No, you cannot claim all the things in your Free Fire account without downloading the game.

• In-Game Actions: Many actions, like claiming daily rewards, opening loot boxes, or participating in events, require direct interaction within the Free Fire game itself.
• Account Access: You need to be logged into your Free Fire account to access and claim your in-game items, such as characters, skins, and currency.

However, you can redeem certain rewards outside the game:

• Redeem Codes: You can use the official Free Fire redemption website (reward.ff.garena.com) to redeem codes for in-game items. This requires logging in with your linked account (Facebook, Google, etc.).

While you can’t claim everything without the game, the redemption website offers a limited way to access some rewards.