BurntSushi/bstr

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1110 stars · 76 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

bstr is a Rust crate providing a byte string type and extension traits for &[u8] and Vec<u8> that are not required to be valid UTF-8. It offers Unicode-aware operations like substring search, case conversion, grapheme iteration, and line-oriented I/O helpers that tolerate invalid UTF-8.

Use cases

• process byte data that may not be valid UTF-8 in Rust
• search for substrings in binary or mixed-encoding data
• iterate over lines of stdin without UTF-8 validation
• count Unicode words in byte streams
• convert byte text to uppercase while passing invalid UTF-8 through
• extract grapheme clusters from possibly-invalid UTF-8 text

When to choose

• you need string-like operations on bytes that may be partially or fully invalid UTF-8
• you want Unicode-aware substring search and grapheme handling on byte slices
• you are writing CLI tools or parsers that must handle arbitrary input bytes

When to avoid

• your data is guaranteed valid UTF-8 and std's str/String suffices
• you need a general-purpose binary serialization format rather than string handling

Facets

library · maturity stable

parser serialization developer-tools programming-languages developer-tools rust cross-platform byte-strings utf-8 unicode substring-search graphemes no-std-friendly natural-language-processing

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