Fill PDF forms
Open a fillable PDF, type your answers, and download it filled in. Lock the answers so they print the same everywhere, or leave the fields editable. Your form never leaves this device.
Drop a fillable PDF here, or click to choose
Your file stays on this device. Nothing is uploaded.
How to fill in a PDF form
- Press “Choose a PDF file”, or drop the fillable PDF onto the box above.
- Fill in the fields, which are grouped by page. Click one to see where it sits on the page.
- Leave “Lock the answers in” ticked so the answers cannot be changed later, or untick it to keep the form editable.
- Press “Fill & download”.
What Fill PDF forms does
Filling in a PDF that was built to be filled in (an application, a claim, a tax or visa form) by typing into its own fields rather than printing it, writing on it and scanning it back.
What it does
- Finds the form's fields and lists them page by page, with a preview so you can see which is which
- Handles text boxes, tick boxes, radio groups and dropdowns, and keeps any answers the form arrived with
- Optionally locks the answers into the page, so they print identically everywhere and cannot be edited afterwards
- Says up front when a form is one it cannot fill, instead of returning a file that looks done and is not
What it does not do
- Add fields to a PDF that has none. Make a PDF fillable does that, including on a scan
- Fill XFA forms, Adobe's XML format, which need Acrobat Reader; these are detected and refused rather than half-filled
- Write characters the form's own font cannot draw, which rules out most non-Latin scripts and is reported per field
- Change fields the form marks read-only, or sign a signature field; that is Sign PDF
Last updated
Need to send this to someone?
Our sister site QRSansar hosts a document and gives you a short link and a QR code for it. That is handy for WhatsApp, a slide, a poster or a printed handout, and it avoids attachment size limits entirely. You can swap the file later and the link and QR code keep working.
Worth being clear about the difference: that is a hosting service, so your file is uploaded to it. Everything on PDFsansar stays on your device; sharing is the one job that cannot.
Share a document on QRSansar →Other tools
All free, and all run in this tab without uploading anything.
Fill PDF forms: common questions
Why does it say there is no form in my PDF?
Because there is not one. A fillable PDF has real form fields built into it: click one in Acrobat or your browser and a cursor appears. A form that was designed in Word, printed and scanned looks identical to a person and has nothing to type into. If that is what you have, use Sign PDF: it puts an image anywhere on the page, and a typed name saved as a PNG works as well as a signature.
What is an XFA form, and why can this not fill one?
XFA is Adobe's XML form format. The fields are described in an XML layer rather than in the PDF itself, and only Adobe Acrobat and one or two other readers can draw them, which is why an XFA form often opens as a single grey page saying “please use Adobe Reader”. Filling one properly means implementing an Adobe form runtime, which is not something that belongs in a browser tab. So we detect it and say so, rather than handing you a file that looks filled here and arrives blank. Adobe Acrobat Reader is free and reads them correctly.
Should I lock the answers in?
Usually yes, if you are sending the form to somebody. Locking draws your answers into the page itself, so they look the same in every reader and cannot be edited or accidentally cleared. Leave it off if you are filling in a draft, or if the person receiving it needs to add their own answers. Either way, keep the blank original: locking is one-way and there is no undo.
Can I fill in a form in a language that does not use Latin letters?
Not reliably, and the tool will tell you rather than fail quietly. A form field carries its own font, and on almost every real form that font covers Latin characters only. Typing Devanagari, Arabic or Chinese into one produces an empty box in the finished PDF, so we check before writing and name the characters that will not work. Accented Latin (é, ü, ñ, ç) is fine.
Some fields are greyed out. Why can I not fill those?
They are marked read-only by whoever made the form: a reference number, a total that a calculation fills in, a box for the office to complete. They are listed so you can see nothing is missing, but they are the form author's decision and changing them would be editing the form rather than filling it.
Is my form uploaded to check it for fields?
No. The form is read, filled and saved entirely in this tab, the same as every other tool here. That matters more on this page than most: a form is exactly the sort of document with your name, address, date of birth and bank details on it.