How does it work?
- Type or paste your data.
- The result appears instantly.
- Copy or download the result.
Why use UTM Builder?
- ✓ 100% free, no limits, no watermark
- ✓ No sign-up, no install
- 🔒 Files processed locally: full privacy
- 📱 Works on desktop, tablet and mobile
Frequently asked questions
Which UTM parameters are required?
utm_source, utm_medium and utm_campaign. utm_term and utm_content are optional.
Should I use capitals?
No: use lowercase and hyphens, as Google Analytics treats “Facebook” and “facebook” as different.
Do UTMs work with GA4?
Yes, GA4 reads utm_source, utm_medium, utm_campaign, utm_content and utm_term.
Should internal links have UTMs?
Never — they overwrite the visit's original source.
Is this tool really free?
Yes, 100% free, with no sign-up, no watermark and no usage limit.
Are my files safe?
Yes. Processing happens directly in your browser: your files are never uploaded to a server or stored.