Enter the page you are linking to and name the traffic: source, medium and campaign. The tagged link updates as you type, the tags go before any #, and Copy link puts it on your clipboard.
The link is built in your browser. Nothing you type is sent to a server or stored, and the address is never opened. What this does not do: open or test the link, or judge whether your source and medium names suit your reports. It builds the tagged URL from what you typed. To check a link someone else built, use the UTM validator.
Next: check a link someone else built, or tag many links at once.
How it works
Type the full address you want people to land on, starting with https:// or http://. If it already has a query or a #section, they are kept.
Fill in source, medium and campaign. Add content to tell two links in one campaign apart, and term for a keyword. Values are lowercased unless you untick the box.
The tagged link appears under the form as you type. Copy link puts it on your clipboard. Need more than a few? The bulk generator tags up to 500.
The parameters
SourceTrack's tracker reads all six on your own traffic. The builder asks for the first three and offers the next two.
| Parameter | What it tells you | Example | In this builder |
|---|---|---|---|
| utm_source | Where the click comes from: a site, a platform or the name of a newsletter. | newsletter | Required |
| utm_medium | The kind of link it is, such as email, social or cpc. | Required | |
| utm_campaign | The campaign the link belongs to. Every link in one campaign shares it. | spring-launch | Required |
| utm_content | Tells two links in the same campaign apart, such as two buttons or two ad versions. | hero-button | Optional |
| utm_term | A keyword, mostly used for paid search. | running-shoes | Optional |
| utm_id | An identifier for the campaign, for example an ID from an ad platform. | abc123 | Not set here; one already on the link is left as it was |
Why UTMs break
None of these shows an error when you click the link. They show up later as visits with no source, or one campaign split into two.
A browser keeps everything after a # on the visitor's device and never sends it to a server, and SourceTrack's tracker reads only the part of the link before it. A link like page#plans?utm_source=news records no source.
The builder always writes the tags before any #.
When utm_source appears twice, SourceTrack reads the first one and ignores the rest. The second one may be the one you meant.
The builder replaces a utm_ parameter that is already on the link, so a link never carries two.
Parameter names must match exactly: UTM_Source is ignored, utm_source is read. Values are trimmed and lowercased when SourceTrack stores them, so Google and google are one value there. Some other tools keep them apart.
The builder lowercases the values unless you switch that off, and always writes the parameter names in lower case.
In a link's query string + and %20 both mean a space, so a real plus sign has to be %2B. Raw spaces, a mix of + and %20, or characters such as & and # inside a value are easy to corrupt when a link is pasted from tool to tool.
The builder encodes every value once, with + for a space.
Naming
These are habits, not rules SourceTrack enforces. Pick a convention, write it down and keep to it, so the same thing is always spelled the same way.
| Habit | Do | Avoid | Why |
|---|---|---|---|
| Lowercase everything | spring-launch | Spring-Launch | One spelling means one name in every report. SourceTrack lowercases values when it stores them, and some other tools do not. |
| Hyphens, not spaces | spring-launch | spring launch | A space becomes + or %20 in the link and is easy to corrupt when the link is pasted from tool to tool. |
| One name for each source | LinkedIn, li, linked-in | Pick one spelling per source and reuse it, so one source is not counted as three. | |
| A short fixed list of mediums | email, social, cpc | a new medium for every link | Write the list down once. Mediums group links by kind, so a new word each time defeats the grouping. |
| Campaign names that still make sense later | spring-launch | campaign1, test2 | You will read the name in a report months from now, without the spreadsheet you built it in. |
| No personal data in a value | newsletter | jane@example.com | Links are copied, forwarded and logged by many systems. Keep names and email addresses out of them. |
FAQ
A UTM builder is a form that adds UTM parameters to a link for you. You enter the page address and a source, a medium and a campaign name, and it returns one link with the tags added in the right place and encoded once, ready to paste into an email, an ad or a post. This one runs in your browser.
This builder asks for utm_source, utm_medium and utm_campaign, so every link you make says where it came from, what kind of link it is and which campaign it belongs to. utm_content and utm_term are optional. SourceTrack's tracker reads those five and utm_id. If a link has no utm_medium, SourceTrack records its medium as none.
Yes, unless you untick the box. SourceTrack trims and lowercases UTM values when it stores them, so Google and google are one source there, but some other tools keep them apart, so one lowercase spelling everywhere is the tidy choice. The address itself is never changed, and parameter names are always written in lower case because SourceTrack matches them exactly.
A utm_ parameter with the same name is replaced, whatever its letter case, so the link never ends up with two utm_source values. Other parameters keep their text and order. A utm_ parameter the builder is not setting, such as utm_id, is left as it was.
A browser never sends the part of a link after a # to a server, and SourceTrack's tracker reads only the part before it. Tags placed after the # would be lost, so the query goes first and the #fragment stays last. If your address has a # already, it is kept at the end.
No. The link is built in your browser. The page does not open the address, does not send it to a server and does not keep it in cookies or local storage. Copy link puts the result on your clipboard only when you press the button.
SourceTrack's tracker reads the UTM parameters on your own traffic and shows revenue by source. One script tag, 28 days free.
No credit card required. See how attribution splits revenue by source, or check your setup with the free tracking audit.
Sources ranked by the revenue they brought in.
