Best Cookie Audit Tools Compared (2026)

Running a cookie audit is the first step to cookie compliance. But which tool should you use? We tested the most popular options on real websites to compare accuracy, features, and pricing.

What to Look for in a Cookie Audit Tool

Before the comparison, here's what matters:

• Pre-consent vs. post-consent detection — Does the tool check what fires before consent? This is the most critical compliance question and most basic scanners skip it entirely.
• Consent banner testing — Does it detect and interact with your consent banner?
• Multi-page scanning — Can it scan beyond just the homepage?
• Compliance scoring — Does it give you an actionable score, or just a raw cookie list?
• Google Consent Mode detection — Is GCM v2 checked? This is now required for Google Ads in the EEA.

The Tools Compared

1. Tag Leak

Best for: Complete compliance audit with pre/post-consent detection

Tag Leak is a dedicated cookie compliance scanner that runs a two-pass audit: first it checks what fires before any consent interaction, then it checks what changes after consent. This pre-consent vs. post-consent approach catches the most common violation — cookies loading before users agree.

What it checks:

• Pre-consent tag firing (the #1 compliance issue)
• Consent banner detection across 50+ CMP selectors
• Google Consent Mode v2 audit (all 7 parameters, scored)
• IAB TCF v2.2 detection
• 6 security response headers
• Post-rejection behavior (do cookies actually stop after "Reject"?)
• Regulation-specific compliance (GDPR, CCPA, UK GDPR, LGPD, POPIA, PDPA)

Scoring: 0-100 compliance score with severity-categorized findings (critical, warning, info).

Multi-page: Up to 100 pages via sitemap and link discovery.

Pricing: Free for single-page scans. Starter ($19/mo) for 25 pages per scan and 3 monitored sites. Pro ($49/mo) for 100 pages, 20 monitored sites, and geo-scanning from 6 regions.

Standout feature: The two-pass detection. Most tools just list what cookies exist — Tag Leak tells you which ones violate consent rules by firing too early.

2. Cookiebot Scanner

Best for: Quick free scan if you already use Cookiebot CMP

Cookiebot offers a free cookie scanner that crawls up to 5 pages. It's designed to feed into their CMP product.

What it checks:

• Cookie detection and categorization
• Third-party cookie identification
• Basic consent banner check

What it doesn't do:

• No pre-consent vs. post-consent distinction
• No compliance scoring
• No GCM v2 audit
• No security headers
• No regulation-specific analysis

Pricing: Free scanner. CMP starts at ~$15/month.

Limitation: The scanner is a lead-gen tool for the Cookiebot CMP. It tells you what cookies exist but not whether they violate consent rules. If you already use Cookiebot as your CMP, this is useful for maintenance. For an actual compliance audit, it's insufficient.

3. OneTrust CookiePro

Best for: Enterprise compliance programs

OneTrust's CookiePro includes a cookie scanner as part of their consent management platform. It's comprehensive but priced for enterprise.

What it checks:

• Detailed cookie inventory
• Cookie categorization
• Third-party tracking detection
• Integration with OneTrust CMP

What it doesn't do:

• No standalone scanner (requires CookiePro subscription)
• No public compliance scoring
• Limited pre/post-consent testing
• No GCM v2 audit

Pricing: Enterprise pricing (typically $500+/month). Not practical for small teams or individual websites.

Limitation: You're buying a full CMP suite, not just an audit tool. Overkill if you just need to scan and fix.

4. Osano Cookie Consent Scanner

Best for: Checking cookie presence with a simple interface

Osano offers a free cookie scanner that identifies cookies on a page and categorizes them.

What it checks:

• Cookie detection
• Category classification (analytics, advertising, etc.)
• Cookie duration

What it doesn't do:

• No consent banner testing
• No pre-consent behavior analysis
• No compliance scoring
• No GCM or TCF detection

Pricing: Free scanner. Consent platform starts at ~$100/month.

5. 2GDPR Cookie Checker

Best for: Quick, free spot check

2GDPR is a simple free tool that lists cookies found on a single page.

What it checks:

• Cookie list with names and domains
• Basic categorization

What it doesn't do:

• No multi-page scanning
• No consent interaction
• No compliance analysis
• No scoring

Pricing: Free.

Limitation: Very basic. Lists cookies but provides no compliance context.

Side-by-Side Comparison

| Feature | Tag Leak | Cookiebot | CookiePro | Osano | 2GDPR | |---|---|---|---|---|---| | Pre/post-consent detection | Yes | No | Limited | No | No | | Compliance score (0-100) | Yes | No | No | No | No | | Consent banner testing | Yes | Basic | Yes | No | No | | GCM v2 audit | Yes | No | No | No | No | | IAB TCF detection | Yes | No | Yes | No | No | | Security headers | Yes | No | No | No | No | | Multi-page scanning | Up to 100 | Up to 5 | Unlimited | 1 | 1 | | Regulation analysis | 6 regulations | No | Limited | No | No | | Post-rejection check | Yes | No | No | No | No | | Free tier | Yes | Yes | No | Yes | Yes | | Geo-scanning | 6 regions | No | No | No | No |

Which Tool Should You Use?

Use Tag Leak if you want a complete compliance audit that tells you whether your cookies actually violate consent rules — not just what cookies exist. The pre/post-consent detection and compliance scoring make it the most actionable option. Run a free scan here.

Use Cookiebot scanner if you already use Cookiebot CMP and just want to check your cookie inventory within their ecosystem.

Use CookiePro if you're an enterprise with a dedicated privacy team and need a full consent management suite with integrated scanning.

Use a free spot checker (Osano, 2GDPR) if you just want a quick list of cookies on a single page — but know that these won't tell you if you're actually compliant.

How to Run a Cookie Audit

1. Scan your homepage first to see your baseline compliance score
2. Review findings — focus on critical issues (pre-consent tracking) first
3. Check multi-page — your homepage might be clean but inner pages often have different tag configurations
4. Test post-rejection — click "Reject All" and verify tracking actually stops
5. Set up monitoring — compliance can break silently when marketing adds new tags

The compliance landscape changes constantly. New scripts get added, CMPs get updated, and regulations evolve. A one-time scan isn't enough — ongoing monitoring catches regressions before regulators do.