How to choose the right prefill type

Choosing the right prefill type

Zoho Forms offers multiple options to prefill fields in your forms, ensuring a seamless experience for users by auto-populating known data.
The 3 primary prefill types are:

They all serve different purposes.

Field Alias Prefill  

Field alias prefill uses unique identifiers (aliases) for each field in the form. You can generate prefilled URLs by appending parameters to the form's URL. This method is simple and works best for static or straightforward data scenarios.

When to use  

  1. When you have predefined data that does not change dynamically.
  2. Ideal for scenarios where the data you want to prefill is manageable and does not require real-time updates.
  3. When you plan to share prefilled form links with a limited audience, such as through email or messages.
For example, you are hosting a company workshop for employees. To save their time, you create a prefilled registration form with basic details.
  1. Name: John Sam
  2. Department: Marketing

When John clicks the link, his name and department are already filled in. All he has to do is confirm and submit.

Static Prefill URLs 

The Static Prefill URLs option improves upon Field Alias Prefill by allowing users to create, save, and manage multiple prefilled URLs efficiently.

Why use Static Prefill URLs?
  1. No need for field aliases: Directly map fields to prefill values.
  2. Save prefilled URLs: Unlike Field Alias Prefill, generated URLs can be stored and reused.
  3. Shorter and cleaner URLs: Prefilled values are not exposed in the URL.
  4. Easily update prefilled data: Modify field mappings without generating a new URL.


Prefill-Webhook

Prefill-Webhook uses a webhook to fetch data from external applications in real-time. This type of prefill is ideal for dynamic or frequently updated data. This is available as a field and is managed in the builder. 

When to use  

  1. When the data to prefill comes from an external system and changes with each form respondent.
  2. Perfect for tailoring forms for individual users with up-to-date information.
  3. When the data involves multiple variables, such as fetching details based on a user ID or order number.
  4. When you want to automate the prefill process without manually generating URLs.
For example, your sales team uses a CRM tool to track leads. You are sending a review form to potential clients, but you want their name, email, and phone number prefilled directly from the CRM.

   

 

Field Alias Prefill

Static Prefill URLs

Prefill-Webhook 

Ease of setup

Simple and manual

Simple, with saved URLs

Requires API/webhook integration

Scalability

Limited to small data sets

Medium – manageable for repeated use

Handles large and complex data sets

Use-cases

Customer review forms, internal team registration forms

Event registration, frequently used prefilled forms

CRM integration, personalized forms

Automation

Manual URL generation

Saved and reusable URLs

Fully automated

Technical Knowledge

Minimal

Minimal

Requires API and webhook knowledge

    Managed from
            Form settings page
             Form settings page
         Builder page as a field

Choosing the right prefill type depends on your prefill requirements. Field Alias Prefill is great for quick, simple setups, while Prefill-Webhook offers automated solutions for personalized forms. Whether you are handling a small event or managing data collection at scale, Zoho Forms has you covered.