⚙️ Inside the Engine: The 4-Step Algorithm
Our PDF/A Engineering Converter follows a strict 4-stage protocol to ensure documents pass government validation. Here is the logic behind the code:
Form Flattening (The Lockdown)
Interactive elements like buttons, dropdowns, and text fields are "flattened" into the page content. This prevents future modification, a strict requirement for legal evidence.
Font Embedding (The Container)
Normal PDFs link to fonts on your computer. PDF/A embeds the font file itself inside the document. Our engine injects standard fonts (Helvetica/Times) to ensure text renders correctly on any future device.
ISO Timestamping (The Seal)
We set the ModificationDate to the exact moment of conversion (ISO 8601 format), creating a digital timestamp of when the archive was generated.
XMP Metadata Injection (The Validation)
This is the most critical step. We inject a raw XML packet containing the pdfaid:part="2" and pdfaid:conformance="B" tags. Without this "digital passport," validation software will reject the file.
Why Client-Side Processing?
Unlike servers that store your data, our Sigma-Engine executes these 4 steps directly in your browser's memory heap.
- Step 1: File is loaded into ArrayBuffer.
- Step 2: PDF-Lib modifies the byte stream.
- Step 3: New Blob is generated.
- Step 4: File is downloaded.
Result: 0% Data Transfer to any server.
Technical Comparison: PDF vs PDF/A
| Feature | Regular PDF | PDF/A (Our Output) |
|---|---|---|
| Fonts | External references | Fully embedded |
| Interactive Forms | Editable | Flattened (Read-only) |
| Metadata | Basic Info | Valid XMP Packet |
Ready to Convert?
Run the 4-step engineering protocol on your documents now.
🏛️ Launch PDF/A Converter