for each page (preferably unique and descriptive, these will be shown in search engine results and browser tabs, so it's important to make them relevant and appealing to users)
• Set description meta tag for each page (preferably unique and descriptive, these will be shown in search engine results and can influence click-through rates, so it's important to make them relevant and appealing to users)
• Set keywords meta tag (optional, but can be helpful for some search engines)
• Set author meta tag (optional, but can be helpful for attribution and SEO)
• Set canonical link tag to avoid duplicate content issues (if two pages points to the same content, search engines may penalize you for duplicate content, so it's important to specify the canonical URL for each page)
• Set robots meta tag to control how search engines crawl and index your pages (you can use it to prevent indexing of certain pages, for example admin panel or staging environment)
• :og tags (Open Graph) for social media sharing:
  • Set og:title for each page (preferably unique and descriptive)
  • Set og:description for each page (preferably unique and descriptive)
  • Set og:image to specify the image that should be displayed when the page is shared on social media
  • Set og:url to specify the canonical URL of the page
  • Set og:type to specify the type of content (for example, website for regular web pages, article for blog posts, etc.)
    You can see often when you share a link on social media or in messaging apps, it shows a preview with title, description and image - that's what Open Graph tags are for.

• Set theme-color meta tag to specify the color of the browser's address bar on mobile devices (optional, but can enhance the user experience on mobile)

Example:

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta name="description" content="A comprehensive, actionable checklist covering technical SEO, Core Web Vitals, security hardening, accessibility, and zero-downtime deployment strategies for modern web frameworks.">
  <meta name="keywords" content="SEO, web development, performance, security, devops, checklist">
  <meta name="author" content="Your Name">
  <link rel="canonical" href="https://www.example.com/your-page">
  <meta name="robots" content="index, follow">
  <meta property="og:title" content="The Ultimate Pre-Launch Website Checklist for 2026: SEO, Security, and Performance">
  <meta property="og:description" content="A comprehensive, actionable checklist covering technical SEO, Core Web Vitals, security hardening, accessibility, and zero-downtime deployment strategies for modern web frameworks.">
  <meta property="og:image" content="https://www.example.com/path-to-image.jpg">
  <meta property="og:url" content="https://www.example.com/your-page">
  <meta property="og:type" content="website">
  <meta name="theme-color" content="#ffffff">
</head>

Favicon

• Create a favicon for your website
  A favicon should be .ico image which should be square and at least 32x32 pixels in size.
  Favicon will be displayed in browser tabs, bookmarks, and other places where your website is referenced, so it's important to create a recognizable and visually appealing favicon that represents your brand or website.
• Add the favicon to your website by including a link tag in the <head> section of your HTML:

<link rel="icon" href="/path/to/favicon.ico" type="image/x-icon">

• Add additional link tags for different sizes and formats of the favicon to ensure it looks good on all devices and platforms:

<link rel="icon" href="/path/to/favicon-32x32.png" sizes="32x32" type="image/png">
<link rel="icon" href="/path/to/favicon-16x16.png" sizes="16x16" type="image/png">
<link rel="apple-touch-icon" href="/path/to/apple-touch-icon.png" sizes="180x180">

• Test the favicon on different browsers and devices to ensure it displays correctly and is recognizable

Sitemap and robots.txt

• Create a sitemap.xml file to help search engines discover and index your pages.
  The sitemap should include all important pages of your website and should be updated whenever you add or remove pages. Also you can set priority and change frequency for each page in the sitemap to give search engines more information about how to crawl your site.
  You can use online sitemap generators like XML-Sitemaps or Screaming Frog to create a sitemap for your website.

You should also submit your sitemap to search engines like Google Search Console and [BiBing Webmaster Tools ensure that they are aware of your sitemap and can use it to crawl and index your pages more effectively. More about these tools will come in a later section.

