The basic steps for filling a PDF form

Open the PDF file in your web browser or PDF reader — most forms work in either one. Look for text boxes, checkboxes, or dropdown menus on the form itself. Click inside a text box and type your answer. For checkboxes, click once to mark them; click again to unmark. For dropdowns, click the arrow and select from the list. When you finish, use the File menu or a Save button to keep your work.

The form may save automatically as you type, or it may require you to save manually. If you close the form without saving, your answers disappear. Some forms let you save a copy to your computer; others only let you print or email the completed version. Check whether the form has a Save button before you start — this tells you how it works.

Not every PDF is fillable. If you click on the form and nothing happens, the PDF is a scanned image or a locked document. In that case, you will need a different tool, which we cover in the section below.

Key Takeaways

  • Fillable PDFs have interactive text boxes and buttons you can click; non-fillable PDFs are images or locked and require different tools to complete.
  • Most web browsers and free PDF readers like Adobe Reader can open and fill forms, so you usually do not need to buy software.
  • Save your work frequently or check whether the form saves automatically, because closing without saving erases your answers.
  • If a form does not let you type or click, try opening it in a different program — sometimes a form works in one reader but not another.

Opening the form in the right program

Start by opening the PDF file. If you have Adobe Reader installed, right-click the file, select "Open with," and choose Adobe Reader. If you do not have it, use your web browser instead — Chrome, Firefox, Safari, and Edge all have built-in PDF readers. Drag the file into your browser window or use File > Open to load it.

Adobe Reader is free and handles most forms without trouble. If the form does not work in your browser, read Adobe Reader from adobe.com and try again. Some forms are designed specifically for Adobe Reader and will not fill properly in a browser. If you already have Adobe Reader and the form still will not let you type, the form may be locked or not fillable at all.

Filling in text boxes and fields

Click inside any text box on the form. Your cursor will appear and you can type. Use Tab on your keyboard to move to the next field — this is faster than clicking each box. Use Shift+Tab to go backward if you make a mistake. Some forms let you use the arrow keys to move between fields; others do not.

If a field has a character limit, you will see a number like "50 characters" near the box. Stop typing when you reach that limit. If you paste text from another document, the form may reject it if it is too long. Type directly into the form instead of copying and pasting when possible.

Some fields are required and marked with an asterisk (*) or a red border. You must fill these before you can save or submit. If you try to save and the form refuses, look for a red outline or error message — this shows which field you missed.

Selecting checkboxes and dropdown menus

Checkboxes appear as small squares. Click once to put a checkmark inside; click again to remove it. Some forms use radio buttons instead — these are small circles where you can only pick one answer from a group. Click the circle next to your choice.

Dropdown menus show a single selected option with a small arrow next to it. Click the arrow to see all choices, then click the one you want. The form will close the menu and show your selection. If you change your mind, click the arrow again and pick a different option.

Saving your completed form

Look for a Save button on the form itself, or use File > Save in your program's menu. If the form has a Save button, click it. If it does not, use Ctrl+S on Windows or Command+S on Mac. A dialog box will appear asking where to save the file and what to name it. Choose a folder you can find later, like Documents or Desktop.

Some forms only let you save once, and then they lock. Others let you save multiple times as you make changes. If you are unsure, save early and often. If the form does not save at all, it may only support printing or emailing — look for a Print or Email button instead.

After you save, close the form and open it again to make sure your answers stayed. If they disappeared, the form did not save properly. Try saving again or use a different program.

What to do if the form will not let you type

First, check whether the form is actually fillable. Click on a text box. If your cursor appears and you can type, it is fillable. If nothing happens when you click, the form is not fillable.

Non-fillable forms are usually scanned images or PDFs created from paper documents. You have two options: print the form and fill it by hand, or use a tool that lets you add text on top of the image. Free tools like PDFtk or online form editors let you type over a non-fillable PDF, though the text may not align perfectly. For official documents, printing and filling by hand is usually more reliable.

If the form is fillable but still will not let you type, try opening it in a different program. Close it in your browser and open it in Adobe Reader, or vice versa. Some forms work in one reader but not another. If it works in Adobe Reader, use that program going forward.

Printing and submitting your form

Once you have filled and saved the form, you may need to print it or send it somewhere. Look for a Print button on the form or use File > Print. Choose your printer and click Print. The form will print with all your answers filled in.

If the form asks you to email it, use File > Send or look for an Email button. Your email program will open with the form attached. Type the recipient's address, add a subject line, and send. If you do not see an Email button, save the form to your computer and attach it manually to an email.

Some forms submit directly to a website when you click Submit. These usually show a confirmation message or take you to a new page. Write down any confirmation number or reference code the form gives you — you may need it later.

Frequently Asked Questions

Why can I see the form but cannot click on anything?

The form is probably locked or not fillable. Try opening it in Adobe Reader instead of your browser, or try a different browser. If it still will not work, the form may be a scanned image. You can print it and fill it by hand, or use an online tool to add text on top of the image.

I filled the form but it will not save. What do I do?

Some forms only let you print or email, not save. Look for a Print or Email button instead of Save. If you need to keep a copy, print it to PDF using File > Print, then select "Save as PDF" instead of printing to paper. This creates a new file with your answers in it.

Can I fill a PDF form on my phone or tablet?

Yes, but it depends on the app. Adobe Reader works on phones and tablets and handles most forms. Your phone's built-in PDF reader may also work. Open the form, tap the text boxes to type, and look for a Save or Submit button. Saving works the same way as on a computer.

What if I make a mistake after I save the form?

Open the saved file again, click on the field with the mistake, and correct it. Type over the wrong text or delete it and type the right answer. Save again when you finish. If the form locked after your first save and will not let you edit, you may need to start over with a fresh copy of the original form.

Can I fill a PDF form offline, or do I need the internet?

You can fill most forms offline once you have downloaded the file. Open it in Adobe Reader or your browser and work normally. You only need the internet if the form submits to a website or if you need to email it. Saving to your computer works without internet.