Build properly tagged campaign links
Stop guessing where traffic comes from. Tag every link with UTM parameters that work in Google Analytics, GA4 and modern analytics.
Where the link is posted
Type of traffic
Campaign name
Differentiator for A/B
Paid search keyword
Tagged URL90 chars
UTM 101: source / medium / campaign are the big three — most analytics tools group reports by these. utm_content is great for A/B testing the same post. utm_term is only for paid search keywords (Google Ads).
How it works
1
Paste the destination URL
Where you want people to land.
2
Fill source / medium / campaign
These three are required for sensible reports.
3
Copy the tagged URL
Share it anywhere — analytics will attribute it correctly.
Why use Toolstack's UTM Link Builder?
100% private
Your file never leaves your device — everything runs locally in your browser.
Instant
No upload, no queue. The result is ready as soon as your laptop finishes the math.
Free forever
No signup, no credit card, no daily limits for the core features.
Open standards
We use proven open-source libraries — no proprietary lock-in, no shady tracking.