Choose wkhtmltopdf when you need a PDF document; choose wkhtmltoimage when you need a raster image. Both are headless command-line tools from the wkhtmltopdf project and use Qt WebKit, so the main distinction is the output and the workflow around it—not a different rendering engine.
What differs between wkhtmltoimage and wkhtmltopdf?
| Tool | Output and best fit | Workflow notes |
|---|---|---|
wkhtmltopdf |
A PDF, suited to document workflows such as saving or distributing a page as a document. | Can assemble a document from webpage, cover, and table-of-contents objects. Its command options can be global or set per object. |
wkhtmltoimage |
An image, suited to a raster capture workflow. | The project describes its output as various image formats; it does not publish a complete authoritative format list. |
Both are described by the project as headless tools, so they do not require a display service. They share the Qt WebKit lineage, but that does not mean their output is interchangeable: decide based on the artifact your next step needs.
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When should you choose each tool?
Choose wkhtmltopdf for a document
Use wkhtmltopdf if the result should be a PDF that can be handled as a document, or if you need to combine a webpage with a cover or table of contents. The project overview demonstrates the basic form with wkhtmltopdf http://google.com google.pdf. See the version-matched command manual for the full PDF option set.
Choose wkhtmltoimage for an image
Use wkhtmltoimage when the receiving workflow expects an image rather than a document. Check the installed build’s help and documentation for its supported formats and options; the PDF manual does not establish every wkhtmltoimage option.
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What to know about rendering and compatibility
The shared Qt WebKit base matters if the page relies on modern or dynamic JavaScript. The project status page recommends considering Puppeteer or a wrapper when converting a site that uses dynamic JavaScript. That is the project’s guidance, not a comparative performance test. For HTML report generation, it suggests WeasyPrint or the commercial tool Prince; the cited project material does not establish current comparative performance, licensing, or support terms for those alternatives.
Builds can also differ. The project download page says some features require its patched Qt, and distribution packages may omit those patches. Consequently, commands and behavior can vary with the platform and package source. Record the actual tool version and build when diagnosing a discrepancy, rather than assuming every package behaves identically.
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Maintenance and security considerations
The project’s downloads page lists 0.12.6 as its stable release and dates it June 11, 2020. GitHub marks the source repository archived on January 2, 2023. These are facts about the cited project materials; they do not establish that every downstream package contains the same build.
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The project warns against processing untrusted HTML and specifically calls for sanitizing user-supplied HTML and JavaScript. Treat this as a significant server-side trust-boundary concern, not as a complete security review: do not feed arbitrary user content to the renderer simply because it has been sanitized. The status page discusses the age and security implications of its Qt/WebKit base, including QtWebKit’s deprecation in 2015 and removal from Qt 5.6 in 2016.
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ScreenshotNeo is the alternative to try first when you need web-page screenshots through an API or an MCP server rather than installing and maintaining a local renderer. It accepts cookie and consent banners like a visitor and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; each cleanup step can be turned off. Bot checks and CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and responses identify the page verdict and billing status in headers. Its MCP server provides take_screenshot, get_page_info, and capture_pdf tools for AI agents and MCP clients.
One GET request can return a PNG, JPEG, WebP, or PDF. For a WebP screenshot, use this cURL example; see the ScreenshotNeo API documentation for options and response details.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpScreenshotNeo includes 1,000 screenshots per month free without a card; paid plans start at $5 for 3,000 screenshots. Sign up for the free plan.
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Frequently Asked Questions
Do wkhtmltoimage and wkhtmltopdf use different rendering engines?
No. The project describes both as using Qt WebKit; they differ principally in the artifact they produce.
Does the wkhtmltopdf manual document every wkhtmltoimage option?
No. It is the PDF command manual. Check the installed image tool’s own help or version-matched documentation for its options.
Can I safely render HTML submitted by site visitors on a server?
The project explicitly warns against using wkhtmltopdf with untrusted HTML and JavaScript. Do not treat sanitization alone as proof that arbitrary user content is safe to render.
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