Form Validation

Ensure data quality with Flow Forms' comprehensive validation system. Set rules, provide helpful error messages, and guide users to submit accurate information.

Built-in Validation

Field Type Validation

Each field type includes automatic validation:

Email - Validates email format
Date - Ensures valid dates
File Upload - Checks file types and sizes
Numeric Fields - Validates number formats

Required Fields

Mark any field as required:

Toggle the "Required" switch in field settings
Users cannot submit until all required fields are complete
Clear indicators show which fields are mandatory

Input Rules & Masking

Input Masking

Format data automatically as users type:

Phone numbers: (xxx) xxx-xxxx
Social Security: xxx-xx-xxxx
Postal codes: xxxxx-xxxx
Custom patterns for your specific needs

Validation Rules

Validation rules ensure data meets your requirements before submission. Common rules include:

Minimum/maximum length
Specific formats or patterns
Numeric ranges
Date ranges

Custom Validation

Pattern Matching

Use regular expressions for complex validation:

Custom ID formats
Specific text patterns
Advanced email validation

Cross-Field Validation

Validate fields in relation to each other:

End date must be after start date
Confirmation fields must match
Sum of fields must equal total

Error Messages

Default Messages

Flow Forms provides clear, user-friendly error messages for all standard validations.

Custom Messages

Customize error messages to:

Provide specific instructions
Match your organization's tone
Guide users to correct input

Best Practices

Validate on the server side for security
Provide immediate feedback when possible
Use clear, helpful error messages
Don't over-validate - only require what's necessary
Test validation with edge cases