Compare Portable Document Format and Markdown formats — understand the key differences and when to use each
Portable Document Format
PDF (Portable Document Format) was created by Adobe in 1993 and is now the world's most widely used document format, standardized as ISO 32000. PDF preserves exact formatting, fonts, images, and layout across all devices, operating systems, and printers. It supports interactive forms, digital signatures, password protection, and accessibility features. PDFs can contain text, vector graphics, raster images, and even embedded multimedia. The format is ideal for contracts, invoices, reports, eBooks, manuals, and any document where consistent visual presentation is critical. PDF/A is an archival variant used for long-term document preservation. Modern PDFs support layers, 3D content, JavaScript, and annotation tools. With Convert999, you can convert PDF files to Word (DOCX), images (JPG, PNG), spreadsheets (XLSX), presentations (PPTX), and many more formats — all processed locally in your browser for maximum privacy.
Markdown
MD (Markdown) is a lightweight markup language created by John Gruber in 2004. Markdown uses plain text formatting syntax (#, *, -, etc.) that converts to HTML. It's the standard format for README files, documentation, technical writing, and note-taking. Markdown is used by GitHub, GitLab, Stack Overflow, Reddit, Discord, and thousands of other platforms. Various flavors exist including CommonMark, GitHub Flavored Markdown (GFM), and MultiMarkdown.
| Feature | MD | |
|---|---|---|
| Full Name | Portable Document Format | Markdown |
| File Extension | .md | |
| Category | document | document |
| Free to Convert | ✓ Yes | ✓ Yes |
| Browser Support | ✓ All Browsers | ✓ All Browsers |
| Convert to Each Other | ✓ Yes | ✓ Yes |
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