UTM Builder — Campaign URL Generator
Build campaign URLs with UTM parameters — source, medium, campaign, term, and content tracking tags.
How it works
- 1Configure your options above
- 2Click "Build UTM URL" — processing happens in your browser
- 3Copy or download the result
What to do next
About UTM Builder
UTM Builder runs the web and productivity utility job locally inside your browser. Build campaign URLs with UTM parameters — source, medium, campaign, term, and content tracking tags. The work happens on your machine, the result is generated on your machine, and the page exposes the controls you need to drive it without burying them in menus.
The processing pipeline is straightforward: your input is parsed by standard browser APIs, transformed according to the options you select, and serialised back into a downloadable result. The 0 MB per-file ceiling matches what a typical browser tab can handle without paging to disk.
UTM Builder sees the most use from product managers comparing options and marketers running campaigns, but the design is intentionally generic enough that you do not need a specialist background to get a good result. The defaults aim at the most common case so a first-time user can get the right output without changing any settings.
The execution model is straightforward: your file is bytes in the tab's memory, the engine reads those bytes, computes the result, and hands the result back to the browser. The transformation happens locally, which is why the tool keeps working when your network connection drops mid-job and why it produces the same result every run for the same input.
Reach for UTM Builder when you need a predictable result on a single file. The page works on the first visit, the controls are visible without a menu, and the output is delivered the moment the engine finishes.
Once the engine finishes, the output is offered as an immediate download. There is no preview gate, no email-wall, and no "register to download" intermediary — the file is yours the moment it is ready.
On limits: 0 MB per file is the ceiling. Output formats and quality settings are listed in the controls panel above, and they apply to every run.
UTM Builder sits in a small group of related tools. Useful neighbours include UTM Parser, Query String Remover, URL Validator, and URL Canonicalizer. They are designed to compose: the output of one is a sensible input to the next, so a multi-step task is usually a sequence of single-click operations.
UTM Builder keeps the control set focused. Every option on the page is there because a real workflow needs it, and the defaults aim at the most common case so a first-time user can get the right output without changing any settings.
UTM Builder is structured around the idea that a useful tool should be its own page. Open the page, do the work, close the tab — the page is the entire product. There is no onboarding flow because there is nothing to onboard into.
UTM Builder fits the gap where opening a desktop app feels heavy and writing a script feels overkill. The page handles the common web and productivity utility task with sensible defaults so a single visit usually completes the job; for highly specialised work, a dedicated desktop application can offer more knobs to turn.
Tips from users who reach for UTM Builder regularly: process one input first to confirm the settings produce what you expect before committing to a batch; treat the page as the working surface and avoid leaving large jobs running in a backgrounded tab where the browser may throttle JavaScript; and if a particular file fails, check whether the source is intact by opening it in its native viewer — most "tool errors" are actually input errors.
For most failure modes, refreshing the page and re-running the job is enough — the engine has no persistent state to corrupt. If the same input fails twice in a row, the input itself is most likely the problem (a truncated file, an unexpected variant of the format, or a stream the engine does not recognise).
If UTM Builder solved your problem, sharing the page link with someone who has the same problem is the most useful thing you can do. The catalog grows mostly through word of mouth; visitors arriving through a recommendation tend to be the ones the tool serves best.
How it works
- 1Open UTM Builder in your browser. The page loads quickly and the tool is ready to use the moment it becomes interactive.
- 2Select the web utility file you want to process — drag-and-drop and the file picker both work.
- 3Adjust the options to match what you need. Sensible defaults cover the most common case, so you can usually skip this step.
- 4Click to start the job. The engine (standard browser APIs) processes the input in the page; you can watch the progress indicator until it completes.
- 5Grab the output as soon as the run completes. You can also copy the result instead of downloading if the next tool in your workflow accepts pasted input.
- 6Re-run with different settings as often as you want. Each run produces a fresh output and the original file on disk is never modified.
Common use cases
- Pull a quick reference number for a status update using UTM Builder.
- Generate a temporary asset for a social post.
- Compare two product variations side by side.
- Validate a setting before circulating it to a team.
- Audit a marketing page before launch.
- Create a placeholder image for a wireframe.
- Preview how a result looks before deploying it.
- Run a fast accessibility check before publishing.
- Generate a campaign asset in seconds for a quick test.
- Plan content without paying for a SaaS dashboard.
FAQ
What are UTM parameters?
Tags appended to URLs to track campaign traffic in Google Analytics and other analytics tools.
Required fields?
Source, medium, and campaign are the three core UTM parameters. Term and content are optional.
Naming conventions?
Use lowercase, consistent naming (e.g., "google" not "Google"). Underscores or hyphens for spaces.
Private?
Yes — built locally.
Google Analytics?
UTM parameters are automatically recognized by GA4 and Universal Analytics.
Multiple URLs?
Build one URL at a time. Copy the result and change parameters for variations.
Is there a desktop version of UTM Builder?
No installation is needed. UTM Builder runs as a normal web page, with no browser extension, no native helper, and no separate desktop client to download. That is partly a privacy choice — extensions can request broad permissions, while a regular page is sandboxed by default — and partly a convenience one: you can use UTM Builder on any computer you have temporary access to without leaving anything installed on it.
Can I use UTM Builder for commercial work?
UTM Builder can be used for personal and commercial work alike — there is no separate "business" licence to purchase. The output you generate is yours to use however you want, including in client deliverables, internal documents, or commercial products. Favtoo's only ask is fair, individual use; the tool is not designed to be embedded as a backend service or wrapped behind an API for resale.
Does UTM Builder match what professional tools produce?
UTM Builder is built on standard browser APIs, which is the same class of engine used by professional web and productivity utility pipelines. For deterministic operations, the output is byte-identical to what an equivalent CLI run would produce; for operations involving a codec or a model, the result is well within the range of what comparable tools generate. If you have a specific reference output you need to match, run a small test job first to confirm the configuration produces what you expect.
Why does UTM Builder feel slow on large inputs?
Most jobs finish in seconds. Speed scales with input size and with how many CPU cycles your browser tab has available — the engine runs in your browser, so it shares resources with whatever else you have open. For inputs near the 0 MB ceiling, expect anywhere from a few seconds to roughly a minute on a typical laptop. Closing other heavy tabs noticeably speeds things up.
Why did UTM Builder reject my input?
Failures usually fall into one of three buckets: the input is in an unsupported format, the input is over the size cap, or the input is structurally malformed (a truncated download, a partial export, or a stream the engine does not recognise). The first two are easy to confirm — check that your file is in a supported format and that it is below 0 MB. For the third, opening the file in its native viewer first is the fastest way to confirm the source is intact.
Are jobs run with UTM Builder stored anywhere?
Favtoo keeps no copy of your file because Favtoo never receives your file. UTM Builder runs entirely in your browser, the input is held only in your tab's memory, and closing the tab discards it. There is no opt-in cloud history, no "recent jobs" panel synced to an account, and no server-side retention to configure — the architecture simply has nowhere for your file to be stored.
Are there any hidden fees with UTM Builder?
UTM Builder is free to use. The processing runs in your browser, which keeps the per-user cost low enough that the tool can be offered openly. The download is the same file the engine produced — you can use it for as many runs as you need.