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serde_with

v3.18.0 Stable

Custom de/serialization functions for Rust's serde

MIT OR Apache-2.0 Edition 2021 MSRV 1.88
EncodingNo standard libraryNo standard library::No dynamic allocation #serialization#utilities#serde#deserialization

Quick Verdict

  • โœ“Actively maintained (updated 14d ago)
  • โœ“Stable API (3.x for 8+ years)
  • โœ“Massive adoption (34.0K crates depend on it)
  • !Heavy dependency tree (35 direct deps)
  • โœ“Permissive license (MIT OR Apache-2.0)

Security

Checking security advisories...
Downloads
227.8M
Dependents
34.0K
Releases
72
Size
200KB

Deep Insights

๐Ÿ“ˆ
Strong growth momentum

18.3M downloads in the last 30 days (608.8K/day), up 21% from the previous period.

๐Ÿ›๏ธ
Foundational crate

34.0K crates depend on serde_with โ€” it's part of the Rust ecosystem's core infrastructure. Removing it from your dependency tree would be extremely difficult.

โš ๏ธ
Single maintainer risk

serde_with has only 1 owner despite 34.0K dependents. This is a bus-factor concern โ€” consider the implications for long-term support.

โœ…
Stable for 8+ years

The API has been stable (1.x) for over 8 years with 72 releases. This level of maturity means you can depend on it without worrying about breaking changes.

๐Ÿ“ฆ
Heavy dependency tree

35 direct dependencies. Consider the impact on compile times and supply chain complexity.

๐ŸŒŸ
Used by top crates

Notable dependents include rand_distr, serde_qs, bollard-stubs, utoipa-gen, elasticsearch. When high-quality crates choose serde_with, it's a strong quality signal.

Health Breakdown

Maintenance 18/25

Recency, release consistency, active ratio

Quality 19/25

Yanked ratio, deps, size, maturity, features

Community 15/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 15/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
492K/day avg+61%
0200K400K600K800K12/291/162/32/213/113/28

Top Dependents

Version Adoption

v1.14.0
30%
v3.12.0
25%
v2.3.3
17%
v3.14.0
15%
v3.11.0
12%

Release Timeline

72 releasessince 2017
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2017
1
2018
6
2019
5
2020
6
2021
14
2022
8
2023
10
2024
13
2025
7
2026
2
Less
More

Feature Flags

default =["std", "macros"]

hexstd*jsonallocguidebase64chronomacros*indexmaptime_0_3chrono_0_4indexmap_1indexmap_2schemars_1smallvec_1schemars_0_8schemars_0_9hashbrown_0_14hashbrown_0_15hashbrown_0_16

README

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Maintainers

Dependencies
35
direct dependencies
Dependents
34.0K
crates depend on serde_with

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