GA4 treats Newsletter and newsletter as two different sources. A single inconsistency can split a campaign across two channel groups and make the data useless.
What it does
Build canonical UTM-tagged URLs (source, medium, campaign, term, content). Bulk-validate pasted URLs, flags case mismatches, missing fields, source/medium combinations that break GA4 channel grouping.
How to use it
- Open /tools/utm-builder/ in your browser.
- Enter the URL or domain you want to audit (or paste the inputs the tool requests for that specific check).
- Run the audit and review the per-check results inline.
- Copy the AI fix prompt from the bottom of the results and paste it into Claude / ChatGPT / Codex, the tool generates a domain-aware prompt that names every issue found.
- Apply the fixes to your source tree and re-run to confirm.
Why this exists
Most professional tools in this category cost $99 to $499 per month, lock results behind logins, or run on slow Chrome backends. The jwatte.com tool suite is built on three principles:
- Free + ungated, no signup, no quota
- Transparent, every check explains what it measures and how
- AI-augmented, every output produces a prompt that turns the audit into a fix in one paste
Companion tools
This tool pairs with the rest of the jwatte.com tools hub. For audits at scale, queue it inside Mega Batch. For deep single-page review, run it alongside Mega Analyzer.
Reference
- /tools/utm-builder/, live tool
- /tools/, full tool hub (60+ free tools)
- /about/, about the author + the framework behind these tools
