Validate JSON Strings via Webhook API
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Easily validate any JSON string by sending it to a dedicated webhook endpoint. This n8n workflow provides a simple, external API to check if a string is valid JSON, returning a clear `true` or `false` status along with error details if parsing fails.
About This Workflow
This n8n workflow empowers you to create a robust, accessible JSON string validation service. By exposing a public webhook, you can send any string to be instantly checked for JSON validity. Ideal for ensuring data integrity across various systems, the workflow processes incoming POST requests, attempts to parse the provided jsonString, and responds with a valid status. If the string is invalid, it includes a helpful error message explaining the parsing failure. This eliminates the need for complex server-side logic in your applications, offering a reliable external utility with minimal setup.
Key Features
- Dedicated Webhook Endpoint: Receive JSON strings for validation via a custom URL.
- Real-time Validation: Instantly check if an incoming string adheres to JSON syntax.
- Clear Response: Get a
valid: trueorvalid: falsestatus in the webhook response. - Detailed Error Messages: Receive specific error information when a string is invalid, aiding in debugging.
- Easy Integration: Seamlessly integrate JSON validation into any application or system capable of making HTTP POST requests.
How To Use
- Activate the Workflow: Ensure the workflow is active in your n8n instance to enable the webhook listener.
- Get the Webhook URL: In the "Webhook: Receive JSON String" node, open its settings and copy the production webhook URL (e.g.,
https://your-n8n-instance.com/webhook/validate-json-string). - Send JSON String: Make an HTTP POST request to the copied URL. The request body must be a JSON object containing a
jsonStringproperty, e.g.,{"jsonString": "{\"data\": 123}"}. - Receive Validation Result: The webhook will respond with a JSON object containing the validation result, such as
{"valid": true}or{"valid": false, "error": "Unexpected token 'd' at position 1"}.
Apps Used
Workflow JSON
{
"id": "c9e3d097-4fd6-4fb8-9c3c-8f70559d9709",
"name": "Validate JSON Strings via Webhook API",
"nodes": 16,
"category": "DevOps",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
Get This Workflow
ID: c9e3d097-4fd6...
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