How to Improve Your Lighthouse Score from 50 to 90+
A tactical guide to dramatically improving your Google Lighthouse performance score. Covers the exact audit items that move the needle most, with prioritized fix order.
How Lighthouse Calculates Your Score
Lighthouse weights 6 metrics to calculate performance score:
TBT and LCP account for 55% of your score. Fix those first.
Step 1: Run a Baseline Audit
Before making any changes, run an audit on VitalFix to establish your baseline:
1. Go to vitalfix.dev/dashboard
2. Enter your URL and click "Run Audit"
3. Note your Performance, LCP, TBT, and CLS values
4. Check the "Opportunities" tab for prioritized fixes
This gives you a clear before/after comparison.
Step 2: Fix the Highest-Impact Issues
Attack issues in this order (highest impact first):
Step 3: Re-Test and Iterate
After each change:
1. Deploy to a staging environment
2. Run another audit on VitalFix
3. Compare against your baseline using the History tab
4. Repeat until you hit 90+
Real improvement is iterative. Don't try to fix everything at once — tackle the biggest wins first.
Test these fixes on your site
Run a free audit to see your current General score and get prioritized fix recommendations.
Run Free Audit