How to fill out a PDF form without Adobe
Acrobat is not required to fill in a form. What actually determines your options is a property of the file itself — and you can check it in about five seconds.
Disclosure: we make AddToPDF, one of the tools below. The first method here uses software Apple already gave you, and for a great many forms it is all you need.
The five-second test
Open the PDF and click where an answer is supposed to go.
- A cursor appears. Interactive form. The document has real fields. Easy case.
- No cursor, but you can select text on the page. Flat digital PDF. No fields; you place answers on top.
- No cursor and nothing selects — dragging just draws a box. A scan. A photograph of a page.
Every recommendation below follows from which of those three you have. Most frustration with PDF forms is the result of using a method built for case one on a document that is actually case two or three.
Case 1 — Interactive form
On a Mac: Preview, free
- Double-click the PDF to open it in Preview.
- Click the first field and type. Tab moves to the next field.
- Click checkboxes to tick them; use dropdowns where present.
- Cmd+S to save.
Preview's AutoFill will complete name and address fields for you, which is a real saving on repetitive government and rental forms. Preview is free, already installed, and for interactive forms it is usually the fastest thing available. If it works, stop here.
On an iPhone or iPad
Apple's Markup can add text, but it does not recognise interactive form fields — you end up drawing text boxes on top of fields designed to be typed into, which on a phone is slow. An app that detects the fields and gives you a keyboard for each is a genuine improvement here rather than a marketing claim. Ours does that; so do PDF Expert and the free PDFgear.
Case 2 and 3 — Flat PDFs and scans
No fields exist, so every tool does the same fundamental thing: places new text over the page. What differs is how much fighting is involved.
Preview's Markup tools (free)
Choose Tools › Annotate › Text to place a text box, then drag it into position and restyle it. It works. It is also tedious, because each box appears in the middle of the page in a large red font, so every single answer needs dragging and restyling. Fine for three fields; wearing for twenty.
A free third-party editor
PDFgear is free and handles this more gracefully than Preview, and it also does OCR if you need the scan's own words to become selectable.
A dedicated editor
What you are paying for is precision and repetition: click exactly where the answer goes, type, and have the font stay as you set it. AddToPDF works that way on Mac, iPhone and iPad from a single one-time purchase, detects real form fields when they exist, and never sends your document anywhere. It does not do OCR and it cannot edit the form's printed text — if you need either, use one of the fuller editors in our comparison guide.
When the checkboxes are not clickable
They are printed graphics, not fields. Place a text character — an X or a ✓ — over the box, or a small filled shape. Match the size of the box and it reads as intended.
AddToPDF — the app we make
A deliberately small PDF editor for Mac, iPhone and iPad: add text, sign, fill forms, organise pages. Fully offline, no account, one-time purchase covering all three devices. It does not edit existing body text or do OCR.
Download on the App StoreA word about the free web tools
Search for this and the first page of results is browser-based services that will fill your form in a tab without installing anything. They work, and for a public document there is nothing wrong with them.
Be deliberate, though, about what a form usually contains: a name, an address, a date of birth, a signature, sometimes a bank account or a medical detail. Browser-based tools upload the document to a server to process it. That is a decision about where your personal data goes, and in some professions it is a decision your regulator has views on. Anything that processes locally — Preview, PDFgear's desktop app, ours, the desktop versions of the paid editors — sidesteps it.
Before you send it back
- Reopen the saved file. Confirm every answer is still there.
- Open it somewhere else too — a browser is a good test. If values vanish, the form was filled but not flattened; save a flattened copy so the answers become part of the page and look identical everywhere.
- Check the signature is the right size. A signature scaled to a third of the page is the most common tell that a form was filled on a phone in a hurry.
Frequently asked questions
How do I fill out a PDF form without Adobe Acrobat?
If the form has interactive fields, Apple's Preview on a Mac fills them for free, and so do free tools such as PDFgear. If it is a flat scan with no fields, you place text on top of it instead, which Preview's Markup tools, PDFgear or a dedicated editor can all do. Acrobat is only genuinely required if you need to create form fields, run OCR, or satisfy a compliance requirement.
How can I tell if a PDF is a real form or just a scan?
Open it and click where an answer should go. If a cursor appears, it has interactive fields. If not, try selecting text on the page with your mouse: if text highlights, it is a flat digital PDF; if nothing highlights and you just draw a box, it is a scanned image.
Can I fill out a PDF form on my iPhone?
Yes. Apple's Markup can add text to a PDF on iOS, though positioning boxes precisely with a finger is awkward and Markup does not recognise interactive form fields. An app that detects the fields and gives you a keyboard for each one is considerably faster on a phone.
Why do my form entries disappear when I send the PDF to someone else?
Usually because the form was filled but not flattened, and the recipient opened it in a viewer that does not render form field values — browser PDF viewers are common culprits. Saving a flattened copy, where the values become part of the page, makes the document look the same everywhere.
Are the checkboxes on my PDF form not clickable?
If clicking does nothing, the checkboxes are printed graphics rather than real form fields, which means the document is a flat PDF or a scan. Place a text character such as an X on top of the box, or use a small filled shape.
Is it safe to fill out a PDF form on a website?
Browser-based PDF tools upload your document to their servers to process it. For a public document that is unimportant; for a form containing a signature, a bank account, a passport number or medical details, it means handing personal data to a third party. Software that processes the file on your own device avoids the question entirely.
Related guides
How to add text to a PDF on a Mac
Why Preview often can't, and the free routes that work.
Read the guide ›How to sign a PDF on iPhone or iPad
Three ways to sign on iOS, and how to send it straight back.
Read the guide ›Mac PDF editors: an honest comparison
Eight tools, what each is genuinely best at — including where ours loses.
Read the comparison ›