Fill PDF Form Online

Fill out any interactive PDF form directly in your browser, with no uploads and no sign-up. This free PDF form filler loads your fillable PDF, automatically detects every text field and checkbox, and shows a matching input for each so you can type your answers and tick boxes. When you are done, apply your changes and download a completed PDF — with an option to flatten the form so the values become permanent. Because everything runs 100% in your browser, your document is processed locally and never leaves your device.

🔒 100% private — files never leave your device

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How to use

  1. Drop your interactive PDF form into the box, or click to select a .pdf file from your device.
  2. The tool detects the form's text fields and checkboxes and displays an input for each one.
  3. Type your text answers and tick the checkboxes you need; optionally turn on Flatten to lock in the values.
  4. Click Apply and download your completed, filled-in PDF — everything stays in your browser.

Frequently asked questions

Is my PDF uploaded to a server?

No. This form filler runs 100% in your browser. Your PDF is opened and edited locally on your device, and nothing is ever uploaded to a server, so your data stays completely private.

What kind of PDF forms can I fill?

It works with interactive PDF forms (AcroForm) that contain real fillable fields. The tool reads text fields and checkboxes and creates an input for each. Scanned or flat PDFs without interactive fields cannot be filled.

Does it support dropdowns, radio buttons, or signatures?

Only text fields and checkboxes are supported. Other field types like dropdowns, radio buttons, and option lists are safely skipped, and the tool does not add digital or e-signatures.

What does the Flatten option do?

Flattening merges your entered values into the page so the form is no longer editable. The text and checkbox states become permanent, which is useful when you want to share a final, non-editable PDF.

Why does it say no fields were found?

That means your PDF has no interactive form fields to fill. It may be a scanned image or a flattened PDF. In that case there are no text fields or checkboxes for the tool to detect.

Is there a file size limit?

There is no fixed limit set by the tool. Since the PDF is processed in your browser using your device's memory, very large or complex forms may load more slowly on older or low-memory devices.

About this tool

Fill a PDF form online free. Detects text fields and checkboxes, enter values, and save a completed PDF (optionally flattened). 100% in your browser, no uploads.

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