How to use Just Fill PDF

Quick start

Nothing needs to be installed. Open the editor in your browser, choose a PDF, and start filling.

1. Open a PDF or try the sample PDF.
2. Choose a field type from the left panel.
3. Click the PDF where the field should go.
4. Type directly into Text, Date, Initials, or Signature fields.
5. Use Review to hide editing boxes and preview the completed PDF.
6. Unlock Download or Print when you're done.

Filling flat or non-fillable PDFs

Just Fill PDF works by placing new fields on top of the PDF page. That means it can help with flat or non-fillable PDFs when you need to add names, addresses, dates, checkmarks, initials, or a typed signature.

Field types

• Text: Add typed text anywhere on the PDF.
• Date: Add a date and edit it directly on the PDF.
• Checkmark: Add a checkmark to a box or option.
• Initials: Add initials. Your preferred initials can be remembered in this browser.
• Signature: Add a typed signature. Your preferred signature can be remembered in this browser.

Editing fields

• Click a field to select or edit it.
• Type directly into Text, Date, Initials, or Signature fields.
• Drag fields to adjust placement.
• Use Field details for fine tuning and deleting a selected field.
• Select a placed field and use the arrow keys to nudge it into position.
• Hold Shift while pressing an arrow key to move the selected field in larger steps.
• Arrow-key nudging is useful when a field is close but needs to line up better with the PDF.
• Press Review or click blank space when idle to preview without editing boxes.
• Use Back to editing to continue making changes.

Saving and printing

You can open a PDF, add fields, and review your work before purchasing. Downloading and printing require a $9 one-time unlock, which includes unlimited downloads and prints. There is no subscription. The original PDF is not changed.

When you click Download or Print, the unlock flow explains the one-time purchase and lets existing customers enter a license key.

Is the $9 unlock for one PDF?

No. The $9 one-time unlock enables unlimited downloads and prints. It is not a per-document fee.

Where do I find my license key?

After purchase, Lemon Squeezy emails your license key in your receipt. Open Just Fill PDF, click Download or Print, then paste that license key into the unlock box.

A valid license is remembered in this browser. You may need to enter it again if you use a different browser or device, use private browsing, clear browser data, or if the license later fails validation.

Can I restore my purchase on another computer or browser?

Yes. Enter the same license key from your Lemon Squeezy receipt on another browser or computer to restore access, subject to the license activation limit. Each browser remembers the unlock locally after activation.

Do I need an account?

No. You do not need a Just Fill PDF account to open a PDF, add fields, or review your work. Payment is handled by Lemon Squeezy, and Just Fill PDF checks your license key when download or print needs to unlock.

Privacy

Your PDF stays on your device. The editor does not upload your PDF for filling. License activation and validation send the license key and a browser license instance; they do not send PDF files, filenames, field values, signatures, initials, dates, or checkmark choices.

Analytics includes page views and limited product-usage events, not PDF contents, filenames, or form entries. Feedback is sent through Formspree only when you submit the form. Just Fill PDF does not currently use a separate error-reporting service.

What Just Fill PDF does not do yet

It does not edit existing PDF text, perform OCR, or merge and split pages. It is intentionally focused on filling PDFs quickly.