Useful Link for check if STEAM user own already a game?

In those cases I usually add them on Steam. Then when accepted, I go to the storepage of the game, shows there if they have it on wishlist/own it.

While the browser can take a long time to render a long Steam game list, if you right click and choose View Source during that you get a file that you can easily and quickly search with Ctrl-F.

You can get this and more from the steam api if the user has his list set to public.

Ownership of single game is as follows and shows you own Cyberpunk as per this line.

http://api.steampowered.com/IPlayerService/GetOwnedGames/v0001/?key= --- my steam api key ---- &steamid= --- steam id of target --- &format=json&include_appinfo=1&appids_filter%5B0%5D= --- app id of game ---

with no spaces or --- marks.

Data returned will be "game count" = 0 if target does not own it. Or 1 with more details if they do.
Its meant to be used in a script for returning results but you can use the URL directly and just look at the results.

The only private thing is your steam api key. Its free but you have to request one from steam.

Screen snips of owning something and not owning something
here.

I have a plugin to make it more readable for testing but the raw data is the same just without any spaces, returns or colors.
I normally return it directly to a script making the call.

i try this 2 for now:
https://www.steamgifts.com/go/comment/TLJsArj
https://www.steamgifts.com/go/comment/3ys8fVy
and both very very fast thank you,very thank you to all people help me this very useful know,later days i will try apikey method too but for now this 2 already much better thank you very.

I usually use this site even though it wasn't designed for that. I found that even on my old computer it loaded huge libraries I couldn't even try on my browser.