OmniDocHow to convert Markdown table to PDF online without messing up the version
After converting a wide table or a Markdown table with many columns into PDF, columns are often squeezed, text is arranged vertically, and headers and data are separated across pages. This article explains how to narrow the table before conversion, select the page direction during conversion, and check page by page after conversion.
Key points of this article
- When the number of columns exceeds 6 or the cell text is long, it is easier to read by deleting secondary columns and merging short columns than by reducing the font size.
- Move long paragraph descriptions out of cells and into paragraphs below the table, which can reduce cross-page problems caused by too high row heights.
- Leave a blank line before and after the Markdown table to prevent the table from adhering to the previous text, resulting in misaligned rendering.
- When the table must retain all columns, use landscape page conversion instead, or rotate the page in the PDF.
- After conversion, check the column width, header position and cross-page status page by page. If any problems are found, return to the source file to modify it and convert again.
If you write an eight-column data table in Markdown, or a certain column contains long explanatory text, there are three common situations after converting it directly to PDF: the right columns are squeezed into a very narrow strip, and the text is arranged vertically one word at a time; the table is cut off just at the end of the page, the header remains on the previous page, and the data runs to the next page; or the entire table exceeds the right edge of the page, and the following columns are invisible. Most of these problems come from conflicts between table width and page size, rather than errors in the conversion itself.
This article is written for readers who need to export technical notes, experimental records or report drafts from Markdown to PDF. After reading, you will know: how to narrow the table before conversion, what page orientation to use during conversion, how to check page by page after getting the PDF, and how to remedy problems when problems are found. The following method is applicable to most scenarios where Markdown tables are converted to PDF online. The specific settings will depend on the tool you use.
The table is too wide or has too many columns. How can I convert it to PDF without messing it up? One sentence conclusion
First reduce the width occupied by the table in the source file, then choose the appropriate page orientation conversion, and finally check it page by page; do not adjust the font size to a small size right away.
| your situation | Recommended practices | reason |
|---|---|---|
| The number of columns should not exceed 5, and the cell text should be shorter | Convert directly and read it page by page | The table width is usually already within the page and does not need to be changed. |
| Number of columns 6 to 8, mainly numbers and short words | Delete secondary columns such as internal numbers, or merge adjacent short columns | Reduce horizontal occupancy and make it easier to read than reducing font size |
| A certain column is a long description | Move the description to the paragraph below the table, leaving only keywords or values in the cells | Long text will raise the height of each row, and tables will easily cross the page. |
| The table exceeds half a page and easily spans two pages | Split into two tables, each retaining the primary key column and necessary data | After splitting, each table is more likely to fall completely on one page. |
| All columns must be retained and the table is wide | Use landscape page conversion, or rotate corresponding pages in PDF | Landscape pages provide more width, but table content remains unchanged |
Before you start: Confirm these points first
Determining the condition of the form before taking action can save you a lot of rework.
- The purpose of the form is to print and read or archive for verification. When printing and reading, priority should be given to ensuring readability, and deleting columns and splitting tables is more appropriate; when archiving and checking, all data should be retained, and horizontal pages can be used instead.
- Whether the content of each column is necessary. Internal numbers, repeated timestamps, and comments that are only useful in the source file often have no reading value in the PDF. After deleting them, the table will be more compact.
- Whether the Markdown syntax of the source file is correct. There must be complete vertical lines at the beginning and end of each line, and there must be a dividing line below the table header. Syntax errors will cause the table to become ordinary text during conversion, and the column structure will disappear directly.
- Whether the document contains scanned content. If the table comes from scanned paper materials, it is not editable Markdown and needs to be recognized and then sorted. In this case, the following steps can only be used for the recognized text.
- If copies in other formats are required. If you want to modify it later, it is recommended to keep the Markdown source file and use the PDF only as a reading and distribution version.
