Filling in an existing form
Many official documents come as fillable PDFs: job applications, school enrollment sheets, visa and permit applications, tax and insurance forms. This tool lets you complete them without printing anything. It works with text fields, checkboxes, radio options and dropdown lists that are already built into the file.
Type your answers, check what applies and download the result. The data goes into the real form fields, so whoever receives the PDF can read it in any viewer, and the organization's own systems can often pick it up too.
Creating new fields
Some PDFs look like forms but have no fields at all: they are just lines and boxes on a page. You can add fields yourself. Choose text field, checkbox, dropdown or list, then draw a rectangle where you want it. This is useful for turning a simple sign-up sheet or checklist into something others can fill in on screen.
One limitation to know up front: the tool does not detect fields automatically. It won't scan the page and guess where the blanks are. You place each new field by hand. If you only need to write on a non-fillable page once, Edit PDF may be quicker, since you just type on top of it.
When to flatten a form
Flattening turns the fields and your answers into regular page content, so they can no longer be changed. It makes sense when you send a finished form to an employer, a university or an agency and don't want anyone to alter the answers along the way. It also helps with some printers and older viewers that don't display field values properly.
Keep an unflattened copy if you think you'll need to correct something later. Once flattened, the answers can't be edited as fields anymore.
If the form will be reviewed by a person rather than a system, flattening is usually the safer choice for the copy you send.
Your answers stay with you
Forms often contain the most personal data you have: ID numbers, addresses, dates of birth, income. Here the whole process runs in your browser. The PDF and everything you type never leave your device, and nothing is saved on our end. There's no account to create and no cap on how many forms you fill.