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Better PDF workflows.
On your computer.
Practical advice for filling forms with local AI and reviewing the results.
Research
Can ChatGPT fill out a PDF form? We tested it against Fyllyo on 22 forms
Yes. ChatGPT’s Codex filled 22 test forms 99.1% right. Fyllyo got 94.6% on your Mac, 9 times faster, with nothing uploaded and no cost per form.
Read the guideLaw firms
AI form fillers for law firms: where client files go
We compared 8 AI form fillers law firms use, from each vendor’s own site: what you give them, where client files go, what you get back and the price.
Read the guideMac PDF forms
10 things Mac Preview gets wrong with PDFs: we tested each one
We tested Mac Preview on PDFs: it deleted form scripts, broke a signature, left a redacted name in the file and cut off long entries. All 10, with files.
Read the guideMac PDF forms
PDF form text cut off on Mac? Why it happens, and the fix
Long entries cut off in a PDF form after saving on a Mac? We tested it: macOS turned every auto-size field into fixed 12 pt. Here’s the fix.
Read the guideMac PDF forms
Filled a signed PDF in Preview on Mac? What happens to the signature
Preview lets you type into a signed PDF, then saving removes the signature. We tested it in Acrobat. Here’s how to fill a signed form on a Mac and keep it.
Read the guideMac PDF forms
AutoFill PDF forms on Mac: what it fills, and what it can’t
Preview’s AutoFill fills a PDF form with your name, address and other contact details. See what it can’t fill, and how to fill the rest from documents.
Read the guideMac PDF forms
Acrobat vs Preview on Mac: which do you need for PDF forms?
Preview is enough for reading, signing and simple forms. We tested where it falls short: form totals, “Please wait…” forms and redaction.
Read the guideMac PDF forms
Can’t type in a PDF on Mac? Five causes and the fix for each
Clicking a PDF and nothing happens? It usually has no form fields. Here are the five causes, and how to type into each one on a Mac, for free.
Read the guideMac PDF forms
PDF form not working in Preview? What Preview does to forms
Totals won’t calculate or fields won’t work? We tested what Mac Preview does to a PDF form when you save it, and how to fill it so it works.
Read the guideResearch
We tested 8 OCR readers on tax documents. One made up 73 numbers.
We tested 8 text readers on 578 known amounts in clean pages, scans and phone photos. See which got every number right, missed some or made some up.
Read the guideResearch
Which government PDF forms are XFA? We checked 32
We opened the PDFs of 32 IRS, USCIS, State, SSA, VA, OPM and Canadian forms to see which are XFA, and which show “Please wait…” in Preview.
Read the guideResearch
AI PDF form filling benchmark: government forms filled on a Mac
We recorded local AI filling IRS, USCIS, court and benefits forms from test-client documents. See the fields filled, documents read and seconds per form.
Read the guideResearch
We tested Mac Preview’s redaction. The name was still in the file.
Is Mac Preview’s redaction safe? Not fully. In our test the name stayed in a form field, a comment and the file’s details. Test files and a safe way.
Read the guidePrivacy
Fill a PDF form without uploading your documents
Fill a PDF form from your documents with AI that runs on your Mac. Learn what stays local, the one exception, offline filling and what to check.
Read the guideCost and ownership
AI PDF form filling without a subscription
Compare subscriptions, prepaid filling credits and a one-time license. See what you pay once, what you pay again and what setup costs on top.
Read the guideChoosing a workflow
Choosing a PDF form filler for Mac
Compare Preview, AI that fills forms from your documents, and an AI editor you set up yourself. Choose by the job, where it runs and the cost.
Read the guideA practical tutorial
Turn your fillable PDF into a reusable AI template
Follow a client-intake example with two test clients. You get the blank PDF, the setup instructions and each client’s own documents.
Read the guideDesktop PDF filling
How local AI fills PDF forms from your documents
See five client documents become a filled 1040-X in a recorded test run. Then learn how local filling works and how you check each answer.
Read the guide