T Themerella
Fix Guide

How to Fix Large JavaScript Payloads

The page appears to load many script resources.

Paste a full URL or enter a domain such as example.com. Results include technology evidence, quality checks, and a developer fix list.

Recommended fix

Remove unused third-party scripts, split code, defer non-critical JavaScript, and hydrate less UI.

This guide is designed to pair with a scanner report. Run a URL scan first, then follow the implementation steps.

Developer task

Audit bundles and third-party tags, then defer or remove non-essential scripts.

Implementation steps

How to apply this fix

  1. List all first-party and third-party scripts the page loads.
  2. Remove or consolidate tags that are unused, duplicated, or low-value.
  3. Add defer or async to non-critical scripts and code-split large bundles.
  4. Reduce client-side hydration where server-rendered HTML is enough.
  5. Re-scan and check that script count and payload findings improve.
Verify

Re-run the URL scan after deploying the change to confirm the issue clears and the Themerella Score updates.

Related guides

Continue the same website quality workflow.

Core Web Vitals CheckerHow to Fix a Large HTML DocumentHow to Fix a Slow Initial HTML Response