Convert YAML to C# online, free. YAML is an indentation-based superset of JSON favoured for human-edited config. C# classes model data for .NET with System.Text.Json support. YAML to C# conversion parses your YAML against the YAML 1.2.2 grammar (https://yaml.org/spec/1.2.2/), builds an in-memory model of its keys, nested objects and arrays, then emits ready-to-use C# types with System.Text.Json attributes following the C# language reference conventions. Processing runs in your browser in JavaScript with no upload or server round-trip — no size limit beyond your device's memory, so multi-megabyte documents convert in milliseconds and sensitive payloads never leave your machine. Typical uses include .NET APIs, desktop apps and Azure functions.
It maps the full structure of your YAML onto idiomatic C# types, following the C# language reference conventions. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Paste YAML and generate C# types from C# immediately. Conversion runs client-side, so there is no upload wait and large documents stay fast.
Nested YAML objects, tables and arrays are mapped faithfully onto C#, including nested types and optional fields.
Your YAML never leaves your device — everything is processed locally in JavaScript, with nothing logged or stored.
Unlimited conversions with no account, no quotas, and no watermark. Works on desktop and mobile.
A YAML document and its C# equivalent:
YAML input:
label: web
replicas: 3
exposed: falseOutput:
public class Service
{
public string Label { get; set; }
public int Replicas { get; set; }
public bool Exposed { get; set; }
}Paste your YAML into the editor and press "Convert to C#". The tool parses it against the YAML 1.2.2 grammar, then generates C# types following C# language reference conventions — instantly and entirely in your browser. You can validate or format the YAML first to be sure it is clean.
YAML anchors and aliases are expanded and comments are dropped before C# is produced, and indentation defines the structure. Note that YAML 1.1 treats words like "yes" and "no" as booleans, so quote them if you want strings.
Optional or nullable members in the generated C# are inferred from keys missing in some records of your YAML, following C# language reference. Include the optional fields in your sample so they are typed correctly.
YAML (YAML Ain't Markup Language) (YAML) — YAML is an indentation-based superset of JSON favoured for human-edited config. C# classes (C#) — C# classes model data for .NET with System.Text.Json support. This converter maps the structure of your YAML onto C# so you can use it for .NET APIs.
Yes. Invalid YAML is flagged with a clear error before anything is converted. Common YAML problems to check are spaces (never tabs) for indentation, consistent indent levels, and no duplicate keys. Starting from clean input keeps the generated C# accurate.
Yes. The entire YAML-to-C# conversion runs locally in your browser in JavaScript — your YAML is never uploaded, logged or stored. That matters when the data is something like Kubernetes & Docker Compose manifests, which should not leave your machine.
The generated C# is ready for .NET APIs, desktop apps and Azure functions. Copy or download it and drop it straight into your codebase.
We use cookies for analytics and personalized ads to help keep these tools free. Until you accept, ads stay non-personalized and analytics cookies are off. See our Privacy Policy.