Yes! This tool operates entirely on your local browser. Your seed phrases and private keys are never sent to any server or stored anywhere. The conversion is performed using client-side JavaScript, ensuring your sensitive wallet information remains private.

We recommend using this tool on a secure, private device and always storing your wallet credentials in a safe, encrypted location after conversion.

Common reasons include:

• Migrating from Solflare to Phantom wallet
• Fixing "deprecated format" errors when trying to import keys
• Recovering access to wallets where you only have certain credentials
• Ensuring compatibility with newer wallet versions that prefer Base58 format over JSON
• Creating backups in different formats for redundancy
• Accessing the same wallet across multiple devices or applications

JSON format stores private keys in a structured format with additional metadata. It looks like a long string with brackets, numbers, and special characters. Base58 is a more compact representation that newer wallet versions prefer. It's a shorter string that only includes letters and numbers.

Phantom wallet now shows a "deprecated format" error for JSON keys and recommends Base58 format instead. Both formats represent the same underlying private key, just in different encodings.

No. Converting between formats doesn't affect any assets stored on the blockchain. These conversions simply provide different ways to represent the same private key, which is your credential for accessing your on-chain assets.

Your SOL, tokens, and NFTs are stored on the Solana blockchain, not in your wallet software. Converting your private key format just changes how you access those assets, not the assets themselves.