A GA4 audit is a systematic check of your Google Analytics 4 property for completeness, data quality and privacy compliance. It covers configuration (streams, events, key events), data quality at event level, Consent Mode v2 and the on-page implementation.

What does a GA4 audit cost?

The GA4 Auditor is free to use at its core - log in with Google, the audit runs in your browser. A manual agency audit costs significantly more depending on scope; the tool delivers the factual basis in minutes and makes recurring checks reproducible.

What exactly does the GA4 Auditor check?

Four methods: a live check via the Admin and Data API (configuration), traffic-light checks from the BigQuery export (data quality at event level), an SST analysis (server-side tagging potential) and an on-page scan before and after consent.

Is the GA4 Auditor free?

Yes, getting started is free. You sign in with Google (read-only), pick a property and start the audit - no installation, straight in the browser.

How long does a GA4 audit take?

The live check returns results in seconds to a few minutes. The in-depth BigQuery analysis depends on the data volume, but usually also runs in a few minutes.

Do I need the BigQuery export?

No, not necessarily. The live check and on-page scan work without it. With the BigQuery export enabled, the auditor lifts the analysis to event level - for duplicates, PII hints and funnel consistency.

Is there a free GA4 audit tool?

Yes. The GA4 Auditor runs a free GA4 audit straight from Google's official APIs - sign in with Google (read-only), pick a property, start. The live check and on-page scan are free; the deeper BigQuery analysis is optional.

GA4 audit tool vs. manual audit - which is better?

An automated GA4 audit tool is faster and repeatable and gives you a factual baseline in minutes; a manual audit adds human strategy but is slow and hard to reproduce. Most teams use the tool for recurring checks and an expert for interpretation.

GA4 Audit Tool & Checker - Free, Read-Only, from Google's APIs

The structure

Seven questions, around 40 analyses.

Each question bundles several analyses into one clear result. You do not read raw data - you get findings.

Data arrival

Is my data arriving?

Data quality

Is my data clean?

Attribution

How do my channels create value?

Sales

Is my revenue correct?

Identity

Do I recognise my users again?

User behaviour

What are my users doing?

Server-Side

Is my server tracking correctly?

All topics

Three steps to your findings

From sign-in to first findings in under three minutes.

1

Connect a property

Sign in with Google and pick your GA4 property. Read-only, no password.

2

The check runs

The auditor works through the seven questions and collects the findings.

3

Read the findings

Sorted by severity, with method and fix for every single one.

Free GA4 audit: what you get without paying

The GA4 Auditor is free at its core: sign in with Google (read-only), pick a property and start. The live check (Admin & Data API) and the on-page scan run for free - no install, no credit card. The deeper BigQuery analysis is optional and uses your own export.

Live check

Admin & Data API - free, straight from Google's official APIs.

On-page scan

Headless browser, before and after consent - free.

BigQuery analysis

Event-level depth - optional, uses your own export.

What is a GA4 audit?

A GA4 audit is a systematic check of your Google Analytics 4 property for completeness, data quality and privacy compliance. The GA4 Auditor checks configuration, event-level data quality, Consent Mode v2 and the on-page implementation - straight from the official Google APIs.

See the full GA4 audit checklist

Four audit methods in one tool

Pick the depth you need - from quick API checks to full BigQuery-grade analysis.

GA4 Live Check

Setup and data-quality checks via Admin and Data API. Streams, key events, enhanced measurement.

Traffic-Light Checks (BigQuery)

Event-level depth for data quality, duplicates, PII hints and funnel consistency from the raw export.

SST Analysis

Weighted score from cookie lifetime, attribution gap, funnel duration and cross-domain - shows whether server-side tracking pays off.

OnPage Checks

Headless-browser scan via Playwright, before and after consent. Detects 14 CMPs and 9 trackers.

Privacy as architecture, not as promise

OAuth instead of passwords. Read-only instead of admin. EU hosting instead of trust-me.

OAuth, no passwords

Sign in with Google. Read-only scopes, short-lived in-memory tokens. We never see your credentials.

HMAC-hashed property IDs

Property identifiers are hashed before storage. Linkable for the user, opaque for an attacker.

EU hosting, GDPR-friendly

Infrastructure runs on Google Cloud in europe-west3 (Frankfurt). No US transfer for app data.

What the GA4 Auditor delivers

Six focus areas - from API-driven live checks to GDPR-grade architecture.

What we audit

Tracking, data quality and Consent Mode v2 - end-to-end over the official Google APIs, optionally reconciled against the BigQuery export.

Features & test catalogue

Live check via GA4 API

Which events arrive today? Which property settings are suboptimal? In seconds, per stream, per day, per event type.

Live Check details

BigQuery deep analysis

Sessions, conversions, e-commerce, audience logic and page performance - straight from the raw export. See why BigQuery and live API can disagree.

Attribution: Live API vs. BigQuery

Consent Mode v2 audit

We check whether ad_user_data and ad_personalization flow correctly through your setup and whether Google's modelling is active.

Multi-language & SEO-ready

Server-side rendered with FastAPI, Jinja2 and markdown-it-py. Fully indexable for search engines and LLM discovery, in DE and EN.

