Paste your Markdown in the left pane. The live preview on the right updates as you type. Pick a theme. Plain is the default — clean sans-serif, comfortable margins. Academic uses Georgia serif and wider margins, the look of a published essay. Modern is a tighter system-font layout for one-pagers. Pick a page size. A4 (the worldwide default outside North America) or US Letter. Click "Save as PDF" — your browser's print dialog opens. Set Destination to Save as PDF , click Save, choose a filename. Done. Or use the keyboard shortcut : Ctrl+P (Cmd+P on Mac), then change destination to PDF.

Headings ( # through ###### ), bold, italic, inline code , strikethrough. Fenced code blocks ( ```python ) with light syntax highlighting for JS / TS / Python / Go / JSON / shell. Pipe tables with column alignment ( :---: , :--- , ---: ). Bullet, numbered, and nested lists. Blockquotes (printed with a left rule and light background). Images via URL — ![alt](https://...) . The browser fetches them when you print; if a page break splits one, your browser handles it. Links — preserved as live links in the PDF when supported by your browser.

Margins come from @page CSS , not the print dialog. The theme sets them: Plain = 20 mm, Academic = 24/26 mm, Modern = 16/18 mm. Override in the print dialog only if you must. Headers and footers in the print dialog are the browser's, not ours. Most browsers stamp the URL and date by default. Untick those in the dialog (under "More settings" / "Headers and footers") for a clean PDF. Page breaks happen automatically , but tables and code blocks try not to split across pages. If they do split badly, shorten the content above or change page size. Images need to be reachable URLs. Drag-and-drop image upload isn't supported — that would require either a server or a Base64-encoded URL, both of which defeat the "no upload" guarantee. If you have a local image, use the image-to-base64 tool and paste the result inline as ![alt](data:image/png;base64,...) . Backgrounds may not print by default. Most browsers strip background colours when printing. To keep code-block backgrounds, tick "Background graphics" in the print dialog. This is not LaTeX. Pandoc, Typst, or a real LaTeX toolchain make better-looking long-form documents. Use this tool when "good enough and instant" beats "perfect but takes 20 minutes to set up." Tested in Chrome, Edge, Firefox, Safari. Safari's PDF output can introduce extra page margins; if exact margins matter, prefer Chromium.

No file upload — paste only. Your Markdown stays on your machine. No external rendering — no jsPDF, no html2pdf, no server round-trip. Just the browser print engine plus our CSS. No tracking, no signup, no watermark.

Markdown to PDF

Render markdown to a print-ready PDF in your browser. Paste, preview, save as PDF via browser print dialog. No upload, no server.

Theme

Page size

Markdown

# Photosynthesis lab report

**By:** Jane Doe · **Class:** Year 8 Biology · **Date:** 2026-05-15

## Aim
To investigate the rate of oxygen production by *Elodea* under different light intensities.

## Hypothesis
The closer the light source, the higher the rate of oxygen production, because more photons reach the plant's chlorophyll per second.

## Method
1. Place an *Elodea* sprig in a beaker of water with sodium bicarbonate.
2. Position a lamp at 10 cm, 20 cm, 40 cm distance.
3. Count bubbles released per minute, for 3 minutes per distance.

## Results

| Distance (cm) | Bubbles / min |
|---:|---:|
| 10 | 28 |
| 20 | 14 |
| 40 |  5 |

## Discussion
Rate appears roughly inversely proportional to the **square** of the distance — consistent with the inverse-square law for light intensity.

> Limitation: bubble counting is imprecise; oxygen volume would be a better measure.

```python
# Quick model: rate ∝ 1 / d^2
distances = [10, 20, 40]
rates = [28, 14, 5]
predicted = [rates[0] * (distances[0]/d)**2 for d in distances]
print(predicted)  # [28.0, 7.0, 1.75]
```

## Conclusion
The hypothesis was supported, though absolute values diverge from a clean inverse-square fit at the closest distance — likely because the lamp heats the water enough to slow the reaction.

Preview

Save as PDF uses your browser's built-in print-to-PDF — when the dialog opens, choose Destination: Save as PDF. No external library, no upload, no tracking.

What is this for?

You wrote something in Markdown — a lab report, a syllabus, a one-pager, meeting notes — and now you need a PDF. Most online "Markdown to PDF" tools want you to upload the file, sign up, watermark the output, or download a 5 MB binary. None of that is necessary. Your browser already knows how to make a PDF: it does it every time you hit print and choose "Save as PDF" as the destination. This tool gives Markdown a nicely formatted preview with print-optimised CSS, then hands off to the browser's built-in print dialog. The file never leaves your computer.

How to use it

Paste your Markdown in the left pane. The live preview on the right updates as you type.
Pick a theme. Plain is the default — clean sans-serif, comfortable margins. Academic uses Georgia serif and wider margins, the look of a published essay. Modern is a tighter system-font layout for one-pagers.
Pick a page size. A4 (the worldwide default outside North America) or US Letter.
Click "Save as PDF" — your browser's print dialog opens. Set Destination to Save as PDF, click Save, choose a filename. Done.
Or use the keyboard shortcut: Ctrl+P (Cmd+P on Mac), then change destination to PDF.

What's supported

Headings (# through ######), bold, italic, inline code, strikethrough.
Fenced code blocks (```python) with light syntax highlighting for JS / TS / Python / Go / JSON / shell.
Pipe tables with column alignment (:---:, :---, ---:).
Bullet, numbered, and nested lists.
Blockquotes (printed with a left rule and light background).
Images via URL — ![alt](https://...). The browser fetches them when you print; if a page break splits one, your browser handles it.
Links — preserved as live links in the PDF when supported by your browser.

Common gotchas

Margins come from @page CSS, not the print dialog. The theme sets them: Plain = 20 mm, Academic = 24/26 mm, Modern = 16/18 mm. Override in the print dialog only if you must.
Headers and footers in the print dialog are the browser's, not ours. Most browsers stamp the URL and date by default. Untick those in the dialog (under "More settings" / "Headers and footers") for a clean PDF.
Page breaks happen automatically, but tables and code blocks try not to split across pages. If they do split badly, shorten the content above or change page size.
Images need to be reachable URLs. Drag-and-drop image upload isn't supported — that would require either a server or a Base64-encoded URL, both of which defeat the "no upload" guarantee. If you have a local image, use the image-to-base64 tool and paste the result inline as ![alt](data:image/png;base64,...).
Backgrounds may not print by default. Most browsers strip background colours when printing. To keep code-block backgrounds, tick "Background graphics" in the print dialog.
This is not LaTeX. Pandoc, Typst, or a real LaTeX toolchain make better-looking long-form documents. Use this tool when "good enough and instant" beats "perfect but takes 20 minutes to set up."
Tested in Chrome, Edge, Firefox, Safari. Safari's PDF output can introduce extra page margins; if exact margins matter, prefer Chromium.

What it doesn't do

No file upload — paste only. Your Markdown stays on your machine.
No external rendering — no jsPDF, no html2pdf, no server round-trip. Just the browser print engine plus our CSS.
No tracking, no signup, no watermark.