twclid
Ad-click identifiers · X Ads (formerly Twitter Ads) · introduced ~2021
What is twclid?
What twclid does
When you click a promoted tweet or any Twitter Ads creative, X appends ?twclid=<token> to the destination URL. The token ties the click to the ad impression on X's side and lets X's Pixel-equivalent (Twitter Pixel / Universal Website Tag) report the conversion back on the destination.
twclid replaced an older system X used pre-2021 that depended on referrer headers. Like Meta and Google before it, X moved attribution from cross-site cookies into the URL itself as browsers tightened privacy plumbing.
How it differs from `t=` and `s=` on tweet links
twclid is on ad outbound URLs. The t= / s= parameters covered in the X share-URL deep dive are on organic tweet share URLs — different system, different purpose. A single click rarely carries both, since you're either clicking an ad or sharing a tweet, not both at once.
LinkClean strips twclid globally and strips t= / s= host-scoped to x.com and twitter.com (since t= is the timestamp on YouTube).
How LinkClean removes it
Default-on in the ads catalog. Same pipeline as fbclid + gclid + msclkid + ttclid + yclid.
Frequently asked
Is twclid the same as the t= on a shared tweet URL?
No. twclid is X Ads' click identifier — only on outbound ad clicks. t= and s= on tweet share URLs are organic-share trackers. Different systems, different jobs.
Did X have a click ID before twclid?
Not in URL form. Pre-2021 X relied on referrer headers and cookies. Browser-privacy changes made that unreliable; twclid moved attribution into the URL itself, the same pattern Meta and Google followed earlier.
Does LinkClean strip twclid on every site?
Yes — global, default-on. (twclid is unambiguous; no legitimate use of this name on the web besides X Ads.)
Clean tracking on iPhone, in one tap.
LinkClean strips ~80 vendor-specific tracking parameters from any link, from any app's share sheet — and preserves functional ones like hl, t (YouTube timestamp), and q (search). No account, on-device.