I can see the Friend Lists of two other users who aren't friends: call them A and B. How can you see all mutual friends between A and B, instead of cross-referencing yourself inefficiently?

This solution fails. I don't understand this other recommendation quoted beneath: what ought be on https://searchisback.com/? It doesn't let me input A or B's names.

Use https://searchisback.com/.

It will generate a search query that looks like this:
where ID1 and ID2 are the Facebook IDs of the queried users.

  • The first link is working for me. What didn't work for you and what error you are getting. please explain.
    – serenesat
    Apr 19, 2017 at 11:50
  • @serenesat The 1st link works too, but I do not understand what steps to take there. What exactly do you input? I see no option for mutual friends between 2 other people?
    – NNOX Apps
    Apr 19, 2017 at 16:18
  • Just enter the username of first and second person, it will show the interaction between them. If you don't know the username, you can use their Facebook id.
    – serenesat
    Apr 19, 2017 at 18:37
  • have you found out a workable solution?
    – Ooker
    Apr 30, 2019 at 16:35

2 Answers 2


Follow this simple technique:

  1. Find Profile ID of B - say it is Profile_B

  2. Go to FB profile of A - say URL for which is facebook.com/profile_A

  3. Append URL with following text ?and=Profile_B. The final URL looks like facebook.com/profile_A?and=Profile_B

It would be finally redirected as https://www.facebook.com/friendship/Profile_A/Profile_B

You should be good with enough information.


Promising but currently not working solution

Social Graph can be a way to do this. However, at the moment of writing (2019), Facebook refuses to allow logging in because it is outdated. I have emailed the author about this.

Other defunct services: Nexus friend grapher, TouchGraph

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