• Create a robots.txt file to control how search engines crawl and index your pages. The robots.txt file should be placed in the root directory of your website and should include rules for search engine bots, such as which pages to allow or disallow from crawling, and where to find the sitemap. You can use online robots.txt generators like Robots.txt Generator to create a robots.txt file for your website.

Example of a simple robots.txt file:

User-agent: *

Disallow: /admin/
Disallow: /staging/
Allow: /

Sitemap: https://www.example.com/sitemap.xml

TODO

Structured data (Schema.org)

For better SEO and to help search engines understand the content of your pages, you can add structured data using Schema.org vocabulary. This can enhance your search engine listings with rich snippets, which can improve click-through rates.
You can use the Google Structured Data Markup Helper or JSON-LD Playground to create and validate your structured data.

Example of structured data for a blog post:

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "BlogPosting",
  "headline": "The Ultimate Pre-Launch Website Checklist for 2026: SEO, Security, and Performance",
  "description": "A comprehensive, actionable checklist covering technical SEO, Core Web Vitals, security hardening, accessibility, and zero-downtime deployment strategies for modern web frameworks.",
  "author": {
    "@type": "Person",
    "name": "Your Name"
  },
  "datePublished": "2026-02-26",
  "image": "https://www.example.com/path-to-image.jpg",
  "url": "https://www.example.com/your-page"
}
</script>

Design, Accessibility and UI/UX

I bet you already have a design for your website, but it's important to make sure that it is not only visually appealing but also accessible and user-friendly. This can help improve the user experience, increase engagement, and ultimately lead to better SEO performance.

Firstly you should check the performance and accessibility with lighthouse in an incognito window or ideally use Page Speed Insights to get a detailed report on your website's performance and accessibility, along with specific recommendations for improvement. I'll help you with some of the most common issues and best practices to look out. Don't trust it that much but can help you at least a bit to find some of the most common issues.

• Ensure your website is responsive and works well on different screen sizes and devices. You can use Browseling or BrowserStack or LambdaTest to test your website on different browsers and devices, but unfortunately, these tools are not free, but you can use their free trials to test your website.
• Try a different viewports in Devtools to see how your website looks on different screen sizes and devices, and also use the device mode to simulate different devices and test your website's responsiveness and performance on them.
• Ideally find some old phones and tables, install different browsers like Firefox as it's using different engine than Chrome and Edge and ask your friend with Apple devices and Linux and test your website on them, because they are often the ones that have the most issues with new websites, especially if you are using some modern web technologies and features.
• Try also all features, interactions and all pages on different devices and browsers to make sure everything works as expected and there are no bugs or issues that could affect the user experience.

Image optimization

• Optimize all your images.
  It's important to optimize your images as lot of users have slow internet connections and also the less download, the faster your website will load and searching engine loves fast websites, also 53% of visitors leave a site when it takes long then 3 seconds to load and you might know it as when you're looking for something and it takes longer to load, you just go to another one.
  Ideally convert your images to formats like Webp or AVIF which are more efficient than traditional formats like JPEG and PNG, and also use responsive images with srcset to serve different sizes of images based on the user's device and screen size. Also some images can have a big resolution but are displayed in small size on the website, so you can resize them or lower the quality to reduce the file size without significantly affecting the visual quality.
  Images should be:
  • < 100KB for small images (like icons, logos, etc.)
  • < 500KB for medium images (like product images, etc.)
  • < 1MB for large images (like hero images, etc.)
• But I know sometimes it just it's not possible to make it so small, so use loading="lazy" attribute to lazy load images that are not immediately visible on the page, which can help improve the initial loading time of your website and also use a CDN (Content Delivery Network) to serve your images, which can help reduce latency and improve loading times for users around the world.
• Use descriptive and relevant file names for your images, and include alt attributes with descriptive text to improve accessibility and SEO. The alt text should describe the content of the image and its purpose on the page, which can help users with visual impairments understand the content of your website and also help search engines understand the context of your images. *For example, if you have an image of a red apple on your website, a good file name would be red-apple.jpg and a good alt text would be A red apple on a white background.
• Prerender important images (like hero images, above-the-fold images, etc.) to ensure they load quickly and are visible to users as soon as possible. You can use the preload link tag in your HTML to specify which images should be preloaded by the browser. For example:

