Linkstamp – UTM Link Builder

Linkstamp builds campaign links with UTM parameters for the page you are on. Click the toolbar icon and the current tab's address is already filled in. Add a source, a medium and a campaign, check the live preview, and copy the finished link with one click. What you can do - Start from the current page: its address is filled in when you open Linkstamp, or type any address yourself. - Fill in Source, Medium, Campaign, Term and Content. A collapsible GA4 section adds Campaign ID, Source platform, Creative format and Marketing tactic. - Copy URL copies the whole tagged link. Copy parameters copies only the query part, ready to paste into an ad platform's tracking template. - Existing query parameters and the #fragment are kept. A filled field replaces an existing tag of the same name instead of adding a duplicate. - Ad-platform macros such as {{campaign.name}} or {lpurl} stay literal, so the platform can fill them in. - Presets: save a set of values under a name, then apply it from a list. Mark one preset as the default and it is applied when you open the builder, unless unfinished edits are waiting. - Memory: without a default preset, the values you used last come back next time, and unfinished edits are never thrown away. The page address itself is never stored. - Export your presets to a JSON file and import them on another computer. An import never changes or deletes presets you already have. - Imports .backup.xml files exported by the UTM Builder extension (Linkstamp is an independent project and is not affiliated with it). - Optional link formatting: lowercase what you typed and turn spaces into dashes in the finished link, with ad-platform macros left exactly as typed. Off by default. - Open in tab: the same builder in a full browser tab, for long addresses. Private by design There is no account, no server, no analytics and no ads. Linkstamp makes no network requests at all; its content security policy blocks them. Your presets, remembered values and settings are stored only in this browser and are never synced or sent anywhere. It does not run in incognito windows. Permissions in plain words - activeTab: when you click the toolbar icon, Linkstamp reads the address of the tab you are on, so it can fill it in. It reads nothing else from the page and nothing from other tabs. - storage: keeps your presets, remembered values and settings in this browser, and passes the current page URL and values, in memory only, to the builder opened by Open in tab.