Can Webflow forms be pre-filled with information?

Yes, Webflow forms can be pre-filled with information by using URL query parameters or custom JavaScript methods. This is useful for enhancing user experience, personalization, or tracking form submissions.

1. Pre-Fill Using URL Parameters

• You can pass data to form fields using URL query parameters (e.g., ?name=John&email=john@example.com).
• In Webflow, use Custom Code to detect these parameters and insert them into form fields.
• Add the script inside the Page Settings > Before tag area.
• The script looks for specific parameters and sets the value of corresponding form inputs using their id or name attribute.

Example use-case:

• Link: https://yourdomain.com/landing?first=John&email=john@example.com
• You assign id="first" and id="email" to the relevant form inputs to match.

2. Pre-Fill Using JavaScript Variables

• If you're storing dynamic information in the browser (e.g., from a CMS item or user session), you can pre-fill form fields using custom JavaScript.
• Place the script in the Custom Code section or inside an Embed element on the page.
• This method allows full control, including setting value attributes and triggering any automated logic on input change.

3. Using Webflow CMS to Pre-Fill

• You can bind form input value fields to CMS collection fields using dynamic embeds.
• For example, on a CMS template page, you can use an HTML Embed and pass a CMS field as the default value for an input.
• Format: <input type="text" value="{{cmsField}}" id="field-id">

4. Limitations and Requirements

• Webflow does not natively support form pre-filling — manual code is required for URL or JavaScript-based solutions.
• Input elements must have unique id or name attributes for the script to target them.
• Always test on your published site or a hosted preview, as custom code does not run in the Webflow Designer preview.

Summary

Webflow forms can be pre-filled using URL query parameters, JavaScript, or CMS bindings. However, all methods require manual setup via custom code or embeds, as Webflow does not offer native pre-fill functionality.