How to Work with PDF Forms: Unlock, Extract & Lock

PDF forms are everywhere — applications, contracts, tax documents, sign-up sheets. But working with them can be fiddly: a form that won't let you type, answers you need to pull out into a spreadsheet, or fields you want to lock so they can't be changed. Here's the toolkit for handling PDF forms end to end, all in your browser.

Unlock a form you can't fill

Some PDFs look like forms but won't accept input — the fields are restricted or the document is protected. The Unlock Forms tool removes those restrictions so you can actually type into the fields.

Extract the data out of a form

Collected a stack of filled forms and need the answers as data? The Form Data tool pulls the field values out of a filled PDF form so you can move them into a spreadsheet or database instead of copying by hand.

Lock a completed form

Once a form is filled and signed, flatten it so the answers can't be edited or reset. The Flatten tool merges the field values permanently into the page — essential before emailing a signed form back.

The form workflow

Tips

• Fill, sign, then flatten — in that order. Flattening is permanent, so do it last, once everything is complete.
• Keep an editable copy. Flatten a duplicate so you still have a version you can change later if needed.
• Extract before flattening. If you need the data, pull it with the Form Data tool while the fields are still live.

Summary

Handling PDF forms is a simple pipeline: unlock a form that won't accept input, extract the answers when you need the data, and flatten to lock a completed form. Fill, sign, then flatten last — and keep an editable copy. Every step runs free and private in your browser.