In many integration projects, especially when working with Azure Integration Services, we often deal with JSON messages. Although the Logic App Designer can generate a JSON schema from a JSON payload, we often need the opposite. In practice, we need to generate a sample JSON message from a JSON Schema to test Logic Apps workflows and Data Mapper maps.
Unfortunately, Logic Apps and the new Data Mapper do not provide an out‑of‑the‑box way to generate dummy messages.
Because of this, during demos and training sessions, I frequently lose track of the expected input message for a specific map. As a result, I often spend unnecessary time searching for that information.
To solve this problem, we usually rely on free online tools, such as the Liquid Technologies schema‑to‑JSON converter. However, these tools store data in their log files. For this reason, they can raise privacy and security concerns in enterprise environments.
Therefore, together with my team, I decided to create free tools with the source code available on GitHub. This approach avoids data‑privacy risks while still making testing faster and easier.
📝 One-Minute Brief
Testing integrations often requires realistic sample payloads. This article introduces a free Windows tool that generates a sample JSON document from a JSON Schema, helping developers quickly test Logic Apps and Data Mapper solutions without using online converters.
Create a sample JSON document from a JSON Schema Tool
Create a sample JSON document using the JSON Schema Tool is a straightforward Windows tool that allows you to create a JSON Document based on the JSON Schema we provide.
No data is stored in log files.

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Credits
- Luis Rigueira | Member of my team and one of the people responsible for developing this tool.