Validate JSON and CSV import data via webhook with configurable rules

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1. Workflow Overview

How it works Send a POST request with a JSON array of records and your validation rules. The workflow checks every field in every row and returns a structured report showing valid/invalid rows with...

Best for

Document Extraction automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.webhook, n8n-nodes-base.set, n8n-nodes-base.code, n8n-nodes-base.respondtowebhook

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Florian Eiche.

Original n8n.io source

1.1 Workflow description

Title: Validate JSON and CSV import data via webhook with configurable rules
Workflow name: Validate JSON and CSV import data via webhook with configurable rules

How it works

Send a POST request with a JSON array of records and your validation rules. The workflow checks every field in every row and returns a structured report showing valid/invalid rows with specific error messages.

Supported rules: required, type (string, number, email, date, url, boolean), min/max, minLength/maxLength, regex, enum, and dateFormat (YYYY-MM-DD, DD.MM.YYYY, MM/DD/YYYY).

The response includes a summary (total, valid, and invalid row counts) plus a detailed error list with row number, field name, failed rule, and error message.

Set up steps

Import the workflow and activate it
Send a POST request to the webhook URL with "data" (array of objects) and "rules" (validation config)
Optionally edit the Set Default Rules node to define fallback rules — these are used when no rules are sent in the request

No external services or API keys required. Works on self-hosted and cloud n8n instances.

Who is this for

Operations teams, data engineers, and anyone importing data into ERP systems, CRMs, or databases who needs to catch errors before bad data enters the system.

How to customize

Edit the Set Default Rules node for your standard field definitions. Rules sent in the request body override the defaults, so one endpoint works for multiple data structures. Extend the Code node for custom checks like cross-field validation.

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 3 - Sticky Note2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 4 - Sticky Note3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 5 - Sticky Note4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - Receive Data

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 7 - Set Default Rules

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 8 - Validate Data

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 9 - Respond with Report

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1.5

3. Summary Table

Workflow	Validate JSON and CSV import data via webhook with configurable rules
Complexity	intermediate
Nodes	9
Categories	Document Extraction
Author	Florian Eiche
Published	11 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/13999/13999.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Document Extraction workflows

Frequently asked questions

What does Validate JSON and CSV import data via webhook with configurable rules do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Document Extraction use case.

Florian Eiche

4 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.webhook n8n-nodes-base.set n8n-nodes-base.code n8n-nodes-base.respondtowebhook

Complexity

intermediate

Published 11 Mar 2026

Likes 0

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Install path: /data/workflows/13999/13999.json

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Validate JSON and CSV import data via webhook with configurable rules

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works

Set up steps

Who is this for

How to customize

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Sticky Note

Block 2 - Sticky Note1

Block 3 - Sticky Note2

Block 4 - Sticky Note3

Block 5 - Sticky Note4

Block 6 - Receive Data

Block 7 - Set Default Rules

Block 8 - Validate Data

Block 9 - Respond with Report

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions