Crates / Category
Rust crates · category · data Oct 24, 2026
Parser implementations crates by real downloads
crates.io describes this category as: “Parsers implemented for particular formats or languages.” Below are the 15 crates in it among the 300 most-downloaded crates, ranked by real downloads (quiet-day baseline) instead of raw count.
Short answerBy steady daily use, syn leads Parser implementations with 8,378,886 real downloads a day (foundational and steady). 8 of the 15 have 1,000+ dependents; 0 have shipped nothing in 2+ years. Release spikes barely matter here: the median crate got 1.5% of its downloads within 2 days of a release.
15 crates
| Compare | ||||||
|---|---|---|---|---|---|---|
| synFoundational | 8,378,886 | 18,848 | 12d | +5% | 2.8B | |
| serde_jsonFoundational | 4,294,696 | 113,141 | 13d | -5% | 1.5B | |
| shlexEstablished | 3,284,146 | 754 | 5mo | +5% | 98M | |
| toml_datetimePulled in | 3,215,444 | 29 | 16d | +0% | 936M | |
| tomlFoundational | 2,960,881 | 20,777 | 15d | +2% | 1B | |
| toml_editWidely used | 2,715,071 | 1,989 | 15d | +1% | 941M | |
| uuidFoundational | 2,553,829 | 22,614 | 1d | -1% | 913M | |
| urlFoundational | 2,520,673 | 16,906 | 10mo | +0% | 986M | |
| timeWidely used | 2,434,189 | 6,747 | 3mo | -2% | 1B | |
| serde_spannedPulled in | 2,255,941 | 16 | 16d | +2% | 678M | |
| httparseEstablished | 2,183,298 | 609 | 20mo | +3% | 82M | |
| const-oidEstablished | 2,079,241 | 160 | 10mo | +13% | 56M | |
| quick-xmlWidely used | 1,525,182 | 2,687 | 2mo | +10% | 493M | |
| derEstablished | 1,514,408 | 378 | 49d | +6% | 528M | |
| gimliEstablished | 1,195,625 | 206 | 4mo | -8% | 611M |
Click a column to sort; press + to add a crate to a comparison. Real / day = median downloads on days with no release that day or the day before. Each crate's page shows its verdict and the 4 rules behind it. Why this method · this category on crates.io