Rust crate alternatives · data Oct 24, 2026
Alternatives to heck
Short answerThe closest alternatives to heck on crates.io data are convert_case (1.7M real downloads a day), simdutf8 (965K real downloads a day), Inflector (222K real downloads a day). Of the 8 we list, the most used is unicode-ident, and 5 shipped a release in the last year. heck itself gets 3,901,922 a day with 1,865 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs heck | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| convert_case Widely used | 1,687,092 | 0.43x | 1,213 | 58d | keyword "case", keyword "string" | side by side |
| simdutf8 Established | 965,252 | 0.25x | 220 | 2.1y | category No standard library, keyword "string", keyword "unicode" | compare |
| Inflector Established | 222,363 | 0.06x | 366 | 7.8y | keyword "camel", keyword "snake" | side by side |
| unicode-ident Established | 4,390,154 | 1.13x | 222 | 12d | category No standard library, keyword "unicode" | compare |
| aho-corasick Established | 3,331,047 | 0.85x | 655 | 3mo | keyword "string" | compare |
| strsim Established | 2,956,166 | 0.76x | 733 | 2.6y | keyword "string" | compare |
| writeable Pulled in | 2,575,145 | 0.66x | 61 | 2mo | keyword "string" | compare |
| tinystr Pulled in | 2,524,670 | 0.65x | 57 | 2d | keyword "string" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with heck; read its description before you swap.
- More dependents means more answered questions and a smaller chance it disappears.
- Check the last release against how fast you need fixes. For heck: is it still maintained?
Rules
Alternatives = tracked crates (top 1000 by downloads) that share a specific crates.io category (2 points each) or keyword (3 points each) with heck, most similar first; its own parts (same name prefix) and crates it depends on or that depend on it are left out, because those are companions, not substitutes. Real downloads = quiet-day median, crates.io data Oct 24, 2026. Built when we find 3 or more.
Up next
The closest alternative: Widely used and steady. 1,687,092 real downloads a day.convert_caseRust crate. Convert strings into any case. Real use: 1.7M downloads a day on quiet days; 1,213 crates depend on it.Read it next →Also worth your time