JSON to Rust Serde

Generate Rust structs or a Root alias with Serde serialization and deserialization. Shortened unique field names preserve original keys through serde rename attributes or explicit map lookups for long keys; mixed arrays and null use serde_json::Value.

Input

Output

Loading tool module...

About this json to rust serde

JSON to Rust Serde — browser-based utility.

How this tool works

Paste one complete JSON value or load the sample.
Run locally to generate code, then copy the complete result.
Compile or validate the code in your target project and review inferred types before use.

Worked example

Scenario: Rust Serde: Generate a model for the displayed object and retain every original property.

Sample input:

{"id":1,"name":"Ada"}

Processing: Infer each value, emit the target declarations, then validate the original object using the target compiler or library.

Illustrative output:

use serde::{Serialize, Deserialize}; #[derive(Debug, Serialize, Deserialize)] #[serde(deny_unknown_fields)] pub struct Root { #[serde(rename = "id")] pub id: i64, #[serde(rename = "name")] pub name: String, }

Limits and verification

Accepts JSON text up to 1,000,000 UTF-16 code units and 100 nesting levels; output is limited to 8,388,608 code units. Invalid syntax, duplicate keys, invalid Unicode, unsafe integer values, overflow, underflow and decimal precision loss are rejected. Quote exact large numbers as strings. Dates remain strings. Inference describes the supplied sample, not every possible API response. Enable serde’s derive feature and add serde_json. Deserialize into Root with serde_json::from_str. Integer tokens use i64; decimal or exponent tokens use f64. Empty arrays, mixed arrays and null use generic JSON values where needed, so those positions are not constrained to the sample shape. Structs reject unknown fields. JSON keys longer than 512 UTF-16 code units use explicit typed Serialize and Deserialize implementations to avoid excessive compiler memory.

Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.

Browser processing boundary

Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.

Relevant references

These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.

Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology

How to use it

Paste one complete JSON value or load the sample.
Run locally to generate code, then copy the complete result.
Compile or validate the code in your target project and review inferred types before use.

Frequently asked questions

What Rust Serde code is generated for id, name, and active?+

The browser emits a Root struct with `#[derive(Debug, Serialize, Deserialize)]`, `#[serde(deny_unknown_fields)]`, and renamed public fields: id is i64, name is String, and active is bool.

How does the Rust generator keep original JSON property names?+

Each emitted field receives `#[serde(rename = "...")]`. Rust identifiers are made safe while deserialization still expects the original JSON property spelling.

Does generated Rust define the whole data contract?+

No. Types are inferred from the supplied JSON sample. A heterogeneous or later-added field can need a different representation, so compile and review generated code with real contract cases.

Does JSON to Rust Serde compile Cargo or upload my sample?+

It emits Rust source text in the browser; it does not invoke Cargo, run a compiler, or send the JSON to a code-generation API. Ordinary page-resource requests are separate.