Chrome extension for web developers & performance

See which third-party scripts drag down your page

Open any page and ScriptDrag names every third-party script on it — Google Tag Manager, that chat widget, the ad network — with its weight, an estimated main-thread cost, and a kill-list of what to defer or drop. One click. No DevTools, no Lighthouse run, no setup.

Add to Chrome — Free See pricing Free every day · Pro is a one-time license
ScriptDrag panel showing named third-party vendors, their size and estimated cost, and a redundancy finding

Third-party JavaScript is where the weight hides

ScriptDrag turns anonymous domains into named vendors and a ranked to-do list.

Who's actually on your page

Names every third-party script — Google Tag Manager, Intercom, Doubleclick — with its category, instead of anonymous domains.

A kill-list ranked by cost

Ranks third parties by estimated main-thread cost so you fix the worst offenders from the top down.

Redundant-vendor detector

Flags when you ship 3 analytics tools or 2 chat widgets — the bloat you can cut today. (Pro)

Honest weight

Real bytes over the wire plus an estimated cost. Scripts that hide their size are labeled “size hidden”, never shown as 0.

One click, no DevTools

Reads the page's own Resource Timing. No profiling trace, no Lighthouse audit, nothing to configure.

📄

Branded report

Export a client-ready Markdown or printable PDF report with your agency's name on it. (Pro)

Three steps

1

Open the page

Load any page you want to audit and let it finish.

2

Click the icon

ScriptDrag reads the current tab's Resource Timing — nowhere else.

3

Work the kill-list

Defer, lazy-load, or drop the heaviest third parties from the top. Press Esc to stop.

A report you can hand to a client

One click turns a scan into a branded, client-ready deliverable.

ScriptDrag branded third-party script report with summary, redundancy findings and a vendor table

Simple pricing

One-time license, no subscription.

Free
$0
  • 5 scans per day
  • Named third parties + categories
  • Kill-list top offenders
  • Performance budget badge
Add to Chrome
Best value
Pro
$89 one-time
  • Unlimited scans
  • Full kill-list (every domain)
  • Redundant-vendor detector
  • CSV / JSON export
  • Branded shareable report
  • Lifetime updates · 3 devices
Get Pro

Running an agency? White-label your reports with your own name on the Pro license — talk to us.

Add ScriptDrag to Chrome

Free to start — install, open a page, and click the icon.

Add to Chrome — Free

Coming soon to the Chrome Web Store.