Home / Compare
Five free tracking debuggers, fifteen capabilities, and the rows where another tool wins. Compiled from public documentation, dated and sourced.
Swipe the table to see the other tools
| Capability | Tag Master | Tag Assistant | Omnibug | Meta Pixel Helper | Analytics Debugger |
|---|---|---|---|---|---|
| What it sees | |||||
| Platforms decoded | 63 | Google only | ~69 | Meta only | GA4, GTM, Adobe + |
| Server-side GTM hits recognised | ✓ | – | – | – | – |
| Works on first-party endpoints | ✓ | – | – | – | – |
| How deep it goes | |||||
| Explains why a GTM trigger fired | – | ✓ | – | – | – |
| dataLayer monitor | ✓ | ~ | – | – | ✓ |
| Consent Mode V2 state | ✓ | ~ | – | – | ~ |
| Flags vendors firing without consent | ✓ | – | – | – | – |
| What you can do with it | |||||
| Block a vendor’s hits | ✓ | – | – | – | ✓ |
| Force GA4 DebugView | ✓ | – | – | – | ✓ |
| Inject a GTM container | ✓ | – | – | – | – |
| Element picker to GTM trigger | ✓ | – | – | – | – |
| Export captured hits | ✓ | – | ✓ | – | ✓ |
| Practicalities | |||||
| Interface | Side panel | External site | DevTools panel | Popup | DevTools panel |
| Last updated | Sep 2026 · v1.9.0 | Active | Jan 2025 | Active | Sep 2023 |
| Price | Free | Free | Free | Free | Free |
The other tools were compared in August 2026 from their public documentation and Chrome Web Store listings; the Tag Master column is current as of version 1.9.0, September 2026. Spotted something out of date? Tell us and we'll fix it.
No single debugger wins everywhere. These are the cases where another tool is the better answer — often alongside Tag Master rather than instead of it.
Only Google can explain its own container. When you need to know which trigger matched and what each variable resolved to, use Tag Assistant — Tag Master opens it for you with the container prefilled.
Broader raw vendor coverage: roughly 69 providers against our 63. If you work with a long tail of niche ad platforms and do not need server-side or consent auditing, it may cover more of your list.
The Meta helper reads its pixel from the inside — diagnostics and warnings straight from Meta. For deep single-platform troubleshooting it goes further than any third-party tool can.
The closest tool to this one in what it sets out to do: analytics and ad pixels together, with parameter validation on top. It carries around 22 platforms against our 63 and has a paid tier; we have no paid tier. Its own documentation does not mention Consent Mode auditing, server-side detection or hit blocking, which is not the same as saying it lacks them — we could not verify either way, so it is described here rather than scored in the table.
Tag Master next to one tool at a time: what only each of them does, and when the other is the better choice.
Side by side, and where Tag Assistant wins
Read the comparison → vs OmnibugSide by side, and where Omnibug wins
Read the comparison → vs Meta Pixel HelperSide by side, and where Meta Pixel Helper wins
Read the comparison → vs Analytics DebuggerSide by side, and where Analytics Debugger wins
Read the comparison →