Text Case Conversion in Rust – Methods & Crates
Published 2026-03-05 · convertcase.in
Rust's standard library provides Unicode-safe case conversion methods. For programming naming conventions (camelCase, snake_case), the heck crate is the go-to solution.
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1Standard Library
"HELLO".to_lowercase() → "hello" "hello".to_uppercase() → "HELLO"
2heck Crate
use heck::ToSnakeCase; "myVariableName".to_snake_case() → "my_variable_name" Also: ToCamelCase, ToKebabCase, ToPascalCase
Frequently Asked Questions
What crate handles case conversion in Rust?
The heck crate is the standard choice — it handles camelCase, snake_case, kebab-case, PascalCase, and more.