So i saw somewhere online that you can u

I'll check the right reference for this card-method question.

Yes and no — the playing-card answer is yes with a real tradition behind it; the UNO answer is mostly no unless you're inventing your own system.

Regular playing cards (52-card deck)
This is a thing. It's usually called cartomancy, and the mapping to tarot is mostly mechanical:

• Hearts → Cups
• Diamonds → Pentacles (Coins)
• Spades → Swords
• Clubs → Wands (Batons)
• J, Q, K → Page, Knight, Queen, King

The piece that's missing is the 22 Major Arcana. Some readers add the Joker(s) for those, some use a separate22-card "trump" deck on the side. Reading style is similar — single pull, three-card, Celtic Cross — but the meanings are leaner because you lose the named archetypes (Tower, Death, Star, etc.).

UNO cards
Not really. UNO has 4 colors so the suit mapping is fine, but the deck is built around game mechanics (Skip, Reverse, Draw Two, Wild, Wild Draw Four). Those action cards don't have stable symbolic meaning in any existing card-divination tradition. If you assign them meanings yourself, it's a homemade system — fine if you want that, just own that you're the one writing it.

So if your real question is "I want to do a reading tonight and don't own a tarot deck" — go with a regular 52-card deck +1 Joker. Plenty of readers work that way. UNO is a stretch unless you're treating it as a creative exercise.

Want a quick starter spread to try with regular cards?