Steps to convert Markdown table to PDF online
- Open the Markdown source file, count the columns of the table one by one, and mark tables with more than 6 columns and tables with more than two lines of text in cells.
- Delete columns that are unnecessary for reading, such as internal numbers and repeated timestamps; merge adjacent short columns that can be merged into one column, and use slashes or dashes to separate values.
- Move the longer description text out of the cell and rewrite it into a paragraph or a list below the table. Only keep keywords or values in the cell.
- Check whether there is a blank line before and after the table, and confirm that the vertical lines at the beginning and end of each line are complete. This step can prevent the table from adhering to the previous text, causing rendering misalignment.
- Open the organized content in the UniDoc web editor (app.unidoc.top) and confirm that the number of columns and text in the table are consistent with the source file. If there are any problems, correct them here first.
- Send the organized Markdown to the online conversion tool to convert it to PDF. If the tool offers page orientation or paper size options, select landscape for wider tables.
- Download the generated PDF, open it with the PDF editor of the OmniDoc desktop client, and view it page by page. If the table on a certain page is still narrow, you can use the page rotation operation to display it horizontally.
- If the table is truncated at the end of the page, go back to the source file, insert a page break before the table (the specific syntax depends on the tool used), or streamline the paragraph before the table so that the entire table falls on the next page, and then convert again.
Check each item after completion
Do not send the PDF directly after it is generated. Check it item by item according to the table below.
| Check items | How to see | What to do if there is a problem |
|---|---|---|
| The number of columns is consistent with the source file | Count the number of columns in each table against the source file | When a column is missing, check whether the vertical lines in the row are complete, and then convert again. |
| Narrow columns are not vertically aligned word by word | Zoom in to see the column with the most content | Shorten this column of text or split it into two columns |
| The header is not isolated at the bottom of the page | Go to the bottom of each page | Adjust the pagination position, or move the table as a whole to the next page |
| Cross-page table has duplicate headers | View the top of the table continuation page | If the tool does not support it, split it into two tables and place them separately. |
| Numbers, units and symbols are not lost | Randomly check a dozen values and units | Modify the source file and then convert again. Do not directly change the PDF numbers. |
| Text content is accurate | Check key data against source documents | The content converted by the machine requires manual verification item by item, especially numerical values and proper nouns. |
If you need to confirm the differences before and after modification, you can use the PDF comparison function of the OmniDoc desktop client to compare the two versions of the PDF and quickly find the changed pages.
❓ Frequently Asked Questions (FAQ)
1. The table is too wide. Is it possible to reduce the font size?
It can put the content down, but if the font size is too small, it will affect the reading and printing effect. It is recommended to delete secondary columns and merge short columns first, and then consider horizontal pages when it cannot be reduced.
2. Can tables in scanned PDFs be processed using these methods?
It cannot be applied directly. The tables in the scans are images and need to be recognized into text through OCR first. OmniDoc's PDF editor provides the OCR function. The identified results still need to be checked item by item and then organized according to the above method.
3. There are mathematical formulas in the table. Will it be messed up after conversion?
The display effect of the formula depends on the way the source file is written and the tool used. After conversion, you need to check whether the formulas are complete one by one. UniDoc web editor supports formula editing, and you can correct them there before converting.
4. When choosing an online conversion tool, what should you pay attention to if it is free?
Pay attention to the file size limit, whether the output PDF is watermarked, whether the formatting retains the table structure, and the privacy policy of the uploaded file. It is more reliable to try the conversion first with a sample document with a wide table than to read the promotion.
5. I have to convert it again after every modification. Is there any way to save trouble?
Use the Markdown source file as the main modification entry point, and PDF only as the output result. Checking with the same set of checklists after each modification can reduce rework.
📝 Summary
Wide tables and multi-column tables are common layout difficulties when converting Markdown tables to PDF online. The solution is to first narrow the table, then select the appropriate page direction, and finally check page by page. Following this process, most tables can remain readable, and in the remaining few cases, problems can be quickly located.
