What this tool does
- Detects every field — text boxes, checkboxes, radio groups and dropdowns, listed with their names and page numbers
- Fill in the browser — a clean form on the left, the live page preview on the right
- Save filled or flattened — keep the fields editable for the next person, or flatten them into fixed page content so nobody can change your answers
- Required-field check — fields the document marks as required are flagged before you export
- No field names? No problem — the tool tells you plainly if the PDF is a flat scan rather than a real form
Filled vs flattened
Saving filled keeps the AcroForm fields in place with your values in them, so the recipient can correct a typo — the right choice for an internal draft. Saving flattened converts the appearance of each field into ordinary page content and deletes the field, which is what you want before sending a completed form on: the values become part of the page, cannot be edited in a reader, and will render identically everywhere, including in readers that handle forms badly.
Why fill forms here
- Complete a tax, visa, HR or insurance form without buying a PDF editor
- Fill in a form on a machine where you cannot install software
- Keep a form with personal or financial details off third-party servers
- Flatten a completed form so the recipient cannot alter it
Frequently asked questions
Are my PDFs or answers uploaded anywhere?
No — the form is parsed and filled in your browser. Nothing you type is sent to a server, which matters when the form asks for an ID or bank details.
The tool says there are no fields — why?
The PDF is not an interactive form; it is a printed page or a scan with lines on it. Use Sign PDF to type text anywhere on the page instead.
Will my entries show up in every PDF reader?
If you flatten, yes — guaranteed, because the values become page content. If you save filled, readers that ignore field appearance streams can occasionally render them differently.
Can I fill a form that also needs a signature?
Fill it here, download it, then open the result in Sign PDF to add the signature.
Are dropdowns and radio buttons supported?
Yes — dropdowns offer the document's own option list, and radio groups let you pick one of the defined choices.