Fill In PDF Form Fields Online Free
Upload a fillable PDF, fill in its form fields, and download the completed file.
How to Fill In a PDF Form in 3 Steps
- Upload your PDF form. Drag and drop or browse for the PDF that contains fillable form fields. The tool detects all interactive fields — text inputs, checkboxes, dropdowns, and radio buttons — automatically.
- Fill in the form fields. The form fields detected in your PDF are displayed for you to fill in. Enter the required information for each field. Only the fields present in the original PDF are shown.
- Download your completed form. Click to save your completed form and download the filled PDF. The form values are embedded in the document, ready to submit, print, or send.
Why Use PDFTools to Fill PDF Form?
- Automatic field detection — PDFTools automatically detects and lists all fillable fields in your PDF — text inputs, checkboxes, dropdown menus, and radio buttons — so you know exactly what needs to be completed.
- Supports standard AcroForm fields — Works with standard PDF AcroForm interactive fields as used in government forms, tax documents, applications, and professional forms created with Adobe Acrobat, PDF24, and similar tools.
- No PDF reader plugin needed — Fill in PDF forms directly in your browser without needing Adobe Acrobat, browser PDF plugins, or any other software installed.
- Combine with Flatten for final submission — After filling, use the Flatten PDF tool to permanently lock the form values before submitting or archiving the completed document.
Frequently Asked Questions
My PDF has form fields but they do not appear in the tool — why?
Some PDFs that appear to have form fields are actually flat images of a form — the fields are drawn but are not interactive PDF form elements. These "image forms" cannot be filled digitally. In this case, use the OCR PDF tool to make the document text-searchable, or print and fill by hand. A genuine fillable PDF form will have interactive field elements detectable by PDFTools.
Can I save my progress and come back later?
PDFTools processes forms in real time — there is no save-and-resume feature. If your session ends before you download the completed form, you will need to re-upload and fill the form again. Download your completed form as soon as it is ready.
Is the Fill PDF Form tool free?
Yes. Filling standard PDF forms is a free feature on PDFTools. No account or subscription is required.