Fill PDF Forms Online — Free & Private
Interactive PDF forms are often clunky to fill on a phone or a browser's built-in viewer. DoctorDocs detects the form's fields and turns them into a clean, responsive web form you can fill in seconds.
Everything happens locally — pdf-lib runs the whole process in your browser, so your form data and the document itself are never uploaded anywhere.
Key Capabilities
Detects every AcroForm field type
Automatically finds text boxes, checkboxes, radio button groups, and dropdowns embedded in the PDF and renders them as a responsive web form.
Flatten on save locks your answers
Choose to flatten the completed form before downloading — this permanently burns your responses into the page content so they can't be altered later.
Tells you when a PDF isn't fillable
If a PDF has no interactive fields (a scanned or flattened form), the tool tells you instead of failing silently — use the PDF Editor to type directly onto those pages.
How to Use
Upload your PDF form
Drag in any PDF that contains interactive form fields.
Fill in the detected fields
Type into text boxes, tick checkboxes, and select radio or dropdown options exactly as they appear in the original layout.
Flatten and download
Optionally flatten the form to lock your answers permanently, then save the completed PDF to your device.
Common Use Cases
- Government and tax formsFill out an official tax or benefits PDF without printing, without an Adobe subscription, and without uploading financial data anywhere.
- Job applications and onboardingComplete an employer's application PDF or new-hire packet directly in the browser and download the finished file in seconds.
Frequently Asked Questions
Can I flatten the form so it can't be edited anymore?
Yes. Choose "Flatten on save" when downloading. This merges your responses into the page content stream permanently, preventing anyone else from modifying the form fields later.
Is my form data stored anywhere?
No. All form filling happens locally in your browser. Your typed information and the PDF itself are never uploaded to our servers or saved in any database.
What if my PDF has no interactive fields?
The tool detects standard AcroForm fields (text boxes, checkboxes, radio buttons, dropdowns) only. If your PDF is flat or scanned with no interactive fields, use the PDF Editor tool instead to type directly onto the page.