How to convert Markdown to PDF to beautify the style and layout

Key points of this article

Markdown itself does not have layout. The font, title size and spacing are determined by style rules. Think about the target layout before converting.
Set styles for titles, paragraphs, code blocks, and tables separately, making it easier to get a tidy PDF than adjusting just one font size for the entire article.
First export to HTML and then use the browser to print to PDF. You can see the style effect at the same time and make it easy to adjust repeatedly.
After generating the PDF, check the paging, whether the code block is wrapped, whether the table overflows, and check whether the formulas and charts are complete.

After many people write Markdown, they directly convert it to PDF. As a result, the font size is too small, the titles are not layered, and the code blocks overflow the right boundary, making it look more like a draft. The problem is that Markdown is only responsible for text structure, not layout. If you want a "beautiful" PDF, you need to decide on fonts, headings, paragraph spacing, and page margins individually.

This article is written for readers who need to deliver a thesis, course report, technical manual, or product description. After reading, you will know where to set the style first, which step is responsible for beautification, where problems are likely to occur, and how to check after exporting. The following method does not rely on a certain fixed software. The core idea is: let Markdown maintain a clean structure, use style rules to control the appearance, and finally output PDF.

When converting Markdown to PDF, how to control the style? One sentence conclusion

First organize the Markdown content into a clean structure, then set the layout through style rules, and finally export it to PDF, which is more trouble-free than directly converting and then manually modifying it. Style rules are usually written in the styles section of the HTML, or set in the editor before exporting.

your situation	Recommended practices	reason
All you need is a clean document, and there are no high requirements for the format.	Directly open the Markdown preview page with a browser and print it to PDF	Fewer steps, default style is enough to read
Requires uniform fonts, headings and line spacing	Export to HTML, modify the style rules and then print to PDF	Style and content are separated, and one modification will take effect as a whole.
Document contains code blocks, tables, or formulas	First check the display of these elements individually, and then adjust the corresponding styles.	Such elements are prone to overflow or misalignment
Need to deliver formal documents such as a thesis or report	After the style is finalized, export the PDF and use the PDF editor to organize the pages.	Page numbering, deleting blank pages and other operations are more controllable when placed at the end.
The document needs to be modified multiple times	Keep the Markdown source file and store the styles separately	No need to readjust the layout when updating content

Before you start: Confirm these points first

Thinking about a few things before starting can reduce the number of reworks later.

Determine paper and purpose. Papers are usually A4 with larger margins; manuals or slide documents may use landscape pages. If the paper is different, the font size and margins must be recalculated.
Selected Chinese and English fonts. Chinese text is usually written in Song or Heilong series, and English and numbers can be paired with sans-serif fonts. The font name must actually exist on the device, otherwise it will fall back to the default font when exporting, and the layout will change.
Organize the title hierarchy. A document usually has only one first-level heading as the title, and the rest is divided into second-level and third-level headings. The hierarchy is confusing, and it is difficult to see the structure no matter how detailed the style setting is.
Check for special elements. Code blocks, tables, formulas, and charts are common trouble spots. Confirming their length and width in advance saves time rather than patching them after exporting.
Keep source files. Save the original Markdown text and style rules separately. This way you don’t have to start from scratch if you change the content or change the layout in the future.

Steps to organize Markdown in UniDoc and export HTML

The following steps take the UniDoc web editor as an example. It supports Markdown editing, can handle charts, and can export HTML losslessly. HTML is an intermediate format that is convenient for adjusting styles later.

Open app.unidoc.top, create a new Markdown document, paste the written content into it, or enter it directly in the editing area.
Check the title hierarchy. First-level headings are used for document titles, second-level headings divide large chapters, and third-level headings are used for subsections to avoid skipping levels.
Check whether code blocks, tables, formulas, and charts are displayed normally. If a table has too many columns, consider splitting it into two smaller tables.
After confirming that the content is correct, use the editor's export function, select HTML format, and save the file locally.
Open the exported HTML file with a text editor and set the body font, font size and line spacing in the style section, such as body text size, title font size decreasing, and spacing between paragraphs.
Adjust the background color, padding and font size of the code block, and set the border and header styles for the table. Long lines of code can be set to automatically wrap or allow horizontal scrolling. You need to confirm the wrap effect before exporting PDF.
Open the modified HTML file in the browser and take a look at the overall effect. If you are not satisfied, go back to the style section and continue adjusting until you are satisfied with the layout.

