https://example.com/recipe/42
After LinkCleanhttps://example.com/recipe/42
fb_action_ids
What is fb_action_ids in a URL?
What Facebook's SDK says they are
Facebook's iOS SDK, in version 3.13.0 (tagged in March 2014), has a class for "an App Link from Facebook". It reads fb_action_ids and fb_action_types from the link, splitting each on commas, and documents them as the "List of the ids of the actions for this target" and the "List of the types of actions for this target". Its ref field is described as a "Reference breadcrumb provided during creation of story", and Facebook's Android SDK fills the same field from fb_ref.
The SDK's own test builds a destination of the form target-url.com/?deeplink=1&fb_action_types=action1,action2&fb_source=source&fb_ref=ref1,ref2. That is where the four tags sit: on the address of the page the story linked to.
What they reveal
They tell the destination that the visit came through Facebook and which actions, by ID and type, the link was attached to. The SDK does not say whether an action ID can be traced to the person who took the action, so this page does not claim it either way.
How LinkClean removes them
Default-on and global. LinkClean strips these four names wherever they appear, and no other fb_ parameter. The page loads the same without them. AdGuard's filter and Brave strip all four, and ClearURLs strips fb_action_ids and fb_action_types.
They are a different thing from fbclid, Meta's per-click identifier, and from mibextid, the share token of the Facebook app. A link can carry any of them.
Frequently asked
Where do the fb_ tags come from?
From Facebook. Its iOS SDK reads them from App Links that Facebook opens, and documents them as action IDs, action types and a reference breadcrumb.
Is fb_action_ids the same as fbclid?
No. fbclid is a click identifier. fb_action_ids lists the actions a link was attached to.
Is it safe to remove the fb_ tags?
Yes. The page is addressed by the rest of the link, and none of the four is needed to load it.
Clean tracking on iPhone, in one tap.
LinkClean strips 250+ 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.
