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

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.

How it works

From login to first findings in under three minutes.

1

Sign in with Google

OAuth, read-only scopes, no password. Your GA4 credentials never touch our database.

2

Select a property

Pick a GA4 property and optionally connect the BigQuery export for deeper analysis.

3

Run the audit

Live API, traffic-light checks, SST score and OnPage scan - findings explained in plain language.

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.