MarquoFill Out a PDF Form Online
Open a PDF form, type into its fields right on the page, tick the boxes, add your signature and download a flattened PDF. Free and private: the form never leaves your device.
- field types: text, check box, radio, list
- 4
- fields in Form W-9, tested
- 23
- fields in Form W-4 2026, tested
- 48
- files uploaded
- 0
The PDF and your signature are processed in your browser and are not uploaded anywhere.
This places an image of your signature: a simple electronic signature, not a certified digital signature.
Your signature
Sign here with a finger, mouse or stylus
- Type into text fields on the page
- Tick check boxes and radio buttons, pick from lists
- Add a signature, date and text anywhere
- Latin, Spanish and Cyrillic letters
- Flatten the filled form
How It Works
Open the form
Choose the PDF. Its fields appear as light boxes on the page, in the places the form's author made them.
Fill and sign
Tap a box to type, tick the check boxes, then add your signature and the date with the buttons above the pages.
Download
Create the PDF and download it. Flatten is on by default, so the answers can no longer be changed.
Forms Tested on This Page
| Form | Revision | Fields | Pages with fields |
|---|---|---|---|
| W-9 | March 2024 | 23 | 1 |
| W-4 | 2026 | 48 | 1, 3, 4 |
PDFs downloaded from irs.gov on October 30, 2026; fields counted in the files themselves.
Forms With Fields and Forms Without
A PDF made for filling has fields: boxes that any PDF reader lets you type into. This page shows them on the page and writes your answers into those fields. Text with Spanish or Cyrillic letters is written with an embedded font, so it shows the same on every computer.
Many forms are scans or plain PDFs without fields. On those, use Text and Date to put your answers anywhere on the page, and drag them onto the lines.
This Page or the App
| This page | Marquo app | |
|---|---|---|
| Fields | Typed by hand | Saved details filled in |
| Signature | Kept until you close the tab | Saved on the iPhone, can be locked with Face ID |
| Documents | PDF, Word, DOC, RTF and photos of paper | |
| Price | Free | 1 signed document a day free, Pro for more |
Marquo 1.0 for iPhone and this page, October 2026.
Questions
Why can't I type into my PDF
It has no form fields. Use Text and Date to type anywhere on the page.
Is my form uploaded
No. The form is filled in your browser, and the new PDF is made on your device.
What does Flatten do
It turns fields and marks into part of the page, so nobody can change the answers or move the signature.
Can I fill it in later
Download it with Flatten off. The fields keep your answers and can be changed in any PDF reader.
Official Forms
Sign the next document on your phone
Open the file from Mail, Messages or Files, add your signature and send back a flattened PDF. Everything stays on your iPhone.
iPhone, iOS 26 or later. 1 signed document a day free. Pro from $4.99 a week.