How to Fill Out a PDF for Free: Type Into Any PDF Form

Quick summary: To fill out an interactive PDF form for free, open it in Adobe Acrobat Reader (Windows/Mac), Preview (Mac), or Microsoft Edge (Windows) — click a field and type. For non-fillable PDFs (flat documents with no form fields), use Preview on Mac or the free Markup tool to add text boxes on top. On iPhone, open the PDF in Files and tap the markup pencil icon to add text. If the form is locked or you cannot type anywhere, see the method for flat PDFs below.

Filling out a PDF form is one of the most common PDF tasks — tax forms, job applications, contracts. The process depends on whether the PDF has interactive form fields or is a flat document that needs text overlaid on top. You can also upload any PDF to our free AI PDF reader to understand the content before filling it out.

How to fill out an interactive PDF form on Mac

Interactive PDF forms have clickable text fields, checkboxes, and dropdowns built in.

Preview (built-in, free)

1. Open the PDF in Preview.
2. Click any form field — a text cursor appears.
3. Type your response.
4. For checkboxes: click to check or uncheck.
5. For dropdowns: click to open the dropdown, select an option.
6. Save: File → Save (Cmd+S) or File → Export as PDF to save a copy.

Preview handles standard interactive PDF forms automatically — no settings to change.

Adobe Acrobat Reader (free, all platforms)

Acrobat Reader is the most reliable for complex forms with calculations, required fields, and digital signatures:

1. Download Adobe Acrobat Reader (free) and open the PDF.
2. Click any form field and type.
3. Use Tab to move to the next field.
4. Click Save (the disk icon) or File → Save when done.

Acrobat Reader also shows a purple bar at the top for forms — “Please fill out the following form.” — confirming the PDF has interactive fields.

How to fill out a PDF on Windows

Microsoft Edge (built-in, no install)

Edge is built into Windows and handles interactive PDF forms natively:

1. Right-click the PDF → “Open with” → “Microsoft Edge”.
2. Click any form field and type.
3. Press Tab to move between fields.
4. Save: click the download button in Edge’s PDF toolbar to save the filled PDF.

Google Chrome

Chrome handles interactive PDF forms the same way as Edge:

1. Drag the PDF into a Chrome tab, or open it from File → Open.
2. Click fields and type.
3. Print to save: Ctrl + P → Save as PDF.

How to fill out a non-fillable PDF (flat PDF)

A flat PDF has no form fields — it is a scanned document or a designed form without interactive elements. You need to overlay text on top.

Mac — Preview Markup

1. Open the PDF in Preview.
2. Click the Markup Toolbar button (pencil icon in the toolbar), or go to View → Show Markup Toolbar.
3. Click the Text tool (the “T” with a box).
4. Click where you want to add text — a text box appears.
5. Type your text.
6. Drag the text box to position it precisely over the form field.
7. Adjust font size if needed (Format menu or toolbar).
8. Repeat for each field.
9. File → Export as PDF to save the filled version.

Windows — Adobe Acrobat Reader (Add Text)

Acrobat Reader has a basic text overlay tool for non-fillable PDFs:

1. Open the PDF in Acrobat Reader.
2. Go to Tools in the menu bar.
3. Look for “Fill & Sign”.
4. Use the text tool to click and type anywhere on the page.
5. Save the filled PDF.

Any platform — Google Docs workaround

1. Upload to Google Drive → open with Google Docs.
2. Google converts the PDF to a Google Doc.
3. Add your text.
4. File → Download → PDF Document.

Note: the layout may shift during conversion. Best for simple, text-heavy forms rather than precisely positioned form fields.

How to fill out a PDF on iPhone

Interactive forms — Files app

1. Open the PDF in the Files app.
2. Tap a form field — the keyboard appears.
3. Type your response.
4. Tap Done when finished.

For some PDFs, tap the markup pencil icon (top right) first to enter editing mode.

Flat PDFs — Markup

1. Open the PDF in Files.
2. Tap the markup pencil icon (top right corner).
3. Tap the + button at the bottom right → “Text”.
4. A text box appears — type your content.
5. Drag the text box to position it.
6. Tap Done → Save File to save the changes.

How to save a filled PDF form

After filling out the form, save it correctly — do not just close the app:

Method	How to save
Preview (Mac)	File → Save (Cmd+S), or File → Export as PDF
Edge (Windows)	Click download icon in PDF toolbar
Chrome	Ctrl+P → Save as PDF
Acrobat Reader	File → Save, or Save As
Files (iPhone)	Tap Done → Save File

Save as PDF (not Print to Image) to keep the form fields interactive for future editing.

Frequently Asked Questions (FAQ)

Why can’t I type in the PDF form fields?

Three possible causes: (1) the PDF is a flat/scanned document with no interactive fields — use the markup/text overlay method above; (2) the form is locked or restricted by the creator — try opening in Acrobat Reader which handles more field types; (3) the PDF is a scanned image — the “fields” are just pictures, not real form elements. For scanned forms, use the text overlay method to type on top of the image.

How do I fill out a PDF and email it?

Fill out the PDF using any of the methods above, save it as a PDF file, then attach that file to your email. Do not send the PDF while it is still open in the viewer — save it first to ensure all fields are embedded.

Can I fill out a PDF form without Adobe Acrobat?

Yes. Preview (Mac), Edge (Windows), Chrome (any platform), and the Files app (iPhone) all handle interactive PDF forms for free without any install. For flat PDFs, Preview and the markup tools cover most cases.

How do I sign a PDF form after filling it out?

After filling the form, add a signature using Preview (Mac), Edge (Windows), or Acrobat Reader. See how to add a signature to a PDF for free for step-by-step instructions including typed, drawn, and image-based signatures.

Can I edit a filled PDF form later?

If you saved with form fields intact (not printed to a flat PDF), yes — reopen the file and modify the field values. If you saved it as a flat PDF (via Print to PDF), the text is baked in as an image and cannot be edited as a form field anymore.

What’s the difference between a fillable and non-fillable PDF?

A fillable PDF has interactive form elements (text fields, checkboxes, dropdowns) created by the PDF author. A non-fillable (flat) PDF is a static image or design with no built-in form functionality — you have to overlay text manually using markup tools.

Related guides

• How to make a PDF fillable for free — create your own interactive PDF form
• How to add a signature to a PDF for free — sign after filling out
• How to edit a PDF for free — make broader changes to PDF content
• How to annotate a PDF for free — add comments and highlights alongside form responses
• How to type on a PDF for free — add text anywhere on a PDF page