Fill PDF Form Online — Free & Private
Fill out PDF forms online. Auto-detects text fields, checkboxes, and dropdowns — 100% in your browser.
Drop a PDF form to fill
Works with PDFs that have fillable form fields
How It Works
Upload a PDF that contains fillable form fields (created with Adobe Acrobat, LibreOffice, or similar tools). The tool automatically detects all interactive fields — text inputs, checkboxes, dropdowns, and radio buttons — and presents them as an editable web form.
Fill in the fields using the generated form interface, then download the completed PDF. The form is "flattened" during export, meaning filled values become permanent text embedded in the page content — the PDF displays correctly in any reader, even those without form support.
Features
- ✓Auto-detects text fields, checkboxes, dropdowns, and radio buttons
- ✓Clean web form UI for intuitive field editing
- ✓Flattens filled forms for universal PDF reader compatibility
- ✓Preserves all non-form PDF content and formatting
- ✓No field limit — handles complex multi-page government and legal forms
- ✓100% client-side — your personal data stays private on your device
- ✓No account required — fill unlimited forms for free
How to Use This Tool
- Upload a PDF containing fillable form fields.
- The tool auto-detects all fields and presents them as an editable web form.
- Fill in the fields — text inputs, checkboxes, dropdowns, and radio buttons are all supported.
- Click "Download" to get the filled and flattened PDF, ready for submission or printing.
Perfect For
- →Individuals filling out IRS tax forms, state forms, and government applications without printing
- →HR professionals completing employee onboarding paperwork and benefits enrollment forms digitally
- →Legal assistants filling out court filings, affidavits, and standard legal forms
- →Students completing university enrollment, financial aid, and housing application forms
- →Insurance claimants filling out claim forms and medical release authorizations
Under the Hood
The tool uses pdf-lib.js to parse the PDF's AcroForm dictionary, which lists all interactive fields with their types, positions, and default values. Each field's widget annotation is read to determine its page location and rendering properties. When flattening, pdf-lib draws the filled text/checkbox state directly into the page's content stream and removes the interactive field annotations.