AI PDF FILLING. ON YOUR COMPUTER.
Automate PDF form filling. 100% locally.
Cut repetitive data entry without uploading client documents. Fyllyo reads your files, calculates and formats the answers, and fills PDF forms on your computer—with clear source links for review.
One purchase. Yours for life.
$99Lifetime updatesNo subscription for local filling
All client data stays local. Built for privacy-first use cases.
01 / UNDERSTAND & PROCESS
Powerful AI for
complex forms.
Fyllyo combines facts across documents and works out what belongs in each field. It distinguishes a sponsor from an applicant, turns monthly pay into annual income, and formats answers for your form—all on your computer.
02 / WORK ACROSS LANGUAGES
Supports multiple
languages.
Use client documents in different languages and fill your form in the language it requires.
- English
- Spanish
- French
- German
- Italian
- Portuguese
- Dutch
- Polish
03 / KEEP THE FINAL SAY
Validate answers
in one clear view.
Review your filled form and source documents side by side. Clear field-to-source links help you check answers quickly, spot missing information, and make corrections in one place.
- See each answer mapped to its source
- Find key facts and flagged fields quickly
- Save corrections straight to the PDF
04 / YOUR FORMS, TOO
Fill a popular form
or bring your own.
Use a built-in template or add your own fillable PDF. Set it up once, then reuse it for every client.
Find your formI-864
Affidavit of Support
Ready to fill1040-X
Amended Individual Return
Guide · Not a built-in templateW-9
Taxpayer Identification
Guide · Not a built-in templateI-130
Petition for Alien Relative
Add your own fillable PDF
Set it up without code or an API key.
Send only a blank form and instructions for setup—never client data. Check the first few completed forms carefully. About custom-form setup →
05 / GET STARTED
Spend less time
on paperwork.
Buy Fyllyo once. Fill forms on your computer without a recurring AI subscription.
View pricing
Apple silicon · 16 GB memory recommended
About 8 GB free space · One-time model download
Questions before you start?
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.
HELP SHAPE FYLLYO
Tell us what
would help you.
Request a form, suggest a feature, or share feedback.
FUTURE RELEASE Not available yet
Build your own
document pipelines.
Bring together as many source files as your workflow needs. We’re building tools to let you define the steps with AI, run the pipeline locally, and create or update multiple documents in one run.
Fill specific Excel cells, generate PDFs, or transform other documents. You’ll choose the inputs, the logic, and the outputs.