# Base58Check Encoder Decoder

> Understand Base58Check payloads, version bytes and checksums.

Mode: Runs locally.

## Supported behavior

Runs locally because Base58Check can contain private keys. This encoding is not encryption.

## Security and privacy

Sensitive inputs and calculations stay on your device. No secrets are sent to the backend or saved in browser storage. Clear the form and result when finished. These key tools have not received an independent security audit; do not use it with real funds.

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