How to create a custom form URL with a prepopulated field?

Basically, I have a list of users with name and email, I need to send the form to them but with a custom link per user and prepopulated the fields of name and email, is just not to make them repeat that info and potentially make mistakes on that part

Hello Francisco,

Thanks for reaching out to Jotform Support. I suggest using the Prepopulating Form Fields via URL Parameters. You can prepopulate your form fields by including the query strings in the URL. But we already have a tool available that you can use to generate a URL easily. Let me show you how to do it:

1. Open the Field Prepopulator.
2. Click the Populate Fields at the bottom.
3. On the pop-up window, select Allow.
4. On the Form Picker catalog, select your chosen form.
5. Click on Continue after.
6. Now enter your form user details and click on Generate URL at the top once done.
7. There you have the unique URL for your form responders.
8. Here's the result.

You might also want to check out this guide about How to Prefill Form Fields With Data You Provide with Manual Prefill.

Give it a try and let us know if you need any help.