Understanding PDF Formats: Standard PDF vs. PDF/A

What is PDF/A?

PDF/A is an ISO-standardized version of the Portable Document Format (PDF) specialized for the digital preservation of electronic documents. Unlike standard PDFs, PDF/A restricts features that prevent long-term archiving, such as external font linking and executable scripts.

Key Differences

• Font Embedding: PDF/A requires all fonts used in the document to be embedded directly within the file, ensuring it displays identically on any device in the future.
• No Audio or Video: PDF/A prohibits audio, video, and other multimedia content.
• No JavaScript: Scripts are disallowed to prevent security exploits and code obsolescence.
• Device-Independent Color: Requires device-independent color spaces (like sRGB) to ensure consistent color reproduction.

When to Use PDF/A

You should use PDF/A when archiving legal records, historical contracts, academic papers, and government files that must remain readable for decades. For everyday file adjustments like merging, splitting, or compressing, you can use our Free Local PDF Tools.