<link rel="preload" href="/path/to/hero-image.jpg" as="image">

Fonts

• Use web-safe fonts or include fallback fonts in your CSS to ensure that your website looks consistent across different devices and browsers. Web-safe fonts are fonts that are widely available on most operating systems and devices, such as Arial, Helvetica, Times New Roman, etc. If you want to use custom fonts, make sure to include fallback fonts in your CSS so that if the custom font fails to load for any reason, the browser can fall back to a similar font that is available on the user's device. For example:

body {
  font-family: 'Custom Font', Arial, Helvetica, sans-serif;
}

• Use a font loading strategy to ensure that your fonts load quickly and don't block the rendering of your website. You can use the font-display property in your CSS to control how fonts are loaded and displayed. For example, you can use font-display: swap; to allow the browser to display a fallback font while the custom font is loading, which can help improve the perceived performance of your website.
• Use a CDN (Content Delivery Network) to serve your fonts, which can help reduce latency and improve loading times for users around the world.
• Use a font subsetting tool to create a custom font file that only includes the characters you need for your website, which can help reduce the file size and improve loading times.
• If you're using a web font service like Google Fonts or Adobe Fonts, make sure to select only the font weights and styles that you actually need for your website, as including unnecessary font weights and styles can increase the file size and loading times.
• Make sure you don't load fonts that you need only on some specific pages everywhere.

TODO

Icons and SVGs

• Use SVGs for icons and other simple graphics, as they are scalable, lightweight, and can be easily styled with CSS. SVGs can also be optimized to reduce file size without significantly affecting visual quality, and they can be inlined in your HTML or CSS to reduce the number of HTTP requests and improve loading times.
• If you need only a few icons from a larger icon set, consider using a tool like IcoMoon to create a custom icon font that includes only the icons you need, which can help reduce the file size and improve loading times. TODO

Accessibility and semantic HTML

• Use semantic HTML elements to improve accessibility and SEO (for example, use <header>, <nav>, <main>, <article>, <section>, <footer> instead of just <div>s.
• Ensure that your website is accessible to users with disabilities by following the Web Content Accessibility Guidelines (WCAG) and using tools like axe or WAVE to test for accessibility issues. TODO
• Use a consistent and visually appealing design that aligns with your brand and target audience.
• Ensure that your website is easy to navigate and that users can find the information they. Ask your friends and family to test your website and give you feedback on the design, usability, and overall user experience. This can help you identify any issues or areas for improvement that you may have missed.

404 and 500 error pages

• Create custom 404 and 500 error pages to provide a better user experience when users encounter errors on your website. A custom 404 page can help guide users back to the main content of your website and can also include helpful links or a search bar to help users find what they're looking for. A custom 500 page can provide a more user-friendly message when there is a server error and can also include contact information or a way for users to report the issue. Make sure to test your error pages to ensure they display correctly and provide a good user experience.
• You TODO

Security, security and a bit legal stuff

HTTPS and SSL/TLS

• Set up HTTPS for your website to ensure that all data transmitted between the user's browser and your server is encrypted and secure. You can obtain an SSL/TLS certificate from a trusted certificate authority (CA) like Let's Encrypt for free, and many hosting providers also offer SSL/TLS certificates as part of their hosting packages. Once you have your SSL/TLS certificate, you can configure your web server (like Nginx, Apache, Traefik), or Caddy to use HTTPS and redirect all HTTP traffic to HTTPS. This can help improve the security of your website and also boost your SEO, as search engines prefer secure websites. Caddy for example has automatic HTTPS built-in, so you don't have to worry about obtaining and renewing SSL/TLS certificates, it will handle everything for you.
• Test your HTTPS setup using tools like SSL Labs to ensure that your SSL/TLS configuration is secure and properly set up. This can help you identify any potential vulnerabilities or issues with your HTTPS implementation and ensure that your website is secure for your users.
• Enforce HTTPS by redirecting all HTTP traffic to HTTPS and using the Strict-Transport-Security HTTP header to tell browsers to always use HTTPS when connecting to your website. This can help prevent TODO

