Connect your wallet containing the tokens, enter the amount you want to burn, and confirm the transaction. The tokens are permanently destroyed via the SPL Token Program's burn instruction. This action is irreversible.

Yes. The CoinDevTools burn tool is free to use. You only pay the Solana network fee, which is typically under $0.01. There's no CoinDevTools service fee for burning.

No. You can only burn tokens in a wallet you control (that you're connected with). This is a blockchain-level security feature — only the token account owner can authorize a burn.