Read the blog

Read-only & EU-hosted

Login with Google, OAuth read-only scopes, HMAC-hashed property IDs. Infrastructure runs in europe-west3 (Frankfurt).

Privacy policy

Audit topics in depth

Six topic clusters - from tracking quality to consent. Each hub links the matching guides and help articles.

Tracking quality

Event schema, (not set), unassigned traffic and custom dimensions.

Tracking quality

Consent & privacy

Verify Consent Mode v2 and privacy-compliant tracking.

Consent Mode v2

BigQuery & data modelling

Event-level data quality from the BigQuery export.

BigQuery audits

Attribution & acquisition

Attribute sources, gclid, self-referrals and cross-domain correctly.

Attribution audit

E-commerce tracking

Purchase events, deduplication, refunds and payment referrers.

E-commerce checks

Features & checklist

The full GA4 audit checklist - every check explained.

Audit checklist

Who is the GA4 Auditor for?

Agencies

Reproducible GA4 audits across many client properties - in minutes, with a clear traffic-light verdict to hand over.

In-house teams

Ongoing quality control of your own setup after every release, relaunch or CMP change.

E-commerce

Clean purchase events, deduplication and payment-referrer handling - so revenue in GA4 is trustworthy.

GA4 Auditor vs. a manual agency audit

An automated GA4 audit tool and a manual agency audit solve the same problem differently - here is who each is for.

Criterion	GA4 Auditor (automated)	Manual agency audit
Speed	Minutes (live)	Days
Repeatable	Yes, on demand	No, each time from scratch
Data access	Read-only, official Google APIs + BigQuery	Manual, depends on access
Cost	Free at its core	Expensive, depends on scope
Strategy interpretation	Factual baseline, no consulting	Human judgement
Recurring checks	Yes, regression-proof	Uneconomical

Best for

In-house teams and agencies that need a fast, repeatable factual baseline before, during and after a release - and anyone who wants a free first GA4 audit straight from Google's APIs.

Not the right fit if

You need a one-off strategic consulting deliverable with human interpretation, or you have no Google access to the property. The tool delivers the facts; the strategy is still yours.

Frequently asked questions

What is a GA4 audit?: A GA4 audit is a systematic check of your Google Analytics 4 property for completeness, data quality and privacy compliance. It covers configuration (streams, events, key events), data quality at event level, Consent Mode v2 and the on-page implementation.
What does a GA4 audit cost?: The GA4 Auditor is free to use at its core - log in with Google, the audit runs in your browser. A manual agency audit costs significantly more depending on scope; the tool delivers the factual basis in minutes and makes recurring checks reproducible.
What exactly does the GA4 Auditor check?: Four methods: a live check via the Admin and Data API (configuration), traffic-light checks from the BigQuery export (data quality at event level), an SST analysis (server-side tagging potential) and an on-page scan before and after consent.
Is the GA4 Auditor free?: Yes, getting started is free. You sign in with Google (read-only), pick a property and start the audit - no installation, straight in the browser.
How long does a GA4 audit take?: The live check returns results in seconds to a few minutes. The in-depth BigQuery analysis depends on the data volume, but usually also runs in a few minutes.
Do I need the BigQuery export?: No, not necessarily. The live check and on-page scan work without it. With the BigQuery export enabled, the auditor lifts the analysis to event level - for duplicates, PII hints and funnel consistency.
Is there a free GA4 audit tool?: Yes. The GA4 Auditor runs a free GA4 audit straight from Google's official APIs - sign in with Google (read-only), pick a property, start. The live check and on-page scan are free; the deeper BigQuery analysis is optional.
GA4 audit tool vs. manual audit - which is better?: An automated GA4 audit tool is faster and repeatable and gives you a factual baseline in minutes; a manual audit adds human strategy but is slow and hard to reproduce. Most teams use the tool for recurring checks and an expert for interpretation.

GA4 Audit: check your Google Analytics 4 property in minutes

Seven questions, around 40 analyses.

Data arrival

Data quality

Attribution

Sales

Identity

User behaviour

Server-Side

Three steps to your findings

Connect a property

The check runs

Read the findings

Free GA4 audit: what you get without paying

Live check

On-page scan

BigQuery analysis

What is a GA4 audit?

Four audit methods in one tool

GA4 Live Check

Traffic-Light Checks (BigQuery)

SST Analysis

OnPage Checks

Privacy as architecture, not as promise

OAuth, no passwords

HMAC-hashed property IDs

EU hosting, GDPR-friendly

What the GA4 Auditor delivers

What we audit

Live check via GA4 API

BigQuery deep analysis

Consent Mode v2 audit

Multi-language & SEO-ready

Read-only & EU-hosted

Audit topics in depth

Tracking quality

Consent & privacy

BigQuery & data modelling

Attribution & acquisition

E-commerce tracking

Features & checklist

Who is the GA4 Auditor for?

Agencies

In-house teams

E-commerce

GA4 Auditor vs. a manual agency audit

Best for

Not the right fit if

Connect your property and see the first findings.

Frequently asked questions