Crate

base64

Base64 encoding and decoding for Rust.

What it is

base64 provides standard and URL-safe base64 encoding and decoding with configurable padding. It supports the standard RFC 4648 alphabet, the URL-safe alphabet, and padding or no-padding variants via named engine types.

Why it is commonly used

Encoding binary data for text protocols — HTTP Authorization headers, data URIs, email attachments, JWT tokens, and any API that transmits binary payloads as ASCII text.

1.8k
Repositories
92%
Actively maintained
1.6k
Updated ≤ 30 days
5.0M
Total stars
1.5k
Owners

Counted from the Cargo.toml manifests of the 1.8k indexed repositories that declare base64 as a dependency — not download counts. Dependency data last verified 2026-08-13.

Browse 1756 repositories using base64 in Repos →
Often used with

Crates that show up unusually often in base64 projects. The most distinctive pairings rank first — crates these projects use far more than the average indexed Rust project does, not just crates that are popular everywhere. Each percentage is the share of base64 projects that also use it.

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