Built with zero-retention privacy by design.
Your forms, resumes, and personal records are processed locally in your session. No remote database storage, no tracking, and zero model training.
On-Device Local Processing
Form parsing, field coordinate calculations, and PDF object compilation run locally on your device. Your sensitive PDFs are never uploaded to persistent cloud storage buffers.
Zero AI Model Training
We never use your resumes, biographical notes, tax filings, or completed submissions to train, fine-tune, or evaluate external AI models. Your proprietary data stays entirely yours.
Vector-Accurate PDF Injection
Rather than converting pages into unencrypted flat images, SpaceFill directly modifies the PDF’s internal AcroForm objects. Original fonts, barcodes, and digital seals remain 100% compliant.
Session File Isolation
Every form session is isolated in temporary memory. You can wipe all uploaded sources and session memory with a single click at any time.
Security & Data Handling Matrix
Technical overview of how data moves through SpaceFill
Ready to automate your forms securely?
Upload your standard AcroForm PDF and start filling fields in seconds with complete peace of mind.