Fillable PDF online free — AI detects every field for you

Yes — the Free plan includes everything with a watermark and 0 AI Deep Detect, with no credit card and no Adobe ID. A free account is required so your document and 24-h secure storage are available after upload. The free output carries a watermark, removed on paid plans (Smallpdf free watermarks signed PDFs after 2 tasks/day; Sejda free auto-deletes after 2 h). Start removes the watermark, unlocks 8 AI Deep Detect/mo and AI auto-detect-fields, and costs $8.99/mo — cheaper than Adobe Acrobat Pro $19.99/mo, Acrobat Standard $14.99/mo Windows-only, pdfFiller Premium $20/mo, Smallpdf Pro $15/mo, DocuSign Personal $10/mo (5-envelope cap), Adobe Sign $14.99/mo, Canva Pro $14.99/mo and JotForm Standard $34/mo.

Adobe Acrobat $19.99/mo, Smallpdf $9/mo Pro, Sejda $7.50/mo Web, pdfFiller $20/mo Premium, JotForm $34/mo, iLovePDF Premium $7/mo, PDF24 Tools (free) and Canva $14.99/mo all detect AcroForm fields if the original PDF was already built as a form (ISO 32000-2:2020 §12.7) — but the IRS Form 1040, USCIS I-9, DD Form 214 and most state DMV PDFs ship as flat scans with no AcroForm layer at all. On those, every competitor forces you to manually click each field, draw the text-box rectangle and adjust the size and font — a 60-field 1040 takes 15-30 minutes. iFillPDF runs an AI vision pass that locates text inputs, checkboxes, radio buttons, dropdowns, date pickers and signature zones in ~600 ms with correct tab order and validation flags. Same engine, same result, on AcroForm + flat scan + legacy XFA (XFA deprecated in PDF 2.0 Annex L but still readable).

Yes — that is exactly what the AI auto-detect does. Drop a flat scan or a PDF exported from Word/Google Docs and we generate a native AcroForm-compatible interactive PDF (text, multi-line text, checkbox, radio button group, dropdown, listbox, signature, date picker) compliant with ISO 32000-2:2020 §12.7 (Interactive Forms) and tagged for WCAG 2.1 AA + PDF/UA-1 ISO 14289-1 accessibility. Recipients fill it in any modern PDF reader (Adobe Reader, Apple Preview macOS Sequoia, Foxit, Edge built-in viewer, Firefox PDF.js) without needing iFillPDF. For comparison: pdfFiller Premium $20/mo charges from the first form, DocFly $4.99/mo caps fillable forms at 3/mo on free, Sejda free caps at 200 pages OR 50 MB OR 3 tasks/hr, Adobe Acrobat $19.99/mo requires desktop install + Adobe ID, Canva produces flat rasterized PDFs with zero interactive fields. iFillPDF Free includes everything with a watermark and 0 AI Deep Detect; Start $8.99/mo unlocks 8 AI Deep Detect/mo.

Yes. iFillPDF auto-detects every standard IRS field — SSN/EIN, address blocks, exemption codes, withholding lines, signature and date — on the official IRS PDFs (which ship as flat scans without an AcroForm layer, the exact case where Adobe and Smallpdf force you to draw each box manually). Output is a flattened, print-ready ISO 32000-2:2020 PDF accepted by US employers, payers and the IRS for backup withholding (Form W-9), 1099-NEC reporting, FATCA W-8BEN, IRS Form 1040 individual return and Form 8879 IRS e-file signature authorization (which the IRS specifically allows under Pub 1345 with audit-trail proof — covered by our SHA-256 proof log). USCIS I-9 (employment eligibility verification, 8 CFR §274a.2), DS-160 (DOS), VA forms and most US federal documents are also supported. Output is also exportable as ISO 19005-3 PDF/A-3 for 26 USC §6001 retention.

United States: yes — electronic signatures have the same legal weight as handwritten ones under the federal ESIGN Act of 2000 (15 USC §7001), UETA §9 adopted by 49 states + DC (New York follows its own ESRA Art. III §304 which is functionally equivalent), and FRCP Rule 34 ESI for evidentiary discovery. Three things must be provable: intent to sign, attribution to the signer, integrity of the signed document — all three captured in the iFillPDF SHA-256 proof log (IP, RFC 3161 timestamp, device fingerprint, document hash). FRE Rule 902(13)-(14) makes the proof log self-authenticating. EU: eIDAS Regulation (EU) 910/2014 recognizes Simple, Advanced and Qualified levels — iFillPDF emits Simple on Free, Advanced (Art. 26) on Start and above. Qualified Electronic Signatures (Art. 28, equivalent to handwritten) require a qualified trust service provider and are a separate level. Carve-outs remain for wills, codicils, family law (divorce, adoption) and court orders.

No US Cloud Act / FISA 702 / Executive Order 14086 reach. PDFs are processed and stored on Hetzner Falkenstein eu-central-1 (Germany) — EU-resident infrastructure under the EU-US Data Privacy Framework adequacy decision (TADPF, July 2023). AES-256-GCM at rest, TLS 1.3 in transit, FedRAMP-aligned controls, SOC 2 Type II audited 2025, ISO/IEC 27001:2022 certified, GDPR Art. 5(1)(c) data minimization compliant, HIPAA-ready Business Associate Agreement on the Unlimited plan (note: HHS guidance is explicit that a password-protected PDF alone is NOT HIPAA compliant — full encryption + audit logs + breach-notification procedures + BAA all required). Files purged within 24 h, never used to train any third-party AI model — explicitly stated in our Terms. By contrast: Adobe AWS us-east-1, pdfFiller AWS US, DocFly AWS us-east-1 and Smallpdf (Switzerland HQ but US-routed CDN) all sit within Cloud Act 50 USC §3024 reach.

Full ISO 32000-2:2020 (PDF 2.0) coverage including §12.7 Interactive Forms (AcroForm). Every form-field type: text (single + multi-line), checkbox, radio-button group, dropdown (combo box), listbox, push button, signature field, digital-signature field with PKI X.509 certificate, date picker. Properties preserved: tab order, required/read-only flags, max-length, regex validation, tooltip help, JavaScript actions (calculate/format/validate). Output: AcroForm by default (XFA — XML Forms Architecture used by Adobe LiveCycle — was deprecated in PDF 2.0 Annex L; we read legacy XFA but emit AcroForm for compatibility with Adobe Reader, Apple Preview macOS Sequoia, Foxit, Edge built-in viewer and Firefox PDF.js). Tagged PDF accessibility per WCAG 2.1 AA + PDF/UA-1 ISO 14289-1. Optional ISO 19005-3 PDF/A-3 archive output for 26 USC §6001 IRS retention, 17 CFR §232.302 SEC EDGAR filings and HIPAA 45 CFR §164.316(b)(2) 6-year medical retention.

No to all three. Everything runs in your browser (Chrome, Safari, Firefox, Edge) on Windows, Mac, Linux, iPhone, iPad and Android. No Adobe Acrobat $19.99/mo desktop install (Mac + Windows), no Adobe Acrobat Standard $14.99/mo Windows-only install, no Adobe ID required even for the free editor (Adobe explicitly states on adobe.com/acrobat/online: sign in to add your comments — meaning the free tool is gated behind an Adobe ID), no Foxit PhantomPDF $129 one-time install, no Soda PDF $7.99/mo desktop, no UPDF $9.99/mo desktop, no DocuSign desktop app, no Chrome extension. Same AI auto-detect on iPhone, iPad and Android — touch-fill and finger-sign supported.