Hidden fields

Hidden fields can be used to include data that you already have in your form URL and pass it on to your form. They will help you to personalize your respondent's form experience or give you better insights into your results.
✔️ Tag the traffic source of your respondent (social media, triggers on your website, or other)
✔️ Pass on information about your respondent to your responses (like name or email address)
✔️ Mention information in your form like the name of your respondent using answer piping
✔️ Prefill input fields on your form
✔️ Pass on UTM parameters
Hidden fields are available for free to all Tally users

Create a hidden field

Type /hidden to insert a Hidden field block.
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Add the hidden fields you want to pass on to your form. You can add as many hidden field blocks as you like. If you want to add the name and the traffic source of your respondent, add 2 hidden fields block and name them for example 'name' and 'ref'.
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Finish your form and Publish it. Find your URL in the share tab.
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When you share the form, add the parameters and corresponding values to your URL.
The first hidden field should be preceded by ? . When adding multiple fields, separate them with & . For example: https://tally.so/r/nPdDxn?name=marie&ref=email
There are 2 ways to do this:
  • Manually: add the variable to your URL before sharing your form
  • Automated: use any CRM system (such as Salesforce) or email automation tool (such as Mailchimp or ActiveCampaign) to populate your data, so your respondents automatically receive a customized URL with the correct data.

Hidden field in form results

You will find the hidden fields and corresponding answers in the Responses tab, when someone submits your form.
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Mention a hidden field

Read more about how to mention hidden fields in your form using answer piping. You can also add hidden fields to your redirect URL to pass information from one form to another.

Hidden fields in an embedded form