SEO Checklist for Developers

SEO Checklist for Developers
Server-side Rendering (SSR)
Implement server-side rendering to ensure search engines can crawl and index content.
Use tools like Next.js or Gatsby.js that provide SSR capabilities out of the box.
Test the mobile-friendliness using tools like Google's Mobile-Friendly Test.
Code Splitting and Bundle Size
Implement code splitting techniques to optimize bundle size.
Reduce unnecessary dependencies and remove unused code.
Use tools like webpack and Babel to optimize your React.js code.
Image Optimization
Optimize images by compressing them to improve page load speed.
Alt tags for images (SVG).
Page Speed
Minify CSS and JavaScript files, and optimize images.
Use caching techniques and content delivery networks (CDNs)
Choose a fast hosting provider
Enable lazy loading
Remove render-blocking Javascript
Optimize database
Uncompressed JavaScript and CSS files Issue
Uncached JavaScript and CSS files Issue
JavaScript and CSS total size that is too large Issue
Too many JavaScript and CSS files Issue
Header Tags (H1, H2, H3, etc.)
H1 tag on top of the Page. It is used only one time on a particular page.
Utilize H2, H3, and subsequent tags to organize subheadings and sections.
URL Structure
Create clean and readable URLs that reflect the content hierarchy.
Use hyphens to separate words in the URL.
It must be less than 3 clicks
URLs are longer than 200 characters
Dont use Underscores in the URL
Meta Tags
Meta Title, Meta Description, OG Title, Og Description and Alt Image Tag
Sitemap and robot.txt
Auto Sitemap creation
Robot.txt file
HSTS - Force to (vice versa)
Low text-HTML ratio
Permanent Redirect 301
Temporary Redirect 302
303, 307, and 308
Redirect chains and loops Issues
Correct File Format
Image - Webp, SVG
Video- MP4
Minify code
Javascript Reduce code or remove unused code
Broken JavaScript and CSS files
Make sure your img tags have alt attributes.
Analytics and Tracking
Setup Google Analytics, Google tag manager, GSC, Fb pixel code
Google search console
Canonical URL
Create Canonical URL tag
Staging Site Issues
Mark as no index, so search engine dont crawl
Add good security protocols or necessary plugins installed
Example: <title>, <body>, <h1>, <h2>, <h3>, <p> (paragraph), <a> (link), <img> (image)
HTTP Status Code and SSL Certificate
1xx information (100-199)
2xx successful (200-299)
3xx redirection (300-399)
4xx client error (400-499)
5xx server error (500-599)
Wrong Country code added values
Incorrect hreflang links
Important Pages
404 Error Page
Thank You Page
DNS resolution issue
When our crawler can't resolve the hostname when trying to access your webpage

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