Steps 5-6 require writing a few CSS rules. If you are not familiar with CSS, you can just change the font, font size and line spacing first, and the effect will be significantly improved.

Check each item after completion

After the PDF is generated, don’t rush to deliver it, read it item by item according to the table below.

Check items	How to see	What to do if there is a problem
Is the font correct?	Zoom in to view the Chinese and English characters and confirm that they have not changed to the system default font.	Check whether the font name in the style is spelled correctly and whether the font is installed on the device
Is the title level clear?	Look through the table of contents or scan quickly to see if the title sizes decrease in sequence.	Go back to Markdown to check the title level to avoid skipping levels
Whether the code block overflows	Check the right edge of long lines of code to make sure they are not truncated	Adjust the font size of code blocks or set word wrapping for long lines
Is the form complete?	Check whether the content of each column is clearly visible and whether the table exceeds the page	Reduce the number of columns or split the wide table into two tables
Are formulas and charts clear?	Zoom in to see formula symbols, text and lines in diagrams	Go back to the editor to check the source content and increase the image resolution if necessary
Is paging reasonable?	Check whether the title is alone at the end of the page and whether the table is split by pages.	Adjust paragraph spacing before and after headings, or adjust pages in the PDF editor
Does the page have extra blank pages?	Read it from beginning to end	Use a PDF editor to delete blank pages or go back and adjust page margins

If there is text in the PDF that needs to be modified, you can use the PDF editor on the desktop client to directly change the paragraph text, or you can delete, rotate, rearrange, merge or split pages. The download address is download.omnidoc.top.

📊 Core comparison

There are roughly three common methods, each suitable for different situations. The table below can help you quickly compare.

practice	Suitable situation	advantage	Main disadvantages
Print preview page directly	Temporarily shared notes	Fewer steps, quick to get started	Styles are determined by default rules, and headings and code blocks look ordinary.
Export HTML, modify the style and then print	Reports and manuals that require a unified format	The style can be adjusted repeatedly and the effect is controllable	You need to write a small number of CSS rules, so spend some time upfront.
Export the PDF and then patch it with a PDF editor	A finished product that only requires minor modifications	Changing text or pages is relatively straightforward	When the layout is changed, repairing is time-consuming and is not suitable as the main beautification method.

🎯 Which method is suitable for you?

If you just want to send notes to colleagues, you can just print them without spending time designing styles.
If you want to deliver a report or manual with chapters and tables of contents, it is recommended to determine the font and title level first, and then export the HTML to adjust the layout.
If your document contains a lot of code or wide tables, putting style and pagination checks first can avoid a lot of rework later.
If yours is a paper or formal document, the process will be more secure if you do the page arrangement and signature after the style is finalized.

❓ Frequently Asked Questions (FAQ)

1. If you don’t know how to write CSS, can you beautify the PDF converted from Markdown?

Can. First, only adjust the font, font size and line spacing of the main text. Decrease the font size of the title. If you add the margin settings, the effect will be significantly improved. Complex styles can be added gradually after you become familiar with them.

2. What should I do if the Chinese font is displayed as a box or the default font?

First confirm that the set font has been installed on the device, and check whether the font name in the style is spelled correctly. When fonts are missing, the exported PDF will automatically be replaced with other fonts and the layout will change accordingly.

3. The code block is too long and exceeds the page boundary. How to deal with it?

You can reduce the font size of code blocks or set automatic word wrapping for code blocks. After line wrapping, you still need to preview it in the browser to confirm that the indentation and readability of the code are not affected.

4. Why are formulas or charts blurred in PDF?

Usually the resolution of the source image is not enough, or it is compressed when exported. It is recommended to use higher resolution images and enlarge them for inspection after exporting. Important formulas and charts are checked one by one before delivery.

5. The exported PDF has many pages and some blank pages. Can it be deleted directly?

Can. After generating the PDF, just use a PDF editor to delete excess blank pages. If the blank page is caused by improper pagination position, it will be more fundamental to go back to the style and adjust the paragraph spacing or pagination settings.

📝 Summary

The key to beautifying Markdown to PDF is to organize the structure first, then set the style, and finally check the output. Documents will be much clearer if you separate fonts, heading levels, code blocks, and tables. Exporting HTML and then printing to PDF is a method that takes into account both flexibility and effectiveness.

Open OmniDoc, edit Markdown and export to Word