Automate PDF form filling. 100% locally.

Fyllyo reads your client documents, works out every answer, and fills the PDF on your Mac—with a source for each answer so you can check it.

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$99 once · Lifetime updates · No subscription for local filling

The Fyllyo app after filling Form I-864 for a client: 60 fields filled in 19 seconds, each answer shown with the line from the client's document it came from and a box to confirm it, next to the filled PDF.

Client documents never leave your computer.

Watch it fill a 1040-X

Five client documents in. An amended return out: 52 fields filled in 22 seconds on a Mac, then checked line by line.

Does the careful work for you

Fyllyo reads every document the way you would, then fills the form the way the form asks. These are from the run in the video.

Drop in everything the client sent

The original return, corrected forms, the client’s email, your worksheet. PDFs, Word files, scans and notes, as many as you have.

Five files added for the Okafors: a late 1099-INT, the 2024 Form 1040 as filed, the client's email, the preparer's worksheet and a W-2c.

Facts from every document

Each answer quotes the lines it came from, even when they’re in different files.

The taxpayer's first name and middle initial, James C, shown with matching lines from the 1099-INT and the original Form 1040, and marked checked.

The bottom line, with its working

Line 20: the Okafors owe $449. The worksheet lines behind it sit right under the answer.

Line 20, amount you owe: 449, with the preparer's worksheet lines explaining the W-2c wage increase and the amount owed.

A blank, not a guess

When a field should stay empty, Fyllyo leaves it empty and tells you what the documents said, so the call is yours.

Two dependent-count lines left empty, each with a note that the documents show 2 but a rule left the field empty, and a box to confirm.

Pick your form

Sponsor details from many documents. Reads passports, employment letters and paystubs, turns monthly pay into annual income, and keeps the sponsor and the applicant apart.

About Form I-864

Page 1 of Form I-864 as Fyllyo filled it for a test client: the petitioner box is ticked, the attorney bar number is entered, and the sponsor's name reads Morales, Daniel, Reyes.

Questions

Does Fyllyo work offline?

Fyllyo fills configured PDF forms offline after the initial model download and form setup. Client documents are processed on your computer. Adding a custom form uses Fyllyo Cloud with only the blank PDF and your setup instructions.

What documents can I use?

Use PDFs, scans, photos, Word files, and typed notes. Add several files for the same client. Use clear, readable documents, and a blank fillable PDF when adding your own form.

Do I need an API key?

No. Fyllyo provides the service that sets up new forms. You can use your own API key if you prefer. Keep client details out of the blank form and setup instructions.

What if an answer is missing or wrong?

Fyllyo leaves uncertain answers blank and flags them for you. Check the source, confirm key facts, and edit answers before saving. Always review the PDF. Fyllyo does not provide legal or tax advice or file forms for you.

See all questions

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