Here are common places that (as of recent reports) advertise no‑deposit bonuses — plus the key caveats you must check before signing up. I looked up current offers and state restrictions because no‑deposit promos and availability change often.

Quick list of notable options (verify the exact current offer and whether it applies in your state):

• BetMGM Casino — reported no‑deposit "free play" (examples: $25 in some states; $50 in WV) for new accounts in regulated US states (NJ, PA, MI, WV). Availability depends on state licensing and you must verify location and terms. (PokerNews.com)
• Borgata (MGM Group) — reported small no‑deposit free play offers (e.g., $20) for regulated NJ/PA/MI/WV markets. Terms and eligible states vary. (PokerNews.com)
• Licensed regional US sites (state casinos like DraftKings, FanDuel, BetRivers) sometimes run no‑deposit or free‑play promotions for new customers in the states where they’re licensed — check each site for current state‑specific offers. (These offers rotate frequently; use the operator’s site for the exact current promotion.) (PokerNews.com)
• Social / sweepstakes casino platforms (Rush, Jumbo88, Pulsz, etc.) — these give free credits or sweepstakes coins on signup and are available in many U.S. states because they operate under sweepstakes laws rather than as regulated real‑money casinos. They’re useful if you want to play without depositing, but the mechanics and cash‑out rules differ from regulated casinos. (PokerNews.com)
• International casinos that advertise no‑deposit free spins or credits (LeoVegas, PlayOJO, Bitstarz, MrQ, etc.) — widely reported in roundup articles, but most are licensed outside the U.S. and may not accept U.S. players (or are restricted by state). If you’re in the U.S., these offers are often not available or are limited to certain states. (AboutSlots.com)

Important things to check before you sign up or play

• State legality and licensing: Online casino availability and no‑deposit offers are state‑specific in the U.S. (e.g., NJ, PA, MI, WV, etc.). Don’t assume a U.S. offer will work in your state — check the operator’s site and your state’s regulator. (PokerNews.com)
• Wagering requirements and max cashout: No‑deposit bonuses almost always carry wagering requirements (e.g., 20x–40x) and/or caps on how much you can withdraw from winnings. Read the full T&Cs — the headline free amount is rarely fully withdrawable without meeting conditions. (AboutSlots.com)
• Game restrictions: Free spins or free play are often limited to specific slots or game types; some games may be excluded from clearing wagering requirements. (AboutSlots.com)
• Verification & KYC: To withdraw winnings you’ll usually need to verify identity (ID, address, sometimes SSN). That can take time and you may be ineligible if you fail verification. (PokerNews.com)
• Social vs real‑money models: Sweepstakes/social casinos (Rush, Jumbo88, etc.) offer different mechanics (coins vs sweepstakes coins) and different cashout paths; they can be a legal way to play without depositing in many states but read how their prize redemptions work. (TalkSport.com)
• Safety & reputation: Use licensed, reputable operators with clear licensing info (state regulator, UKGC, MGA, etc.), good reviews, and transparent terms. Beware of sites that hide wagering rules or delay withdrawals.

How to proceed (safe, practical steps)

1. Decide if you want regulated real‑money casinos (state‑licensed) or social/sweepstakes casinos (available in more states).
2. Visit the operator’s official site and confirm: current no‑deposit offer, eligible states, wagering requirements, max cashout, and KYC rules. (Promo pages are the authoritative source.) (PokerNews.com)
3. Only register at operators licensed in your state (for real‑money play) and keep screenshots of offers and T&Cs when you claim a bonus.

If you want, I can:

• Check current no‑deposit offers for a specific state (e.g., New Jersey, Pennsylvania, Michigan) and list exact promos, wagering requirements, and max cashouts (I’ll verify each on the operator’s site).
• Or summarize typical T&C examples (common wagering multipliers, cashout caps) so you know what to expect.

Which would you prefer?