How It Works
This converter runs entirely inside your web browser. When you type Markdown into the left pane, a custom parser tokenizes the text and transforms it into HTML for the live preview on the right. When you click "Download as PDF," the tool constructs a valid PDF file byte-by-byte in memory, handling text layout, line wrapping, page breaks, and basic styling. The resulting file is offered as a direct download with no server involvement.
The PDF generator creates proper PDF 1.4 structure, including a header, page objects, content streams with text drawing operators, a cross-reference table, and a trailer. This means every PDF it produces is spec-compliant and opens correctly in all major PDF readers.
Supported Markdown Syntax
The built-in parser handles the most widely used Markdown features without relying on any external library:
- Headings —
# H1through###### H6 - Bold —
**bold**or__bold__ - Italic —
*italic*or_italic_ - Strikethrough —
~~deleted~~ - Inline code —
`code` - Code blocks — triple backtick fences with optional language tag
- Blockquotes —
> quoted text - Ordered lists —
1. item - Unordered lists —
- itemor* item - Links —
[text](url) - Images —
 - Horizontal rules —
---or*** - Tables — pipe-delimited tables with header separator
PDF Output Options
Before generating your PDF, you can configure several output settings to match your needs.
Page Size
Choose between A4 (210 x 297 mm, standard in most countries) and US Letter (8.5 x 11 inches, standard in North America). The converter adjusts margins and text flow to match the selected size.
Themes
Three visual themes are available:
- Light — white background with dark text, ideal for printing
- Dark — dark background with light text, easier on the eyes when reading on screen
- Sepia — warm, paper-like tones for a classic reading experience
Font Size
Adjust the base font size from 8pt to 24pt. Headings scale proportionally based on the base size you choose.
Common Use Cases
Markdown-to-PDF conversion is useful in many scenarios where you need polished documents from plain text source files:
- Documentation — Turn README files and project docs into shareable PDFs
- Reports — Write structured reports in Markdown and distribute as PDF
- Notes — Export study notes or meeting minutes for offline reading
- Resumes — Maintain a Markdown resume and generate a PDF when needed
- Blogging — Preview how Markdown content will look before publishing
- Proposals — Draft client proposals in Markdown and send polished PDFs
Tips for Better PDFs
Getting the best results from this tool comes down to a few simple practices:
- Use headings consistently. Start with
# Titleand use##for major sections,###for subsections. - Keep paragraphs short. Walls of text are harder to read in PDF format than on a web page.
- Use code blocks for technical content. Fenced code blocks render with a monospaced font and distinct background in the PDF.
- Test with the Light theme if you plan to print. Dark and Sepia themes are better for on-screen reading.
- Try different font sizes. 11pt or 12pt works well for most documents; bump up to 14pt for presentations.
Technical Details
The PDF generation in this tool follows the PDF specification (ISO 32000). Each generated file includes:
- A PDF 1.4 header
- A catalog object pointing to the page tree
- Page objects defining media box dimensions
- Content streams with text operators (BT/ET, Tf, Td, Tj)
- Font resource dictionaries using Helvetica (a standard PDF base font)
- A cross-reference table for random access to objects
- A trailer with the root reference and object count
The Markdown parser is built from scratch using regular expressions and line-by-line tokenization. It processes block-level elements first (headings, code blocks, lists, blockquotes, tables, horizontal rules, paragraphs), then applies inline formatting (bold, italic, strikethrough, code, links, images). This two-pass approach is consistent with how most Markdown implementations work, as described in the MDN Markdown reference.