# mibextid meaning — Facebook's share-link tracker

- Canonical: https://linkclean.app/trackers/mibextid/
- Updated: 2026-07-22
- Author: Ken Tominaga (https://ken0nek.com)
- Get the app: https://apps.apple.com/us/app/linkclean/id6758604043

Parameter: `mibextid` · Category: Social · Vendor: Meta (Facebook)

> mibextid is the share-identifier Facebook's mobile apps add to every link you share — separate from fbclid (which is for paid-ad clicks). It identifies the *sharing* session, not an ad click. Strip it before forwarding.

## What mibextid does

When you Share a link from the Facebook app (or Messenger, sometimes WhatsApp depending on the version), Meta appends ?mibextid=<token>. The token encodes which app, which session, and is joined server-side to your Meta account.

## mibextid vs fbclid

Two tokens, two pipelines, both safe to strip: fbclid lands on links *clicked from Facebook ads* (paid-attribution; the destination's Meta Pixel reads it). mibextid lands on links *shared via Meta apps* (share-attribution; Meta reports the click back from the share-graph).

The same destination URL can carry both — fbclid because someone clicked an ad, mibextid because they re-shared it. Strip both as a pair.

## How LinkClean removes it

Default-on in LinkClean's social catalog. Same vendor-specific-token-no-functional-use logic as fbclid / ttclid / yclid.

## Why it shows up everywhere

Anyone sharing news, recipes, products, or videos via Facebook or Messenger adds mibextid to the link without knowing. Most people forwarding “look at this” links via Messenger or SMS are unknowingly amplifying Meta's measurement graph.

## Example

Looks like this in a URL: `https://example.com/article?mibextid=Zbwa3y`

After LinkClean: `https://example.com/article`

## Frequently asked

**What does mibextid stand for?**

Best guess from Meta's app code: a “Mobile Internal Browser EXTension ID” or similar internal abbreviation; Meta has never published an official expansion. The behavior is the documented part.

**Does removing it break anything?**

No. The destination doesn't read it — only Meta's analytics infrastructure does, after the page has loaded.

**Why is mibextid different from fbclid?**

They serve different purposes. Per-click identifiers (fbclid, gclid) credit ad spend. Per-share identifiers (mibextid, igshid) measure organic sharing. Meta cares about both — strip both.

**Does any destination site ever use mibextid?**

No (verified across every site in our catalog). It exists for Meta's measurement only.


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LinkClean removes tracking parameters from links on-device — free to clean, one-time Pro. https://linkclean.app/ · Cite freely with attribution.