Last updated 08-02-2026
Category:
Reviews:
Join thousands of AI enthusiasts in the World of AI!
Simplicity AI
Simplicity AI is a browser-based PDF form filler for tax, immigration, employment, healthcare, and legal paperwork. You upload a blank PDF, answer guided questions or attach source documents, and the tool maps answers into the correct fields before you sign and export. It also converts flat or scanned PDFs into interactive forms and ships ready-made templates for government forms like W-9, I-864, DS-11, and I-9.
Most PDF editors just let you type over the page. Simplicity reads field types and context, matches data from source files you upload alongside the blank form, and shows a live side-by-side preview on immigration workflows. Autofill, static-to-interactive conversion, e-signatures, and export live in one workflow instead of juggling separate apps.
HR teams processing I-9 and W-4 packets, tax preparers handling 1099s, clinics managing intake forms, and individuals filing passport or visa paperwork are the main audiences. ProtonLabs Technology Inc runs the product with a free tier, Premium at $15 per month, Pro at $29.17 per month, and custom enterprise contracts.
Premium plan includes 10 AI AutoFills per month and 20 digital forms
Detects fields on non-fillable PDFs and converts them into interactive web forms
Matches up to 10 source documents per form on Premium for autofill
Built-in digital signatures using finger, stylus, or typed text
Pro plan supports PDF uploads up to 5 GB and 300 stored documents
Premium and Pro plans support 50+ languages for uploaded documents
Developer API free tier allows 100 file uploads and 5 AI auto-fills per month
Converts static or scanned PDFs into fillable forms without manual field mapping.
Autofills blank forms from multiple source documents in one session.
Combines guided filling, e-signatures, and PDF export in a single browser workflow.
Free plan requires no credit card to start testing forms.
Ships templates for common U.S. government tax, immigration, and employment forms.
Native iOS and Android apps mirror the web autofill and signing experience.
Free plan limits you to 1 AI AutoFill and 2 digital forms per month.
Free plan caps uploads at 25MB while Pro allows files up to 5 GB.
Production API access starts at $59.99 per month on the Premium API tier.
Heavy users on the Pro plan still face a 30 AI AutoFill monthly cap.
Is Simplicity AI free to use?
Yes. Simplicity AI offers a free plan at $0 per month with 1 AI AutoFill, 2 digital forms, and 25MB file support. You can sign up without a credit card to test the form filler before upgrading to Premium or Pro.
What forms can Simplicity AI fill?
Simplicity AI fills PDF tax forms like W-9 and 1099-NEC, immigration documents like DS-11 and I-864, employment forms like I-9 and W-4, plus healthcare, legal, and insurance paperwork. The site lists dozens of government templates ready to open and complete.
How does Simplicity AI autofill from source documents?
Simplicity AI lets you upload a blank PDF plus source files such as a passport scan or prior completed form. The tool reads both, matches field names and context, and populates the blank form so you can review every entry before export.
What does Simplicity AI Premium cost?
Simplicity AI Premium is $15 per month, or $179.99 billed annually. It includes 10 AI AutoFills per month, 20 digital forms, 2 GB file support, smart formatting, 50+ language support, and 24/7 email and chat support.
Does Simplicity AI have a mobile app?
Yes. Simplicity AI offers native iOS and Android apps that turn PDFs into guided mobile forms, support AI autofill from phone storage, and let you sign documents on screen before exporting.
Does Simplicity AI train models on my documents?
No. Simplicity AI states that uploaded files are encrypted, not shared with other users, and not used to train AI models. Premium and Pro plans list AES-256 encryption with a zero training policy and automatic deletion.
Does Simplicity AI offer a developer API?
Yes. Simplicity AI provides a Developers API for document upload, structured extraction, autofill, PDF-to-digital conversion, webhooks, and digital signatures. The free API tier includes 100 monthly file uploads and 5 AI auto-fills.