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Cold email UTM builder
Add encoded source, medium and campaign tags to an HTTP(S) destination URL.
Prepare your inputs
Use a destination you control or are authorized to share. Choose consistent campaign tags that describe the campaign rather than a particular recipient. Do not put email addresses or secrets into query parameters.
Runs in this browser. Inputs are not sent by this tool or saved in browser storage. Start with the fictional example; use redacted text for reviews.
How it works
The builder replaces existing utm_source, utm_medium and utm_campaign values while preserving other query parameters and fragments. Standard URL encoding handles spaces and punctuation.
Worked example
A landing page with an existing product query keeps that query when campaign tags are added. A campaign name containing spaces is encoded rather than pasted into an invalid URL.
Limits and interpretation
This does not test the destination, install analytics or establish that a recorded click came from a person. Review redirect behavior and your measurement definitions separately.
Examples are synthetic, not customer results. Zintara practical guide library