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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchFirst identify what is splitting: a text line, a block, or a table row. Then apply page-break-inside: avoid to the smallest element that must remain together, verify the exact wkhtmltopdf binary (including whether it uses patched Qt), and inspect a PDF generated from a minimal fixture. This is a mitigation, not a guarantee: wkhtmltopdf’s own documentation describes the support as partial, and content taller than the printable page cannot fit on one page.
Identify the boundary that is breaking
A rule on the wrong element cannot protect the content you care about. Before changing CSS, open the generated PDF and classify the break.
A text line or paragraph
If characters from one line appear on different pages, the legacy WebKit paginator is making a line-level decision. A rule on a surrounding table row will not fix a paragraph outside that table. Wrap the paragraph or other block in a dedicated element and target that element.
A block such as a card, callout, or heading-plus-paragraph group
Keep the smallest meaningful block together. Applying the rule to the entire document can create large blank areas and make later pagination less predictable.
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A table row
Rows are a common failure point. Apply the rule to the tr and, when necessary, to a wrapper around the table. Inspect the actual PDF for split borders and repeated headers; issue reports show that rows can still split in particular documents and versions.
Check the renderer before changing the document
wkhtmltopdf is built on an old Qt/WebKit stack. The project’s status page says that Qt 4 has not been supported since 2015 and the WebKit bundled with wkhtmltopdf had not been updated since 2012. Different operating-system packages can therefore paginate the same HTML differently.
Record the exact version
wkhtmltopdf --versionSave the complete output with your bug report. Note the operating system, package source, fonts installed on the conversion host, paper size, margins, and whether the output says with patched qt. The historical man page’s partial support for page-break-inside is associated with patched-Qt builds; do not assume every binary has identical behavior.
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Build a production-shaped fixture
Create a short HTML file that contains only the failing shape: the same table columns, representative text length, fonts, images, CSS, page size, and margins. Generate it with the production binary rather than a browser preview:
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Apply a targeted CSS mitigation
Start with the legacy property that wkhtmltopdf documents:
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.keep-together {
page-break-inside: avoid;
}
tr {
page-break-inside: avoid;
}Use the class on blocks that must travel together:
<section class="keep-together">
<h2>Account summary</h2>
<p>The explanatory text belongs with the heading.</p>
</section>Use the narrowest practical selector
- For a card or grouped paragraphs, put
keep-togetheron that card. - For a table, target
trand test the table as a whole. - For a nested cell, protect the cell’s inner wrapper when the row itself is too complex.
- Apply the rule selectively; protecting every element can move content to the next page and increase whitespace.
Do not treat changing a row to inline-block as a proven solution. Issue comments mention display changes, but those reports do not establish a reliable general technique.
Follow a repeatable repair workflow
- Classify the break. Mark whether it occurs inside a line, paragraph, block, cell, or complete row.
- Capture the environment. Record
wkhtmltopdf --version, patched-Qt status, operating system, fonts, paper size, margins, and all relevant command-line flags. - Add one targeted rule. Put
page-break-inside: avoidon the smallest element that represents the unit readers should see together. - Render the fixture. Use the production executable and inspect the PDF, not only the source or an HTML preview.
- Compare side effects. Check blank space, table borders, header repetition, forced breaks, and whether a row moved wholesale to the following page.
- Change the structure if needed. Split an oversized row, divide a long table into sections, or place independently paginated material in separate blocks.
- Retest the complete report. A fix for a small fixture can behave differently when real fonts, images, and long values change the available height.
Table-specific tactics and hard limits
Rows cannot be kept intact when their rendered height exceeds the printable area of a page. No CSS declaration can make a taller row fit. Shorten the content, split it into several rows or sections, or allow an intentional break inside the content.
When a table still splits:
- Reduce unusually long cell content or move detailed notes below the table.
- Divide one very long table into logical tables with their own headings.
- Keep borders and header rows under review; moving a row can expose gaps or change where a repeated header appears.
- Test page-break rules on wrappers as well as rows when the table is nested inside another block.
- Do not add broad rules to every descendant until you have isolated the failing boundary.
Archived issue reports include rows splitting despite page-break-inside: avoid, lines breaking between pages, and page-break-before or page-break-after being ignored for rows. Those are reports from particular versions and documents, not a compatibility guarantee for every build.
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Troubleshoot by symptom
| Symptom | Likely cause | Next action |
|---|---|---|
| A paragraph is divided between pages | The rule is on a table row or an unrelated parent | Wrap the paragraph in a block and apply page-break-inside: avoid to that block. |
| A table row still splits | Partial CSS support, a version-specific defect, or a row too tall for the page | Confirm the binary and patched-Qt status, reproduce with a minimal fixture, then shorten or split the row if it cannot fit. |
| Large blank areas appear | Too many elements are protected, so whole blocks are moved | Remove the rule from broad containers and keep it only on reader-meaningful units. |
| Table borders look broken after the change | The row moved while border drawing or header repetition remained tied to the original pagination | Inspect the PDF, simplify the table structure, and retest with the same production options. |
page-break-before or page-break-after has no effect |
Row-level pagination is not honored by that build or document | Move the break to a wrapper outside the table and verify it in the generated PDF. |
| It works locally but not in deployment | Different wkhtmltopdf package, fonts, Qt patch, page dimensions, or margins | Compare complete version output and rendering inputs; run the same fixture on both hosts. |
| A browser preview looks correct | Browser and wkhtmltopdf use different rendering engines | Treat only the PDF produced by the target binary as authoritative. |
Reliability, performance, and operating cost
For dependable pagination, pin the wkhtmltopdf package used by your service, install the exact fonts required by the report, and keep a regression fixture in source control. Render that fixture after upgrades and whenever CSS, page dimensions, or margins change. Compare page boundaries rather than relying on screenshots of an HTML browser window.
Keep-together rules may increase whitespace because a block is moved to the next page. Very large tables and images also make diagnosis harder: isolate the table first, then add real assets back one at a time. There is no published prevalence or performance statistic that supports predicting how often a given build will fail, so make the decision from your own representative PDFs.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When to replace wkhtmltopdf
If controlled report PDFs remain unreliable after a version-accurate reproduction and structural changes, compare a renderer change on the dimensions that matter to your application.
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| Option named by the project | Best fit to evaluate | Questions to answer before migration |
|---|---|---|
| Continue with wkhtmltopdf | Existing documents whose output is acceptable after targeted fixes | Can you pin the binary, fonts, and fixtures, and tolerate known pagination limits? |
| WeasyPrint | Controlled report generation | Does it reproduce your required HTML/CSS, tables, and page breaks on a shared fixture? |
| Prince | Controlled reports where pagination quality justifies evaluating a commercial renderer | Do licensing and deployment costs fit, and does the output match your requirements? |
| Puppeteer or a wrapper | Sites that depend on dynamic JavaScript | Does the browser-based workflow load the required scripts and produce stable PDFs in your environment? |
The project repository was archived in 2023, as noted in an issue page. Treat maintenance expectations as something to verify for your deployment date, and validate every candidate against the same fixture; no shared comparative test establishes that one replacement will fix every document.
Or skip the browser setup
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Frequently Asked Questions
Are archived issue titles a measurement of how common the defect is?
No. They document particular versions and documents. Use them as evidence that the behavior can occur, not as a prevalence rate or compatibility guarantee.
What should accompany a pagination bug report?
Include the complete version output, patched-Qt status, operating system, fonts, page dimensions, margins, command, minimal HTML/CSS fixture, and the generated PDF showing the boundary.
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