Portable Document Format
MIME type: application/pdf
PDF is a file format developed by Adobe for presenting documents consistently across all platforms and devices. It can contain text, images, vector graphics, forms, multimedia, and digital signatures.
Advantages
- +Looks identical on every device and OS
- +Supports text, images, forms, and multimedia
- +Can be encrypted and digitally signed
- +Widely accepted for legal and business documents
Limitations
- -Difficult to edit without specialized software
- -Can produce large file sizes with embedded fonts/images
- -Accessibility can be poor if not properly tagged
- -Not ideal for responsive/reflowable content
Common Use Cases
Technical Details
PDF is based on PostScript and uses a page description language to define text, fonts, images, and vector graphics. Content is organized in a tree of objects referenced by a cross-reference table. Text can be embedded as Unicode with subset-embedded fonts. Images are stored using JPEG, JPEG2000, CCITT, or Flate compression. PDF 2.0 (ISO 32000-2:2020) is the current standard.
Frequently Asked Questions
How do I reduce PDF file size?
PDF compression works by downsampling images, removing embedded fonts subsets, and optimizing the internal structure. BriskTool's PDF compressor can reduce file sizes by 50-90% while maintaining readable quality.
How do I merge multiple PDFs?
Use BriskTool's PDF merger — drag and drop multiple PDF files, reorder them, and download the combined file. Everything processes in your browser with no uploads.