Form Field Validation

Build a custom online form with field validation to prevent invalid submissions. Jotform offers several methods for validating fields and setting form rules, so you can always ensure that people fill out your form correctly.

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Прикупи податке који су ти потребни и увери се да корисници правилно попуњавају твоје обрасце. Учини одређена поља обрасца обавезним, подеси ограничења поља, верификуј имејл адресе, додај услове или виџете и подеси проверу у шаблону, на серверу или на страни клијента.

Set Up Field Validation

Prevent incomplete or incorrect form submissions by automatically validating form fields. Jotform offers several validation methods to ensure that you collect valid data from everyone who fills out your form.

Require form fields

Make sure you get the data you need by requiring specific fields on your form. Prevent form submission if these form fields are unfilled.

Validate data format

Ensure that phone numbers, email addresses, and other types of data are formatted correctly with pattern-match validation.

Verify forms after submission

Check form submissions with server-side validation. After users press the submit button, notify them if they’ve missed anything on your form.

Notify form users in real time

Encourage form completion with client-side validation. Alert users immediately when they’ve missed or incorrectly completed a form field so they can quickly correct their mistakes.

Require fields based on conditions

Set up conditional logic to require users to fill out a specific form field based on their answers to previous questions.

Verify email addresses

Validate email addresses entered in your form with our Email Validator widget or Submission Verifier.

Set Form Field Limits

Validate form fields by setting rules. Limit checkbox selections, dates, file attachments, and more.

Limit checkboxes

Limit the number of selections for a checkbox field in your form. Set a minimum or maximum number of checkboxes users can select, and display an error message if users select too few or too many.

Restrict date range

Limit which dates can be selected using our Date Picker field. You can disable specific days, set a custom date range, let users select past or future dates, and even enable age verification.

Change accepted file types and sizes

Set file type and size limits for your file upload form field. Add or remove file types and file size limits.

Require unique field values

Prevent duplicate submissions by requiring unique values or limiting entries for the email, short text, dropdown, and number fields.

Do more with verification widgets

Validate submissions and set other field limits with Jotform’s 20+ free verification widgets. Add a CAPTCHA, get e-signatures, verify addresses, send confirmation codes, and much more.

Field Validation for Forms

Learn more about the different types of form validation and how to set it up properly to ensure your form submissions are complete.

Field Validation for Forms