This review covers 6 categories of free audit tools: Google's own tools, third-party graders, Chrome extensions, script-based auditors, what all of them miss, and when a free tool is enough vs. when you need more.
Google's Built-In Audit Tools
Before looking at third-party tools, start with what Google already gives you for free inside the Ads interface. There's actually quite a bit of useful audit data built in, and most people don't use it.
Recommendations Tab
Google's Recommendations tab gives your account an "Optimization Score" from 0-100. It's not a bad starting point, but take the individual recommendations with a healthy dose of skepticism. Google's suggestions are designed to increase your spending on Google Ads. That's not always aligned with your goals.
The useful recommendations: adding missing sitelink extensions, fixing disapproved ads, removing redundant keywords. The ones to be careful with: "Raise your budget," "Switch to broad match," "Add more keywords." These might help, but they also might just increase your cost.
Performance Planner
The Performance Planner forecasts what might happen if you change budgets or targets. It uses your account's historical data and broader auction trends. The forecasts are directionally useful but not precise. Think of it as "probably roughly right" rather than a reliable prediction.
Insights Page
The Insights page shows search trends, audience shifts, and performance changes. It's helpful for understanding why things changed but it doesn't tell you what to fix. Still, checking it monthly takes 5 minutes and occasionally surfaces something useful.
Third-Party Grader Tools
These are the "connect your account, get a report" tools. You grant read access to your Google Ads account, and they generate a scored audit report. Most are free because they're lead generation tools for agencies or software companies.
What They Typically Check
- Wasted spend: How much you're spending on search terms that don't convert
- Quality Score distribution: What percentage of your keywords have low Quality Scores
- CTR benchmarks: How your click-through rates compare to industry averages
- Account structure: Basic checks like ad group size and keyword-to-ad ratios
- Extensions: Whether you have sitelinks, callouts, and other extensions active
The reports are usually well-designed and easy to read. They give you a score and flag the biggest issues. For a quick health check, they're actually not bad.
Where They Fall Short
Most graders compare you to averages. But averages are misleading. If you're in a niche B2B market, being benchmarked against all Google Ads advertisers doesn't tell you much. Your CTR "should" be different from an ecommerce store running Shopping ads.
They also tend to weight all findings equally. A missing sitelink extension and broken conversion tracking might both show up as "issues," but one is a minor improvement and the other is costing you real money every day.
Chrome Extensions for Quick Audits
There are several Chrome extensions that add audit features directly into the Google Ads interface. These are nice because they run while you're already inside the account, so there's no separate login or OAuth process.
What they're good at:
- Flagging issues as you browse campaigns (like low ad strength or missing extensions)
- Adding extra columns or data views that Google doesn't show by default
- Quick competitor analysis for specific keywords
The downside is they're usually limited to whatever page you're viewing. They don't run a full account scan unless you manually navigate to every section. So they're better as daily monitoring tools than as audit tools.
Google Ads Scripts for Automated Checks
If you're comfortable with a bit of technical setup, Google Ads scripts can run automated audits on a schedule. There are free scripts available that check for things like:
- Broken landing pages (404 errors)
- Keywords with zero impressions in 30+ days
- Ad groups with only one ad (no A/B testing)
- Campaigns spending over budget
- Search terms with high spend and zero conversions
The setup takes 15-30 minutes per script, and once running they're fully automated. They can email you when they find issues. This is probably the most underused free audit approach. The catch is you need to know what to look for, because you have to pick which scripts to install.
What Free Tools Almost Always Miss
Here's where it gets interesting. No matter which free tools you use, there are entire categories of problems they can't catch. This isn't because the tools are bad. It's because these checks require context that automated tools don't have.
Conversion Tracking Accuracy
Most free tools check if conversion tracking exists. They don't check if it's accurate. Having a conversion action that fires on every page load is technically "active tracking" but it's completely wrong. Verifying that your conversion data matches reality requires comparing Google Ads data against your CRM, analytics, and actual sales records.
Cross-Campaign Cannibalization
When your Search campaigns and Performance Max campaigns compete for the same queries, neither shows up as "broken" in any audit tool. But the overlap means you're bidding against yourself, driving up costs. Detecting this requires looking at how multiple campaigns interact, not just checking each one individually.
Attribution Model Fit
Is your attribution window the right length for your buying cycle? Is your attribution model giving credit to the right touchpoints? These are questions that depend on your business, your sales cycle, and your customer behavior. No automated tool can evaluate this without understanding your business model.
Audience Strategy
Whether your audience targeting makes sense depends on who your customers are and how they find you. A free tool can tell you that you have no audience lists. It can't tell you which audiences you should be building or whether your exclusions make sense for your business.
Competitive Context
Your CPC might be high, but is it high relative to your competitors? Are you in an auction where everyone's CPCs are rising? Or is your Quality Score dragging your costs up while competitors pay less for the same clicks? Free tools show your numbers. They rarely show how those numbers compare to your actual competitive set.
For a more detailed look at what professional audits cover that free tools miss, check out our piece on what happens in a professional Google Ads audit.
When Free Is Enough (and When It's Not)
Free tools are probably enough if:
- You're spending under $5K/month and managing the account yourself
- You haven't audited the account in 6+ months and want a quick check
- You're evaluating whether to hire an agency and want to understand the current state
You probably need more than a free tool if:
- You're spending $10K+/month and performance has been declining
- You suspect conversion tracking issues but can't pinpoint them
- Your agency says everything looks great but results aren't improving
- You're running multiple campaign types (Search, Shopping, PMax, Display) and they might be competing
The gap between a free audit and a professional audit isn't just more data points. It's interpretation. Knowing what to do about the findings is where the real value is. A free tool might tell you your Quality Score is low. A professional audit tells you why it's low and what specific changes will move it.
If you want something in between, our free audit tool runs 54 automated checks and gives you a scored breakdown with specific recommendations. It's more thorough than most free graders, and it connects directly to your Google Ads account for real data.
Frequently Asked Questions
They're accurate for what they check, but most only cover surface-level metrics. They can catch obvious issues like missing extensions or low ad strength, but they typically miss deeper problems like attribution misconfigurations, audience overlap, or cross-campaign cannibalization.
Most do. They connect via Google OAuth and request read-only access to your account data. This is generally safe, but always check the permissions being requested. A tool that asks for write access to run an audit is a red flag.
Free tools run automated checks against a set of rules. Professional audits add human analysis: context about your business model, competitor landscape, margin targets, and growth strategy. They also catch nuanced issues that automated tools can't, like whether your campaign structure makes sense for your sales cycle.
Using 2-3 different tools gives you better coverage since each one checks different things. But don't use more than that because you'll get conflicting recommendations and spend more time reconciling them than actually fixing issues.
Try a Smarter Free Audit
COREPPC runs 54 automated checks across your Google Ads account. Get a scored breakdown with actionable fixes in 60 seconds.
Start Free Audit
