# v2.1.0

Released on 2017-01-28.

Feature release. All changes are backward-compatible.

- Adds conversions from and to [arbitrary user-defined types](../../features/arbitrary_types.md) via
  `to_json`/`from_json`, the [`meta`](../../api/basic_json/meta.md) function, and the option to switch off
  exceptions ([`JSON_NOEXCEPTION`](../../api/macros/json_noexception.md)).

[Full release notes](https://github.com/nlohmann/json/releases/tag/v2.1.0).

## API changes

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