Make sure users enter clean, correct information (required fields, length limits, number ranges, and formats).
Overview
Validation rules help you collect correct and usable information. Without validation, you may get incomplete phone numbers, empty email addresses, or budgets that don’t make sense — which creates extra follow-up work for your team.
With validation, you can gently guide users to enter the right format before they submit. This improves the quality of leads, applications, and support requests.
Example: On a “Job Application” form, you can require an email and set a minimum length for “Full Name”. On a “Request a Quote” form, you can keep the budget within an expected range so your sales team gets consistent data.
How It Works
Each field can be required. Text fields can have minimum/maximum length. Number fields can have minimum/maximum value. You can also apply a “pattern” rule (a format rule) to check entries.
Step-by-Step Guid
- Open the form field you want to control.
- Turn on Required for must-have questions.
- Set Minimum Length / Maximum Length for text.
- Set Minimum Value / Maximum Value for numbers.
- If needed, set a Format Rule (Pattern) to enforce a specific structure.
- Test by entering incorrect values in Preview (it should block submission).
Fields Table
| Label | Description | Example |
|---|---|---|
Required |
On |
|
Minimum length |
Minimum number of characters (text fields). |
3 |
Maximum length |
Maximum number of characters (text fields). |
120 |
Minimum value |
Minimum value (number fields). |
100 |
Maximum value |
Maximum value (number fields). |
10000 |
Format pattern |
Format rule for text fields. |
Only digits allowed |
Fields explanation
Required
Makes the field mandatory (cannot submit without it)
Minimum length
Minimum characters allowed (for text)
Maximum length
Maximum characters allowed (for text)
Minimum value
Minimum number allowed (for number fields)
Maximum value
Maximum number allowed (for number fields)
Format pattern
A format rule to check how the text is written
Tips
- Use validation to reduce follow-up work (“Please re-enter your phone number”).
- Don’t over-restrict. If rules are too strict, users may abandon the form.
- Explain expectations using placeholder and help text.
Common Mistakes
- Setting a minimum length higher than maximum length.
- Setting a minimum value higher than maximum value.
- Using a strict format rule without telling users what the format is.
