How to fill out a PDF form without printing it

To fill out a PDF form, drop it into Fill PDF Form: the tool lists every field in the document, you type your answers, tick the boxes, and download the completed PDF. This works when the PDF contains real form fields — which most official and business forms do.

The quick way

1. Open Fill PDF Form and drop the PDF.
2. The tool shows the fields it found: text boxes, checkboxes and drop-down lists. Fill them in.
3. Tick Flatten after filling if you're sending the final version (see below).
4. Click Save filled PDF and download it.

The form is filled in your browser. Neither the document nor your answers are uploaded.

Should you flatten the form?

A filled PDF normally keeps its fields editable: anyone who opens it can change your answers, and some viewers — especially on phones or in email previews — don't display field contents reliably.

Flattening turns the fields and their values into ordinary page content. After that:

• the answers can no longer be edited;
• they look the same in every PDF reader.

Flatten the copy you send, but keep an unflattened copy for yourself in case you need to correct something later. If you forgot to tick the option, you can flatten afterwards with Flatten PDF.

Then sign it

Many forms end with a signature line. Fill and flatten first, then add your signature with Sign PDF — you can draw it or type your name, and place it where it belongs. The full method is in how to sign a PDF.

What if the PDF has no fields?

Some PDFs look like forms but aren't: they're a scan of a paper form, or a document exported without interactive fields. If the tool says it found no fillable fields, there is simply nothing to fill — the lines and boxes are just drawings on the page.

Your options, in order of preference:

1. Ask the sender for the fillable version. Administrations and companies often have one; the scan is sometimes just the version that got forwarded.
2. Look for an online version of the same form on the organisation's website.
3. Print, fill by hand and scan, if that's accepted.

Sign PDF can place a signature or a typed name on a flat PDF, but it is not a general text editor: it won't let you type answers into every box of a scanned form.

Common problems

Some fields can't be changed. The form's author locked them — they're shown but read-only. That's intentional.

Text is cut off in a box. Some fields have a character limit or a fixed size. Shorten the answer or use common abbreviations.

The form says it uses XFA. XFA is an Adobe-specific form technology that browsers can't fill. Open that file in Adobe Acrobat Reader instead.

My answers disappeared when I opened the file elsewhere. The viewer may not display form fields well. Flatten the file so the answers become part of the page.

The form can't be read at all. It may be password-protected or damaged. If it's protected, you need the password or an unprotected copy from the sender.

Before you send it

Filled forms often contain personal details: address, date of birth, account or ID numbers. If you send the file by email, consider protecting it with a password and sharing the password another way — by phone or text message, not in the same email. See how to password-protect a PDF for details.

Limits worth knowing

• Only real form fields can be filled; flat or scanned PDFs have nothing to fill.
• XFA forms aren't supported in the browser.
• Flattening is permanent on the flattened copy — keep the original if you may need to edit.