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Use WeasyPrint’s Python API to convert HTML to PDF on Ubuntu, and make sure the font that covers your target Indian-language script is installed and visible to the rendering process. Then verify the selected font with Fontconfig and render a sample containing the actual text you need. No single font or Ubuntu package is established here as a guaranteed fit for every Indian script.
Use WeasyPrint to generate the PDF
WeasyPrint accepts HTML and writes PDF through its Python API. Its current Ubuntu installation requirements include native libraries, so follow the current official installation instructions rather than relying on commands for an older Ubuntu release: WeasyPrint First Steps. The official documentation also covers installing through a distribution package or a virtual environment, depending on your setup.
- Install WeasyPrint using the route and native dependencies documented for your Ubuntu release.
- Confirm the installation with
weasyprint --info, which the documentation identifies as an installation-check utility. - Install or provide a font that covers the script in your document, then confirm that Fontconfig can find it.
- Set the font in your CSS and convert a representative HTML file to PDF.
Basic Python conversion:
from weasyprint import HTML
HTML(filename="input.html").write_pdf("output.pdf")The filename can be replaced with an HTML string or another supported HTML input. For a production application, verify the API and installation details against the current WeasyPrint documentation linked above.
Install and verify a font for the script you need
WeasyPrint uses Pango and Fontconfig to find and use fonts. A font that renders Latin text is not necessarily suitable for Devanagari, Bengali, Tamil, Telugu, or another Indian-language script. Choose a font with coverage for the exact script and characters in your document; the available sources do not establish a particular font family or Ubuntu package as suitable for every script.
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Check what Ubuntu and the renderer can see
Use Fontconfig’s utilities to inspect installed fonts and the family selected for a name or pattern:
fc-list
fc-match "Your Font Family"Replace Your Font Family with the family name you intend to use. Run these checks in the same container, host, and account environment that will generate the PDFs. A font visible in an interactive shell may not be available to a service running under a different user or with a different font configuration.
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Request the font in CSS
For a system-installed family, set it in your stylesheet and include fallbacks:
body {
font-family: "Your Font Family", sans-serif;
}Use the actual installed family name, and do not treat the fallback as proof of script coverage. If the font is supplied as a file, CSS can load it with @font-face. WeasyPrint’s documented setup uses a FontConfiguration for both the stylesheet and the PDF-writing call when fonts are loaded this way.
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from weasyprint import HTML, CSS
from weasyprint.text.fonts import FontConfiguration
font_config = FontConfiguration()
css = CSS(
string="""
@font-face {
font-family: 'DocumentFont';
src: url('/path/to/font-file.ttf');
}
body { font-family: 'DocumentFont', sans-serif; }
""",
font_config=font_config,
)
HTML(filename="input.html").write_pdf(
"output.pdf",
stylesheets=[css],
font_config=font_config,
)Replace the example path with a font file available to the process. Check the current WeasyPrint documentation for the precise supported font formats and API details for your installed release. Confirm that you have the rights needed to deploy the chosen font with your application.
Validate Indian-language text in the resulting PDF
- Prepare a short HTML sample with representative text from every script you need, including the conjuncts, vowel signs, or diacritics present in your real content.
- Run
fc-matchfor the requested family and inspect the PDF after conversion in a viewer. - If text extraction is part of your workflow, check extracted text as well; visual rendering and text extraction serve different purposes.
- Repeat the check using the same Ubuntu image, service account, font files, and configuration used in production.
This is a validation workflow based on WeasyPrint’s documented font matching and missing-glyph guidance, not a guarantee about any particular font’s rendering quality. Test the actual scripts and content rather than relying only on the family name or a Latin-only sample.
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Troubleshoot missing glyphs, squares, or unexpected fonts
| Symptom | Likely check | What to do |
|---|---|---|
| Letters are missing or displayed as squares | The selected font may not cover the characters, or may not be available to WeasyPrint. | Check visibility with fc-list and the selected family with fc-match. Install or provide a font with the needed coverage, then try explicit @font-face loading if appropriate. |
| The requested family is not selected | The family may be misspelled, absent from Fontconfig, or unavailable to the account running the conversion. | Use the family name shown by the system, make the font visible to the rendering process, and rerun fc-match in that environment. |
| It works locally but not in a deployed service | The production image or service account may have different native libraries, font files, or Fontconfig visibility. | Use the same environment for the font checks and PDF generation; ensure the production installation follows the current WeasyPrint instructions for its Ubuntu release. |
| The PDF cannot be generated after installation | WeasyPrint may be missing a required native dependency or may not be installed in the Python environment running the code. | Recheck the current installation instructions and run weasyprint --info in the relevant environment. |
WeasyPrint’s troubleshooting documentation states: “If no character is drawn in the generated PDF, or if you get squares instead of letters, you have to install fonts and make them available to WeasyPrint.” See First Steps for the current guidance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Account for deployment and security
Installation is not just a Python-package decision: the renderer depends on native libraries and on fonts visible through Pango and Fontconfig. Pin and reproduce the environment you deploy, and test the PDF output when you update its Ubuntu base image or rendering dependencies. Exact dependency packages can vary with release, so use the current installation page instead of carrying forward an older release’s package list. An older Ubuntu Jammy manual is available at Ubuntu Jammy’s WeasyPrint manual, but it should not substitute for current installation guidance.
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Do not process untrusted HTML or CSS without addressing WeasyPrint’s documented security risks. Review the current security guidance before accepting user-controlled markup, styles, or resource references.
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