---
title: "Lightweight Analytics Script | Keep Sites Fast"
description: "A lightweight analytics script tracks traffic, events, and conversions while protecting page speed and Core Web Vitals."
url: "https://flowsery.com/en/features/lightweight-script"
---

# Keep Your Site Fast With a Lightweight Analytics Script

A lightweight analytics script tracks visits, events, and conversions without bloating your pages, helping you protect speed, Core Web Vitals, and SEO.

[Start Tracking for Free](https://flowsery.com/en/signup)

Under 10 KB

Zero speed impact

Better SEO scores

Script Size Comparison

gzipped

Flowsery< 10 KB

Datafast\~14 KB

Matomo\~68 KB

GA4\~90 KB

4x smaller than Google Analytics

## Lightweight Analytics Script, Full Data

A lighter analytics script means faster pages, happier visitors, and analytics that do not drag down your site.

Size

Script Size

Flowsery

< 10 KB

Datafast

\~14 KB

Matomo

\~68 KB

GA4

\~90 KB

### Under 10 KB

The entire tracking script weighs under 10 KB. Smaller than most images on the web.

Speed

Performance ScoreLighthouse

100

Performance

### Zero Impact on Page Speed

No measurable effect on load time, Lighthouse scores, or Core Web Vitals.

SEO

Core Web Vitals

LCP

Largest Contentful Paint

1.2s

Good

FID

First Input Delay

8ms

Good

CLS

Cumulative Layout Shift

0.02

Good

### Better SEO

Page speed is a ranking factor. A lighter analytics script means better search rankings.

Green

CO2 per Page Load

Flowsery

0.1g

GA4

7.5g

75x less CO2

### Lower Carbon Footprint

Less data transferred means fewer emissions. Better for the planet.

Simple

Network Requests

Flowsery

flowsery.js

18ms

GA4

gtag.js

85ms

analytics.js

64ms

collect?v=2

120ms

consent.js

45ms

### No External Dependencies

Single self-contained script. No tag managers, no third-party requests.

Universal

![](https://icons.duckduckgo.com/ip3/stripe.com.ico)![](https://icons.duckduckgo.com/ip3/paddle.com.ico)![](https://icons.duckduckgo.com/ip3/polar.sh.ico)![](https://icons.duckduckgo.com/ip3/dodopayments.com.ico)![](https://icons.duckduckgo.com/ip3/shopify.com.ico)![](https://icons.duckduckgo.com/ip3/lemonsqueezy.com.ico)

Revenue Providers

Connect

Custom Events

Connect

REST API

Connect

OpenClaw

Connect

### Works Everywhere

Compatible with any framework, CMS, or static site. One line of code.

## Add Analytics in 30 Seconds

One script tag. No build tools. No configuration. Just paste and go.

Step 1

###### One Line of Code

Add a single script tag to your site's head. That's it. No build steps, no configuration files, no package installs.

Step 2

###### Invisible Performance

The script loads asynchronously and never blocks rendering. Your visitors won't notice it's there, but you'll see every visit.

Step 3

###### Full Analytics Power

Despite its size, you get real-time data, custom events, funnels, and revenue tracking. No compromises.

## Analytics That Won't Slow You Down

Join thousands of websites running the lightest analytics script on the web. 14-day free trial, no credit card required.

[Start Tracking for Free](https://flowsery.com/en/signup)[View Pricing](https://flowsery.com/en/pricing)