--- title: How can I add pre-filled values to my registration form? description: When you already know some of the answers before your users come to your registration form, you can fill those answers in for them before their arrival (or pre-fill them) --- [Skip to content](https://kb.bigmarker.com/knowledge/how-can-i-add-pre-filled-values-to-my-registration-form#main-content) English Show submenu for translations [![Size=36px, Style=On-light, Brand=BigMarker-1](https://kb.bigmarker.com/hs-fs/hubfs/Size=36px%2c%20Style=On-light%2c%20Brand=BigMarker-1.png?width=171&height=36&name=Size=36px%2c%20Style=On-light%2c%20Brand=BigMarker-1.png)](https://www.bigmarker.com/) Open main navigation Close main navigation - English Show submenu for translations Welcome to the BigMarker Knowledge Base! - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://kb.bigmarker.com/knowledge?hsLang=en) 2. [Webinars and Series](https://kb.bigmarker.com/knowledge/webinars-and-series?hsLang=en) 3. [Registration](https://kb.bigmarker.com/knowledge/webinars-and-series?hsLang=en#registration) # How can I add pre-filled values to my registration form? ## When you already know some of the answers before your users come to your registration form, you can fill those answers in for them before their arrival (or pre-fill them) Using a specifically formatted URL for your landing page, you can pre-fill custom registration fields for specific people. Whether you want to make a VIP registrant have a seamless experience, or you are using your CRM to send one-click registration emails to your whole list of prospective attendees, the format will stay the same  ### How can I pre-populate the name and email fields on my BigMarker registration form? You can pre-populate name and email fields in your BigMarker registration form by adding the following URL parameter to the end of your event’s registration link: `?first_name={value}&last_name={value}&email={value}` Then substitute your registrant’s first name, last name, full name and email address into the where we see "value." This ensures that your registrant’s own name and email will appear when they click the registration button: https://www.bigmarker.com/sample/sample?first\_name=john&last\_name=doe&email=john.doe@vector.com ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-May-07-2025-04-03-24-5326-PM.png?width=525&height=477&name=image-png-May-07-2025-04-03-24-5326-PM.png) ### How can I pre-populate custom registration fields on my BigMarker registration form? **Note:** You can also pre-fill your registration widget. Following the steps below, you will need to copy and paste the custom registration field's bolded URL parameter into the registration widget's embed code You not only can pre-fill basic registration fields, but also your custom registration fields. From the [Session Admin](https://kb.bigmarker.com/knowledge/introducing-the-new-session-admin?hsLang=en), click on **Share Link** found in the **Dashboard**. ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Feb-05-2026-03-22-37-9372-PM.png?width=600&height=162&name=image-png-Feb-05-2026-03-22-37-9372-PM.png) In the new popup, you'll see an option to create custom links. When you do so, you'll choose which registration field you want to pre-fill, then give it a value of your choosing. You can add as many fields as you like with these links. ![](https://kb.bigmarker.com/hs-fs/hubfs/image-png-Jun-29-2026-07-05-47-4701-PM.png?width=450&height=435&name=image-png-Jun-29-2026-07-05-47-4701-PM.png) Once saved, simply copy the link and share it with your registrants. ### Uses for pre-filling forms With these concepts you can unlock even more potential with your registration fields. Consider using [one click registration](https://kb.bigmarker.com/knowledge/enabling-one-click-registration?hsLang=en) links to truly speed up your registration. With this enabled, as long as you include name and email address into these pre-filled fields, immediately after clicking on a pre-filled link, that person is registered. Additionally, pre-filling values is essentially the same idea as using [UTM codes](https://kb.bigmarker.com/knowledge/how-to-add-utm-codes-to-your-webinars-1?hsLang=en). 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