Document to PDF (Markdown / plain text)

Features

• Markdown layout: graded headings, lists with nested indentation, quotes, fenced code blocks, horizontal rules
• Inline formatting: bold, italic, inline code
• CJK line breaking, plus the most common kinsoku rule (punctuation is never left at the start of a line)
• Automatic pagination, with code blocks kept whole (splitting a listing in half is worse than an extra page)
• A4 or Letter, portrait or landscape
• Adjustable type size and margins, with toggles for Markdown parsing and page numbers
• With Markdown parsing off, the text is laid out verbatim — markers appear as written
• The result card reports the page count and the file size
• Documents over 100,000 characters are refused clearly rather than freezing the tab
• Everything runs locally in the browser; the document is never uploaded

How to use

1. Paste Markdown or plain text
2. Adjust paper, type size and margins as needed
3. Press Generate PDF
4. Press Download PDF

FAQ

Why is the text in the PDF not selectable?

Because it is an image. Putting text into a PDF requires embedding a font, and for Chinese or Japanese there is no standard built-in one — you would have to embed a CJK font, the smallest usable being several megabytes. For a static site that should work the moment it opens, making the browser download megabytes of font for one tool page is a bad trade. So this lays text out on a canvas using the browser own fonts and places each page into the PDF as an image: CJK and emoji all render correctly, with no extra download and no network. The cost is that the text cannot be selected or searched, and the file is larger than a text-based PDF.

What if I need selectable, searchable text?

Use the browser own Print → Save as PDF. Paste the content anywhere that renders rich text (a Markdown preview, a web page, Word), press Ctrl/Cmd + P and choose Save as PDF. That route goes through the browser layout engine and the output is real text: selectable, searchable and much smaller. What this tool is for is turning plain text into a PDF you can send, in places where nothing else will.

Which Markdown syntax is supported?

Block level: `#` to `######` headings, `-` and `1.` lists (nested by indentation), `>` quotes, triple-backtick fenced code blocks and `---` rules. Inline: `bold`, `*italic*` and `` `inline code` ``. Deliberately unsupported: tables, images, footnotes and raw HTML — they need either a real layout engine (table column widths) or external resources (images). Inline markers do not nest (bold wrapped around italic will not do what you expect), matching the rule used elsewhere on this site. Anything not parsed appears in the PDF as written.

Why does the CJK line breaking look right?

Two things together. First, splitting on spaces and only then breaking over-long "words" by character — Chinese has no spaces, so a whole paragraph is one word, and splitting on spaces alone would overflow the line. Second, kinsoku: a full stop or comma that lands at the start of a line is pulled back to the previous one. The complete kinsoku rules run to dozens of cases (plus punctuation compression and start/end prohibitions) and belong to a layout engine; handling the most common layer is enough here — doing less is better than doing it wrong.

Is there a length limit?

Over 100,000 characters is refused, with the reason given. Layout and drawing are synchronous (measuring every line, painting every page), and a few hundred thousand characters would freeze the tab for tens of seconds — at which point the user simply concludes the tool is broken. So it refuses before starting and suggests splitting the document. Size is mostly a function of page count: each page is a 2× PNG, roughly one to two hundred kilobytes.

Is my document uploaded?

No. Layout, drawing and PDF assembly all happen in browser memory; the page makes no requests and works offline.