Maybe it's useful for those lazy to click 3 times XDD.
I'll use the manual mode, for now.

I usually know what games I already own, and syncing doesn't help for DLC.

Now if your userscript allowed for automatically leaving giveaways for games you already own, THAT would be something else.

Thank you, ive been looking for this. I tend to forget to sync and this helps a lot.
I willl try it when i get home later

Interesting how many people voted for No

Very cool. I voted definitely. I'll install this when I get home.

Updated OP.

Updated!
I also made it sync automatically for when you press "Recieved" on your winnings page.

Updated!

WILL ALSO HIDE OWNED DLC NOW!!!!

The second functionally is the most useful and it would be great if I could remove my entry from a game I won too, but that's probably not possible or feasible. Thanks for the script!

Very nice! I linked it from the thread about avoiding multiple wins. It can definitely help there.

Bump!

I've been using this and it was very helpful to hide quite a lot of owned DLCs. However, I've noticed that the Slash It 2 DLCs (there are a few) don't seem to be hidden correctly. I wanted to report that here in case it's a bug in the script.

Thanks for this useful script! :)

EDIT: One example

Slash it 2 - Chinese Edition Pack (AppID 588830), is shown in the console on the list of "Already hidden:" items, but it shows in the giveaways page.

EDIT2: Tried to fix it running "localStorage.removeItem("hidden_ga");" in the console, then unmarking and marking as received an old GA. I saw a few "POST https://www.steamgifts.com/ajax.php net::ERR_INSUFFICIENT_RESOURCES", so I run it a couple of times (the third time there were no items left to hide). However, the Slash it 2 DLCs are still on the GA page even if they are (again) listed as "Already hidden" :/

You get around ten keys a day? :o

bump
thanks for nice script 👍

the script doesn't seem to be working for me at the moment.

I've had a couple of wins, but none of my owned DLCs are being hidden :(

Also - is there any way to trigger it, other than claiming a won giveaway?

This will also help with games no longer detected by the Steam Web API!

Updated database and code! Never win any owned game/dlc ever again!

Thank you so much! Script works perfectly. 😀

can anyone tell me why the script started removing wishlisted games?

For example, wishlisted game Warhammer Dawn of war 3 is in wishlist and in hidden filter now..
Same for Call of Duty games.. :/

Happened 1 week ago, but noticed just today when found out about Dawn of war