adlinter

# AdLint

> Privacy-respecting ad-tracking auditor for agencies and freelancers. Audits GTM containers, Google Ads accounts, Performance reports, and pixel exports from Meta, TikTok, LinkedIn, Pinterest, Twitter/X, and Snapchat. 178 checks across 10 sources. Audits run in the browser: export files are never uploaded, and there are no accounts.

AdLint is built for ad-tech consultants who need defensible, citable findings to put in client deliverables. The `/checks/<id>` library is the editorial source-of-truth for every finding the audit engine can emit. Each page explains what the finding means, why it matters, how to fix it, and includes a copy-pasteable citation paragraph for client reports.

## Core

- [Homepage](https://adlint.dev/): overview of the tool, free audit entry point, in-browser audits (files are never uploaded)
- [Check reference index](https://adlint.dev/checks): searchable index of all 178 audit findings, filterable by severity and source
- [Audit results](https://adlint.dev/audit): the audit dashboard agencies hand off to clients (only reachable after running an audit)

## Category landing pages (browse by source)

- [Google Tag Manager checks](https://adlint.dev/sources/gtm): 29 GTM container audit findings
- [Google Ads checks](https://adlint.dev/sources/ads): 34 Google Ads conversion-tracking audit findings
- [Google Ads Performance Report checks](https://adlint.dev/sources/report): 26 statistical and signal-quality findings
- [Cross-source consistency checks](https://adlint.dev/sources/cross): 29 checks comparing GTM, Google Ads, and Performance reports against each other
- [Meta Pixel checks](https://adlint.dev/sources/meta): 10 Meta Pixel and Conversions API findings
- [TikTok Pixel checks](https://adlint.dev/sources/tiktok): 10 TikTok Pixel and Events API findings
- [LinkedIn Insight Tag checks](https://adlint.dev/sources/linkedin): 10 LinkedIn conversion-tracking findings
- [Pinterest Tag checks](https://adlint.dev/sources/pinterest): 10 Pinterest Tag and Conversions API findings
- [Twitter/X Pixel checks](https://adlint.dev/sources/twitter): 10 X Pixel conversion-tracking findings
- [Snapchat Pixel checks](https://adlint.dev/sources/snapchat): 10 Snap Pixel and Conversions API findings

## Audit tools

- [GTM Container Auditor](https://adlint.dev/tools/gtm-auditor): 30 checks across Google Tag Manager containers
- [Google Ads Linter](https://adlint.dev/tools/google-ads-linter): 42 checks across Google Ads conversion settings
- [Performance Report Analyzer](https://adlint.dev/tools/performance-analyzer): 26 checks on Google Ads Performance reports
- [Full-Stack Audit](https://adlint.dev/tools/full-audit): 119 checks: all three Google sources together, plus cross-source consistency
- [Meta Pixel Auditor](https://adlint.dev/tools/meta-auditor): 10 checks across Meta Pixel and Conversions API
- [TikTok Pixel Auditor](https://adlint.dev/tools/tiktok-auditor): 10 checks across TikTok Pixel and Events API
- [LinkedIn Insight Tag Auditor](https://adlint.dev/tools/linkedin-auditor): 10 checks across LinkedIn Insight Tag
- [Pinterest Tag Auditor](https://adlint.dev/tools/pinterest-auditor): 10 checks across Pinterest Tag and Conversions API
- [Twitter/X Pixel Auditor](https://adlint.dev/tools/twitter-auditor): 10 checks across X Pixel
- [Snapchat Pixel Auditor](https://adlint.dev/tools/snapchat-auditor): 10 checks across Snap Pixel and CAPI

## Flagship checks (critical-severity, hand-written editorial)

- [Missing Google Ads Conversion Linker](https://adlint.dev/checks/missing-conversion-linker): the foundational tag every GTM container needs for Google Ads attribution
- [Google Ads Tags May Fire Without Consent](https://adlint.dev/checks/consent-violations): Consent Mode v2 compliance and measurement modelling
- [Duplicate Conversion Tracking](https://adlint.dev/checks/duplicate-conversions): the failure mode that looks good while it is happening; cross-source
- [E-commerce Data Layer Structure](https://adlint.dev/checks/ecommerce-datalayer-structure): the GA4 canonical `purchase` event shape
- [Purchase Conversions with Zero Value](https://adlint.dev/checks/zero-value-purchases): value-based bidding requires real revenue signal
- [Conversion Linker Sequencing](https://adlint.dev/checks/conversion-linker-sequencing): explicit Tag Sequencing prevents the race condition the linker exists to solve
- [Multiple Currency Codes](https://adlint.dev/checks/currency-consistency): mixed currencies are supported; what to check instead
- [Enhanced Conversions Missing User Data](https://adlint.dev/checks/enhanced-conversions-missing-data): how to actually populate the user_data parameter so the match rate is not zero
- [Conversion Tags Missing Error Handling](https://adlint.dev/checks/conversion-error-handling): Wait-for-Tags configuration prevents conversion loss on slow connections
- [No Primary Conversion Action](https://adlint.dev/checks/no-primary-conversion): Smart Bidding cannot work without a Primary target

## Audit infrastructure & governance

- [GTM Container Size and Tag Count](https://adlint.dev/checks/container-size-score): GTM's hard workspace size limit and the soft tag-count threshold
- [GTM Naming Convention Violations](https://adlint.dev/checks/naming-conventions): the prefix-based naming convention that speeds every audit
- [Documentation Completeness](https://adlint.dev/checks/missing-descriptions): the Notes/Description field as code comments for GTM
- [Potentially Stale Tags](https://adlint.dev/checks/stale-tags): tags with "old," "legacy," "backup," "deprecated," "temp," or "test" in their names

## Attribution and Smart Bidding

- [Smart Bidding Readiness](https://adlint.dev/checks/smart-bidding-volume): the 15-30 conversions/portfolio/month threshold
- [Attribution Window vs Sales Cycle Mismatch](https://adlint.dev/checks/attribution-window-mismatch): time-lag-distribution-driven window sizing
- [All Conversions Use Last-Click Attribution](https://adlint.dev/checks/struct-all-last-click): the case for Data-Driven Attribution
- [Account-Wide Attribution Chaos](https://adlint.dev/checks/struct-attribution-chaos): when an account uses too many attribution models without rationale
- [Greedy Impression Index](https://adlint.dev/checks/vtc-click-ratio): the view-through-conversion-to-click-conversion ratio diagnostic
- [ROAS Target Feasibility](https://adlint.dev/checks/roas-feasibility): tROAS targets vs historical achieved ROAS

## About

- [About Christopher Landaverde](https://adlint.dev/about): author page; bio, areas of expertise, GitHub link

AdLint is created by Christopher Landaverde, an ad-tech tracking specialist. Every check page carries the author byline plus a `lastUpdated` date. The editorial voice is direct, second-person, concrete, and citation-ready. Citation templates on each page are designed to be pasted verbatim into client deliverables.

Privacy posture: AdLint never uploads files. Audits run in the browser using a static JavaScript engine, and there is no account system. The only user data the server handles is optional: from the fifth audit, PDF export asks for an email address, which is forwarded to MailerLite (AdLint's email provider) without any audit data. Source code at https://github.com/ChristopherLandaverde/adlinter.

## License & reuse

The AdLint check engine and editorial content are written for citation in agency client deliverables. The citation templates on each `/checks/<id>` page are explicitly designed for paste-and-attribute use; source attribution back to AdLint is requested but not enforced.