What is a Data Validator?

A data validator is an essential tool for ensuring the accuracy, consistency, and quality of your datasets. Whether you are working with customer email lists, product inventories in CSV format, or complex JSON data structures, our online data validator helps you identify errors instantly. By applying specific rules—such as checking for valid email formats, ensuring numbers fall within a range, or detecting duplicate entries—you can clean your data before importing it into your database or CRM.

Why Use an Online Data Validator?

Dirty data can lead to failed marketing campaigns, broken applications, and inaccurate analytics. Using this free tool allows you to:

• Save Time: Automate the checking process instead of manually reviewing thousands of rows.
• Improve Accuracy: Catch subtle errors like trailing spaces, invalid date formats, or malformed URLs.
• Secure Processing: All validation happens right in your browser. Your sensitive data is never uploaded to our servers.
• Format Flexibility: Works seamlessly with CSV, TSV, JSON, and plain text lists.

How to Use This Data Validator Tool

1. Upload or Paste Data: Drag and drop your file (CSV, JSON, etc.) or paste raw text into the input area.
2. Define Rules: Select a column and choose a validation rule (e.g., "Email Format" or "Required"). You can add multiple rules to different columns.
3. Validate: Click the "Validate Data" button. The tool will process every row and highlight any errors in red.
4. Export: Download the clean data as a new CSV or JSON file, or export the error report to fix the issues later.

Key Features of This Free Data Validator

• Client-Side Processing: Fast and secure; data never leaves your device.
• Multiple Formats: Supports CSV, TSV, JSON, and line-separated values.
• Custom Rules: Validate emails, URLs, numbers, dates, and regex patterns.
• Visual Feedback: Color-coded tables make it easy to spot invalid cells.
• Export Options: Download only valid rows or keep the errors for review.

FAQ