How to fill in a PDF for free
Add answers, ticks and a signature to a PDF, including forms with boxes that cannot be clicked.
Read the guideAdd checkmarks to a PDF online for free
Check boxes or add crosses to your PDF, then adjust their size and position.
Use this tool for free as often as you need. The document is processed on your device so its contents remain under your control.
or drop the file herePDF · Up to 50 MB per file
How it works
- Open the PDF you need to complete.
- Place a checkmark in the relevant box.
- Check its alignment and export.
What you can do
- Add checks and crosses
- Move and resize every mark
- Add text or a signature in the same session
See the tool in action
Try the example
Fictional documents: three practice pages and an appendix, with no personal data.
Page 2: place a check mark inside the empty box. Resize it without covering the nearby label.
What does this PDF tool do?
The Check tool is active after the document opens. Draw the mark, adjust its size, then continue with the remaining boxes without leaving the file.
Document processing happens in your browser. SunPDF does not upload your PDF to a server for editing. Closing or refreshing the tab ends the current session.
When to use this tool
Add a check or cross to complete a checklist and the boxes of a non-interactive document visually.
How to check the result
Match every mark to its label, inspect its size and alignment, and review any empty boxes before sending the file.
Guides for this tool
Follow the steps and checks to make before saving your document.