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Form Builder Quickstart

1. Open Your PDF​

Go to Form Builder, then choose or drop one supported PDF. The editor is available before sign-in.

2. Add Text Fields​

Choose Add text field to place a field on the current page. Select the field to move, resize, rename, or delete it.

Field names must be unique. A name cannot conflict with another reviewed field or an existing field already stored in the source PDF. Field names are limited to 64 characters.

3. Optionally Run Assisted Detection​

Choose Auto-detect fields to look for possible field locations in the browser. You can cancel while detection is running.

When detection finishes, review every proposed field. Manual fields remain unchanged. If you run detection again, Form Builder asks before replacing only the previously detected fields.

4. Use The Local Draft​

Form Builder saves one unfinished browser-local draft. Returning to Form Builder restores the PDF and reviewed field state when that draft is valid.

Form Builder opens a PDF only after the source PDF and its clean workspace have both been saved. If browser storage is full or unavailable, the editor stays empty and does not retain a partial draft.

Use the More options menu to manage the current document:

  • Open another PDF… prepares another file, then asks before replacing the current PDF and its browser workspace.
  • Close PDF asks before removing the current PDF and its saved workspace from this browser.
  • Organize pages opens the desktop page organizer. This action is not available on mobile.
  • Remove all edits… removes the manual and detected text fields you added. It keeps existing fields already stored in the source PDF, page organization, and the current page.

5. Export​

Choose Export fillable PDF. Sign in if requested. Form Builder sends the source PDF and reviewed text-field metadata to the authenticated export service, creates the fields in RAM, and returns the completed PDF directly.

The default filename is <original-basename>_fillable.pdf.

Troubleshooting​

  • If no possible fields are found, add fields manually.
  • If detection is cancelled or fails, existing fields stay unchanged.
  • Convert XFA documents to a flat PDF before using Form Builder.
  • Remove password protection before opening an encrypted PDF.
  • Confirm every field name and placement before export.

Read the Form Builder Overview for limits, privacy, and product boundaries.