How to use this tool
Fill in the fields above and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
Formula
Adds or replaces utm_source, utm_medium and utm_campaign URL parameters.
Example
A landing-page URL receives the supplied source, medium and campaign parameters.
Prepare your inputs
Enter an absolute HTTP or HTTPS destination and consistent campaign labels. Do not include personal data in parameters.
Understand the result
The result replaces matching campaign parameters while preserving unrelated parameters. Analytics attribution depends on the receiving analytics setup.
About this version
This page uses a shared calculation method. Industry and country labels provide a browsing context; they do not change the formula or imply specialist or local regulatory validation. Currency labels do not perform currency conversion.
Limitations and assumptions
General-purpose estimate only. It does not apply country-specific tax rates, statutory payroll rules, accounting standards, or legal requirements. Verify local assumptions before business use.