---
title: "Pre-Filling a Form"
description: "How to pre-fill form columns"
url: https://help.stackby.com/en/articles/149-pre-filling-a-form
collection: "Advanced Form Features"
updated: 2025-10-01
language: en
---

# Pre-Filling a Form

How to pre-fill form columns

Forms are super simple in Stackby. 

You can create both [custom forms](https://help.stackby.com/en/articles/139-guide-to-creating-forms.md) and [updatable forms](https://help.stackby.com/en/articles/140-guide-to-creating-updatable-forms.md), in minutes. 

You can prefill the form URL to prefill specific columns in the form. 

Just find the form URL and use the following syntax after the form URL 

```javascript
?prefill_{ColumnName}=CellValue 
```

You first start with a ? after the form URL, then add

```javascript
prefill_ 
```

then reference the column name **prefill\_**{Reference the column name}

**Note:** Always reference column name in a curly bracket 

and then use the **equal to** = to add exact information 

```javascript
?prefill_{FirstName}=Jon
```

If you need to prefill more columns, just use **ampersand &**

```javascript
?prefill_{FirstName}=Jon&prefill_{LastName}=Snow
```

If you need to **add space** in between either column names or column information, use **%20**

```javascript
prefill_{First%20Name}=Jon%20Snow
```

**Here's a video on how you can do it:**

![](https://d258lu9myqkejp.cloudfront.net/attachment_images/ff2f66ad3cc2e6d3d638e3602fac23f1d19455a908f2d9d289fcfb37da3718cfPrefill-forms-min.gif)