Lib.rs

› Encoding
#default #tree #ser-json

no-std nanoserde

Serialization library with zero dependencies. Supports Binary, JSON, RON and TOML

by Fedor Logachev, knickish and 23 contributors

36 releases

new 0.2.1 Mar 22, 2025
0.2.0-beta.0 Jul 28, 2024
0.1.37 Jan 25, 2024
0.1.35 Sep 1, 2023
0.1.18 Jul 20, 2020

#131 in Encoding

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32,612 downloads per month
Used in 52 crates (35 directly)

MIT/Apache

120KB
3.5K SLoC

nanoserde

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Fork of https://crates.io/crates/makepad-tinyserde with all the dependencies removed. No more syn, proc_macro2 or quote in the build tree!

> cargo tree
nanoserde v0.2.0 (/../nanoserde)
└── nanoserde-derive v0.2.0 (/../nanoserde/derive)

Example:

use nanoserde::{DeJson, SerJson};

#[derive(Clone, Debug, Default, DeJson, SerJson)]
pub struct Property {
    pub name: String,
    #[nserde(default)]
    pub value: String,
    #[nserde(rename = "type")]
    pub ty: String,
}

For more examples take a look at tests

Features support matrix:

Feature json bin ron toml
serialization yes yes yes no
deserialization yes yes yes no
container: Struct yes yes yes no
container: Tuple Struct no yes yes no
container: Enum yes yes yes no
field: std::collections::HashMap yes yes yes no
field: std::vec::Vec yes yes yes no
field: Option yes yes yes no
field: i*/f*/String/T: De*/Ser* yes yes yes no
field attribute: #[nserde(default)] yes no yes no
field attribute: #[nserde(rename = "")] yes yes yes no
field attribute: #[nserde(proxy = "")] no yes no no
field attribute: #[nserde(serialize_none_as_null)] yes no no no
container attribute: #[nserde(default)] yes no yes no
container attribute: #[nserde(default = "")] yes no yes no
container attribute: #[nserde(default_with = "")] yes no yes no
container attribute: #[nserde(skip)] (implies default) yes no yes no
container attribute: #[nserde(serialize_none_as_null)] yes no no no
container attribute: #[nserde(rename = "")] yes yes yes no
container attribute: #[nserde(proxy = "")] yes yes no no
container attribute: #[nserde(transparent)] yes no no no
container attribute: #[nserde(crate = "")] yes yes yes no

Crate features:

All features are enabled by default. To enable only specific formats, import nanoserde using

nanoserde = { version = "*", default-features = false, features = ["std", "{format feature name}"] }

in your Cargo.toml and add one or more of the following crate features:

Format Feature Name
Binary binary
JSON json
RON ron
TOML toml

Dependencies