Content Security Policy (CSP)

• Implement a Content Security Policy (CSP) to help protect your website from cross-site scripting (XSS) attacks and other code injection vulnerabilities. A CSP allows you to specify which sources of content are allowed to be loaded on your website, which can help prevent malicious scripts from being executed in the context of your website. You can use the Content-Security-Policy HTTP header to implement a CSP for your website, and you can use tools like CSP Evaluator to test and validate your CSP configuration. It's important to carefully configure your CSP to allow necessary content while blocking potentially harmful content, and to regularly review and update your CSP as needed to ensure that it remains effective in protecting your website from security threats.
  TODO

Input validation and sanitization

• Implement input validation and sanitization and test it properly.
  If your website accepts user input (for example, through forms, search bars, comments, etc.), it's important to implement input validation and sanitization to prevent security vulnerabilities like cross-site scripting (XSS) and SQL injection attacks. Input validation involves checking that the user input meets certain criteria (for example, that an email address is in a valid format), while input sanitization involves removing or escaping any potentially harmful characters from the user input. You can use libraries like [validator.js]( TODO

Authentication and authorization

• Implement authentication and authorization if your website has user accounts or restricted areas. This can help protect sensitive information and ensure that only authorized users can access certain parts of your website. You can use authentication libraries like Passport.js for Node.js, TODO AND TEST

Rate limiting, Captcha and bot protection

• Implement rate limiting, CAPTCHA, and other bot protection measures to prevent abuse and protect your website from spam, brute-force attacks, and other malicious activities. Rate limiting can help prevent excessive requests from a single IP address, while CAPTCHA can help verify that a user is human and not a bot. You can use libraries like [express-rate-limit](https://www.npmjs.com/package
• You can use Cloudflare or reCAPTCHA to protect your website from bots and malicious traffic, which can help improve the security of your website and also reduce the load on your server.
• You can use ReCAPTCHA or hCaptcha to protect your forms from spam and abuse, which can help improve the security of your website and also ensure that you are receiving legitimate submissions from users.

Data protection and privacy (legal stuff)

There are also some legal requirements and best practices that you should consider when launching your website, especially if you are collecting any personal data from your users. It's important to comply with data protection laws like the General Data Protection Regulation (GDPR) in the European Union, the California Consumer Privacy Act (CCPA) in California, and other relevant laws in your jurisdiction. This may involve implementing a privacy policy, obtaining user consent for data collection, and providing users with the ability to access, modify, or delete their personal data. You should consult with a legal professional to ensure that your website complies with all applicable data protection laws and regulations. TODO

• Check out GDPR Compliance Checklist to ensure that your website complies with the General Data Protection Regulation (GDPR) if you are collecting personal data from users in the European Union.
• Check out CCPA Compliance Checklist to ensure that your website complies with the California Consumer Privacy Act (CCPA) if you are collecting personal data from users in California.
• Implement a privacy policy that clearly explains how you collect, use, and protect user data, and make it easily accessible to users on your website. You can use online privacy policy generators like Privacy Policy Generator or TermsFeed to create a privacy policy for your website.
  TODO

Deployment and monitoring

TODO

Analytics, monitoring, SEO and other useful tools

Analytics

Monitoring and error tracking

SEO tools

Performance monitoring and optimization tools

Uptime monitoring tools

Other useful tools and resources

Thanks for reading this, hope it was helpful and you found some useful tips and tools that can help you with launching your website. I wish you good luck with your website!