Base64 & Base Converter

A powerful, all-in-one suite for Base64, Base32, Base58, and Base62 encoding. Fast, secure, and 100% client-side conversion in your browser.

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Mastering Base Encodings

Base64 vs Base64URL

Standard Base64 (RFC 4648) uses "+" and "/" which can cause issues in URLs or file systems. The URL-Safe variant replaces them with "-" and "_" and removes the padding "=" to ensure compatibility.

When to use Base32?

Base32 is ideal for human entry. Its 32-character set (A-Z, 2-7) is case-insensitive and avoids visually similar characters like "1", "8", or "0", making it perfect for TOTP codes (Google Authenticator).

The "Bitcoin" Standard (Base58)

Base58 was popularized by Bitcoin for wallet addresses. It removes characters that look similar (0OIl) and avoids special characters, balancing high data density with human readability.

Compact IDs with Base62

Base62 (0-9, a-z, A-Z) is the most compact way to represent large numbers using only alphanumeric characters. It is the industry standard for URL shorteners (like Bitly) and unique database identifiers.

Security & Privacy

Is my data safe?

Yes. Unlike other online tools that send your text to a server, LeetTools.dev performs all encoding and decoding locally in your browser using JavaScript. Your sensitive data never leaves your computer.

UTF-8 Support

Our tool fully supports Unicode (UTF-8). You can safely encode and decode emojis, non-Latin scripts, and special symbols without data corruption.