Flatten PDF Form Fields
Turn interactive PDF forms into static documents. Locks in filled values so nobody can edit them. Good for securing completed forms.
Most tools never upload your files
Make Form Fields Permanent and Non-Editable
Flattening PDF Forms
Got a filled-out PDF form that you don't want people editing? This converts all the interactive form fields into static content. Text fields, checkboxes, radio buttons, dropdowns and list boxes all become permanent and non-editable. Values stay exactly as they are, just nobody can change them anymore. Good for job applications before submitting, tax forms, medical records, contracts, anything where you want to lock in the answers.
In-browser processing. Document never uploads to a server.
Upload
- Click upload. Pick your PDF with forms, or several at once.
- Up to 100 MB per file.
- Fill in the form first, in any PDF reader or with PDF Form Filler.
Which Fields
- Every kind of form field is handled:
- Field types that get flattened:
- Text fields: text inputs
- Checkboxes
- Radio buttons
- Dropdowns
- List boxes
- If the PDF has no form fields, the tool tells you nothing needed flattening.
How It Works
- No modes to pick:
- Flatten All: Every form field becomes static. One click does it.
Flatten and Download
- Hit "Flatten form".
- Progress bar shows it working through your files.
- Converts every field:
- Text values become regular PDF text
- Checkboxes become static marks
- Dropdowns become fixed text
- Click download to save "filename-flattened.pdf". Several files download together as a ZIP.
- Looks identical but fields aren't editable anymore.
What Gets Flattened:
- Text inputs become permanent text.
- Checkboxes become static marks or empty boxes.
- Radio buttons become permanent selections.
- Dropdowns show selected option as text, dropdown removed.
- Comments and annotations are left as they are.
- The interactive form structure is removed.
- Field scripts stop working, since the fields are gone.
Common Uses:
- Job applications before submitting.
- Tax returns to prevent changes.
- Medical forms for records.
- Contracts to prevent tampering.
- Survey responses for archiving.
- Government forms before submission.
Good to know:
- In-browser: All processing happens client-side, so the document never leaves your device.
- Visual preservation: Looks exactly like filled form. Only editability removed.
- Universal compatibility: Works in all PDF readers.
- One click: Every field in the form is flattened at once.
Upload, process, download. Turns interactive forms into locked documents where nobody can edit your answers. Want to fill and lock in one step? Use PDF Form Filler with the lock option switched on.
Features
- Lock form data
- Preserve values
- Remove interactivity
- Final version
Frequently asked questions
What does it mean to flatten a PDF?
Flattening turns interactive form fields into ordinary page content. The answers stay visible and print the same, but the fields can no longer be clicked or edited.
How do I flatten a PDF form?
Add one or more filled PDF forms and click Flatten form. You download a copy where every field and its value is fixed in place.
Does it flatten comments and annotations too?
No. This tool flattens form fields only. Comments, highlights and other annotations stay as they are.
Can I undo flattening?
No, a flattened copy cannot be turned back into a fillable form. The tool always creates a new file, so keep your original if you may need to change the answers later.
Can I fill in and flatten a form in one step?
Yes. Open the form in PDF Form Filler, type your answers and switch on the option to lock the answers before you save.
Is my PDF uploaded?
No. Flattening runs in your browser, so your form never leaves your device. The tool tells you if a PDF has no form fields to flatten.