How to Fill PDF Forms
The tool inspects standard AcroForm fields. Supported text fields, checkboxes, radio groups, dropdowns and option lists are shown in a form panel, and saved values are written into the actual PDF form fields.
The tool inspects standard AcroForm fields. Supported text fields, checkboxes, radio groups, dropdowns and option lists are shown in a form panel, and saved values are written into the actual PDF form fields. The interface is designed to keep the active PDF workflow near the top of the page, while this guide explains what the tool changes, what it preserves, and where a different PDF tool is the safer choice.
Create Fillable PDF Fields
Create mode adds real interactive fields to a selected PDF page. Text fields, checkboxes, radio groups and dropdowns receive unique internal names and are positioned using page-relative coordinates.
Create mode adds real interactive fields to a selected PDF page. Text fields, checkboxes, radio groups and dropdowns receive unique internal names and are positioned using page-relative coordinates. The interface is designed to keep the active PDF workflow near the top of the page, while this guide explains what the tool changes, what it preserves, and where a different PDF tool is the safer choice.
Interactive vs Flattened Forms
Interactive output keeps fields editable. Flattening creates fixed appearances and removes form editability in the exported copy. Because flattening is destructive to interactivity, the interface shows a warning before it is used.
Interactive output keeps fields editable. Flattening creates fixed appearances and removes form editability in the exported copy. Because flattening is destructive to interactivity, the interface shows a warning before it is used. The interface is designed to keep the active PDF workflow near the top of the page, while this guide explains what the tool changes, what it preserves, and where a different PDF tool is the safer choice.
AcroForm vs XFA
AcroForm is the standard PDF form technology supported by pdf-lib. XFA is a different forms architecture. If an XFA structure is detected, the tool explains that it is unsupported instead of pretending to edit it.
AcroForm is the standard PDF form technology supported by pdf-lib. XFA is a different forms architecture. If an XFA structure is detected, the tool explains that it is unsupported instead of pretending to edit it. The interface is designed to keep the active PDF workflow near the top of the page, while this guide explains what the tool changes, what it preserves, and where a different PDF tool is the safer choice.
Field Types
Text fields can hold single-line or multiline values where supported. Checkboxes store checked state, radio groups store one selected option, and dropdowns store one of their available choices.
Text fields can hold single-line or multiline values where supported. Checkboxes store checked state, radio groups store one selected option, and dropdowns store one of their available choices. The interface is designed to keep the active PDF workflow near the top of the page, while this guide explains what the tool changes, what it preserves, and where a different PDF tool is the safer choice.
Signatures
A PDF signature field is not the same as applying a cryptographic digital signature. This tool does not claim to issue certificate-based signatures.
A PDF signature field is not the same as applying a cryptographic digital signature. This tool does not claim to issue certificate-based signatures. The interface is designed to keep the active PDF workflow near the top of the page, while this guide explains what the tool changes, what it preserves, and where a different PDF tool is the safer choice.
Privacy
Form values can be sensitive. They remain in browser memory during the editing session and are not sent to analytics or a remote form service.
Form values can be sensitive. They remain in browser memory during the editing session and are not sent to analytics or a remote form service. The interface is designed to keep the active PDF workflow near the top of the page, while this guide explains what the tool changes, what it preserves, and where a different PDF tool is the safer choice.
Frequently Asked Questions
Can I fill an existing form?
Yes, for supported AcroForm fields.
Can I create a fillable PDF?
Yes.
Can I add checkboxes?
Yes.
Can I add dropdowns?
Yes.
What is AcroForm?
It is the standard interactive form model supported by this tool.
Are XFA forms supported?
No.
What does flattening mean?
It converts field appearances into fixed page content and removes editability.
Can this digitally sign PDFs?
No cryptographic signing is claimed.
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