Format Data - Free Online Tool

Format phone numbers, emails, dates with predefined or custom formatting options

Upload Excel File

Drop Excel file here or click to browse

Support for .xlsx, .xls files (Max 10MB)

How to Use Format Data - Free Online Tool

I'll show you how to standardize and format phone numbers, email addresses, and dates in your Excel files using predefined patterns and custom formatting rules.

Step 1: Upload Your Excel File

Upload the Excel file containing data that needs formatting. The tool works with .xlsx and .xls files up to 10MB.

Step 2: Select Data Type to Format

Choose what type of data you want to format:

  • Phone Numbers: Standardize phone number formats
  • Email Addresses: Clean and validate email formats
  • Dates: Convert and standardize date formats
  • Mixed Data: Auto-detect and format multiple data types

Step 3: Configure Formatting Options

For Phone Numbers:

  • Choose target format: (123) 456-7890, 123-456-7890, +1 123 456 7890
  • Set country code handling
  • Remove or standardize extensions

For Email Addresses:

  • Convert to lowercase
  • Remove extra spaces
  • Validate email format
  • Flag invalid emails

For Dates:

  • Source format detection
  • Target format selection (MM/DD/YYYY, DD-MM-YYYY, etc.)
  • Handle ambiguous dates

Step 4: Select Columns to Process

Specify which columns contain the data to format:

  • Enter column letters (A, B, C) or ranges (A:C)
  • Use auto-detection to identify data types
  • Preview data before processing

Step 5: Process and Download

Click "Format Data" to apply formatting rules. The tool will show you a summary of changes made.

Advanced Features:

  • Custom formatting patterns
  • Batch processing multiple columns
  • Error reporting for invalid data
  • Backup of original values

Frequently Asked Questions

Yes! The tool recognizes various international formats and can standardize them. You can specify country codes and choose from multiple international formatting patterns. It handles extensions and country prefixes intelligently.

Invalid emails are flagged but not removed. The tool will clean what it can (remove spaces, fix case) and mark clearly invalid formats. You'll get a report showing which emails couldn't be properly formatted.

The tool analyzes your date data to identify the most likely format pattern. It looks for separators, number patterns, and common date structures. You can override auto-detection if needed or specify the source format manually.

Yes! Beyond the predefined patterns, you can create custom formats using pattern syntax. For example, you can specify exactly how you want phone numbers formatted or create unique date formats for your needs.

No, the tool creates a new formatted file while preserving your original. Many formatting options also keep the original values in adjacent columns for reference, so you can always revert if needed.

The tool handles mixed formats well. It analyzes each cell individually and applies the appropriate formatting. You'll get a report showing which formats were detected and how many of each type were processed.