@scure/base

I've used @scure/base across several projects requiring encoding operations, and it's become my go-to replacement for packages like bs58 and base-x. The zero-dependency approach eliminates supply chain risk entirely—critical when you're dealing with cryptographic operations or sensitive data encoding. Paul Miller's audit-focused approach means the code is clean, readable, and has been reviewed by security researchers.

The API is straightforward and consistent across all encoding schemes. Each encoder exposes encode/decode methods that properly validate input and throw clear errors on malformed data. I particularly appreciate that it doesn't silently fail or return undefined—it fails fast with actionable error messages. The TypeScript definitions are precise, and the library correctly handles edge cases like padding in base64 and checksums in bech32.

From a security perspective, this is exactly what you want: minimal attack surface, no transitive dependencies to audit, constant-time operations where appropriate, and clear error boundaries that don't leak sensitive information. The library follows secure-by-default principles—no legacy modes or unsafe shortcuts.

This is one of those rare libraries that just works exactly as advertised. Zero dependencies means no supply chain surprises, and the entire bundle is tiny (under 10KB). The API is dead simple - import what you need, encode/decode, done. No configuration objects, no connection pools to manage, because it's pure algorithmic transformation with no I/O.

Performance is excellent for a pure JS implementation. We use it heavily for base58 operations in a high-throughput service and it handles millions of ops/day without breaking a sweat. Memory usage is predictable and scales linearly with input size. Error handling is straightforward: invalid input throws with clear messages, no silent corruption. The library is synchronous by design, which is perfect for encoding operations - no async overhead.

The 2.0 release did introduce breaking changes (renamed exports, removed some compat functions), but the migration was painless with clear documentation. For production use, pin your version and test before upgrading. The codebase is audited and the author is responsive to security concerns, which matters when you're dealing with cryptographic primitives.

This library does exactly what it promises with zero friction. The API is incredibly intuitive - just import the encoding you need (base64, base58, etc.) and call encode/decode methods. I was converting wallet addresses and encoding binary data within minutes of adding it to my project. The TypeScript definitions are perfect, catching errors at compile time when you pass the wrong type.

What really stands out is the consistency across all encoding formats. Once you learn one (like base64.encode(uint8array)), you know them all. Error messages are clear and specific - if you pass a string instead of Uint8Array, it tells you exactly what went wrong. The zero-dependency approach means no supply chain bloat, which is crucial for security-sensitive encoding operations.

Documentation is minimal but sufficient. The README covers all methods with concise examples. I did wish for more real-world cookbook recipes (like handling padding edge cases in base64), but the straightforward API meant I rarely needed to consult docs after initial setup. GitHub issues get timely responses from the maintainer, who clearly understands the security implications of encoding libraries.