Crates / Compare / heck vs Inflector
Rust crates side by side · data Oct 24, 2026
heck vs Inflector
Short answerBy steady daily use, heck is bigger: 3,901,922 real downloads a day against 222,363 for Inflector (17.5x). 1,865 crates depend on heck and 366 on Inflector. heck last shipped 2.6 years ago, Inflector 7.8 years ago.
heck
Widely usedWidely used and quiet for years.
1,865 crates depend on it; no release in the last 90 days, so its count is all steady use.
heck is a case conversion library.
Inflector
EstablishedEstablished and quiet for years.
366 crates depend on it; no release in the last 90 days, so its count is all steady use.
Adds String based inflections for Rust. Snake, kebab, camel, sentence, class, title and table cases as well as ordinalize, deordinalize, demodulize, foreign key, and pluralize/singularize are supported as both traits and pure functions acting on String types.
heckInflector · 100% = that crate's normal quiet day, so a spike to 300% is triple its usual traffic
Every number, side by side
| Same window, same method | heck | Inflector |
|---|---|---|
| Real downloads a day | 3,901,922 | 222,363 |
| Crates that depend on it | 1,865 | 366 |
| Last release | 0.5.0, 2.6 years ago | 0.11.4, 7.8 years ago |
| Trend vs the field | -4% | +2% |
| Release-window share | 0.0% | 0.0% |
| Downloads in the window | 336,400,089 | 19,451,024 |
| All-time downloads | 1,452,205,164 | 122,708,895 |
| Versions published | 11 | 27 |
| License | MIT OR Apache-2.0 | BSD-2-Clause |
| MSRV | 1.56 | not set |
| First published | Mar 27, 2017 | Oct 10, 2015 |
Which to pick
- Downloads tell you what is common, not what fits. Each crate's own description above says what it is for; when the jobs differ, pick by the job.
- When both fit, prefer the one more crates depend on (heck, 1,865 dependents): more eyes, more answered questions, and you may already have it in your tree.
- Check the release dates against your own pace: heck 2.6 years ago, Inflector 7.8 years ago.
Also in this space
Method
Real downloads = the median day with no release that day or the day before, from the crates.io API (Jul 27, 2026 to Oct 23, 2026). Raw crates.io counts include CI and bots and run high (why); the method is from our 90-day study.
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