Decision Workspace
json5 vs json-five vs ion-rs
Side-by-side comparison of Rust crates
55
json5
growingv1.3.1
A Rust JSON5 serializer and deserializer which speaks Serde.
54
json-five
growingv0.3.1
JSON5 parser with round-trip capabilities and compatible with the serde data model
70
ion-rs
stablev1.0.0
Implementation of Amazon Ion
Core Metrics
| json5 | json-five | ion-rs | |
|---|---|---|---|
| Health Score | 55 | 54 | 70 |
| Total Downloads | 67.1M | 724.3K | 656.9K |
| 30d Downloads | 2.6M | 72.9K | 16.9K |
| Dependents | 4.9K | 62 | 232 |
| Releases | 20 | 8 | 35 |
| Last Updated | 156d ago | 186d ago | 20d ago |
| Age | 7y 11m | 1y 5m | 5y 11m |
Health Breakdown
json5
Maintenance
9
Quality
16
Community
12
Popularity
8
Documentation
10
json-five
Maintenance
10
Quality
16
Community
11
Popularity
7
Documentation
10
ion-rs
Maintenance
17
Quality
17
Community
17
Popularity
7
Documentation
12
Technical Details
| json5 | json-five | ion-rs | |
|---|---|---|---|
| Version | 1.3.1 | 0.3.1 | 1.0.0 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✓ Yes |
| License | MIT | MIT | Apache-2.0 |
| Dependencies | 9 | 7 | 31 |
| Crate Size | 78KB | 49KB | 676KB |
| Features | 0 | 3 | 9 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2021 |
| MSRV | — | — | 1.82 |
| Owners | 1 | 1 | 3 (team) |
Links
Quick Verdict
- •ion-rs leads with a health score of 70/100, but none of the options score above 80.
- •json5 has the most downloads (67.1M), suggesting wider adoption.
- •json5 is depended on by 4.9K crates — strongest ecosystem trust.
- •json-five is pre-1.0 — API may change.