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To render Chinese, Japanese, Korean, Arabic, Hebrew, Thai, or other non-Latin text in headless Chrome, install fonts that contain the required glyphs in the same Linux environment that launches Chrome. Headless mode does not supply missing fonts, and a CSS font-family declaration cannot add glyphs that are absent from the available fonts. Then check the page’s language and font selection, and inspect an image or PDF produced in the production-like environment.
Why non-Latin characters go missing
When Chrome has no suitable glyph for a character, the rendered result may show a replacement box or another fallback mark instead of the intended text. The browser can still start and render the rest of the page: this is a font-coverage or font-selection problem, not necessarily a Chrome launch problem.
Headless Chrome still needs fonts. Puppeteer’s troubleshooting documentation includes a Docker example that installs Chrome and fonts to support major character sets, including Chinese, Japanese, Arabic, Hebrew and Thai. That package list is an example, not a universal Unicode bundle; the scripts and particular characters in your pages determine what coverage you need.
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Diagnose the rendering environment first
- Record the runtime. Note the Linux base image, Chrome and Puppeteer versions, and the launch mode. A host machine may have fonts that are missing from the container.
- Check whether intended web fonts loaded. If the page uses a hosted font, wait for it to load before capture. A failed font request or a font without the needed glyphs can leave Chrome relying on system fallback.
- Inspect language and font selection. Check the document’s language metadata and the element’s computed
font-family. Chrome’s font settings documentation explains that generic families map to corresponding settings and that a declared page language can affect script-specific font selection; without a language, Chrome uses the default or global script setting. - Check installed system fonts. Verify that the container has fonts covering the scripts represented in the page. Install or bundle fonts in the image used to launch Chrome, not merely on your workstation.
- Render a representative fixture. Capture a small page containing the actual scripts and representative characters your application needs. Use the same image, launch mode and capture path as production, and inspect the resulting screenshot or PDF.
This sequence separates missing glyph coverage from language-sensitive font choice and from a web font that never loaded.
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Install fonts for the scripts you use
Puppeteer’s Debian-style Docker example names fonts-ipafont-gothic, fonts-wqy-zenhei, fonts-thai-tlwg, fonts-kacst and fonts-freefont-ttf among packages intended to support major character sets. Treat those names as a starting example: package names, availability and coverage vary by distribution, and the documented group is not guaranteed to cover every language or character.
For a Debian-family image where those package names are available, the installation step can look like this:
RUN apt-get update && apt-get install -y --no-install-recommends
fonts-ipafont-gothic
fonts-wqy-zenhei
fonts-thai-tlwg
fonts-kacst
fonts-freefont-ttf
&& rm -rf /var/lib/apt/lists/*Adapt the package list to the scripts you actually render and to the package manager and repositories in your base image. If your distribution does not provide one of these package names, look for an available font package with the required coverage rather than assuming the example will install unchanged. Rebuild the image after changing font packages, then run the same fixture through the rebuilt image.
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System fonts or page-delivered fonts?
A page-delivered web font can provide the intended typography when it loads and includes the required glyphs. System fonts provide fallback coverage when a requested font does not cover a character. Either way, verify what Chrome actually used: a family name in CSS is a request, not proof that the font exists or contains the glyph.
Set language and font choices deliberately
Use accurate language metadata where you control the page. For example, a document might declare lang="ja" for Japanese or lang="ar" for Arabic. Set language at the relevant element as well when a page contains passages in different languages. Use a font stack appropriate to the content, but do not rely on the stack alone if the runtime lacks the necessary fonts.
When troubleshooting, inspect the rendered element’s computed style and the page’s language value, then compare the output after changing one variable at a time: font loading, language metadata, or installed font coverage. Chrome can choose fonts in a language- and script-sensitive way, so the same generic family need not yield identical selection for every language.
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Run Puppeteer with the same configuration you deploy
Keep a minimal fixture and run it using the same Puppeteer launch mode as production. Current Chrome has unified headless and headful modes. Chrome documents that since version 132.0.6793.0, the old Headless mode is available only as the standalone chrome-headless-shell binary. Puppeteer distinguishes headless: true, headless: 'shell' and headless: false; record which one you use because the browser binary and packaging can differ.
const puppeteer = require('puppeteer');
(async () => {
const browser = await puppeteer.launch({ headless: true });
try {
const page = await browser.newPage();
await page.goto('https://example.com', { waitUntil: 'networkidle0' });
await page.screenshot({ path: 'render.png', fullPage: true });
} finally {
await browser.close();
}
})();Replace the example URL with a page you control that contains the characters you need to render. If the page depends on a web font, wait for that font or its relevant content to become ready before capturing. A successful browser launch and screenshot call only establish that capture completed; inspect the output itself for missing or substituted glyphs.
Distinguish font problems from Chrome startup failures
If Chrome does not start, investigate Linux shared-library dependencies separately from font coverage. Puppeteer’s Linux troubleshooting guidance gives ldd chrome | grep not as a way to look for missing shared libraries. The exact Chrome dependencies vary by distribution, and dependency lists can become outdated or depend on what is already installed. Use current guidance for your browser build and base image.
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Do not add --no-sandbox as a font workaround. Puppeteer recommends running Chrome with sandboxing; its troubleshooting guidance describes disabling the sandbox only for trusted content and strongly discourages running without it. A missing-glyph issue should be addressed through font coverage and selection, not by weakening browser isolation.
Troubleshooting common failures
| Symptom | Likely cause | What to check or change |
|---|---|---|
| Chrome launches, but some characters appear as boxes | The active font or available system fonts lack those glyphs. | Identify the scripts and characters, add suitable font coverage to the runtime image, rebuild, and rerender the fixture. |
| Text falls back to an unexpected typeface for one language | Language-sensitive selection, a generic-family setting, or missing preferred font. | Check document and element language metadata, computed font-family, and the fonts installed for that script. |
| A page works on a laptop but not in the container | The host has fonts or other dependencies absent from the container. | Inspect the container’s installed fonts and run the fixture inside the deployed image. |
| The intended web font is specified but not visible | The font request may have failed, not completed before capture, or may lack the glyphs. | Verify that the font loaded before capture and that it covers the characters in question; then check system fallback. |
| Chrome exits before producing a page | A launch dependency or environment issue, rather than necessarily a font issue. | Use the documented ldd chrome | grep not check and investigate dependencies for the exact distribution and browser build. |
| Only the old shell launch behaves differently | The shell binary and current unified headless Chrome are distinct launch choices. | Record the selected Puppeteer mode and Chrome binary, and reproduce with the same mode used in production. |
Keep screenshots and PDFs reproducible
- Pin the environment you validate. Record the base image, browser version, Puppeteer version, font packages and launch mode so a later image rebuild does not silently change rendering.
- Test the real character set. A page containing a few common characters is not evidence that every language or rare glyph is covered. Include representative content from each script your application needs.
- Validate the final artifact. Inspect the generated screenshot or PDF from the runtime image; a successful navigation or completed capture does not prove text rendered correctly.
- Keep font and browser errors distinct. Missing shared libraries prevent or disrupt browser startup; missing or unsuitable glyph coverage affects text after Chrome can render the page.
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Frequently Asked Questions
Does headless Chrome need fonts installed?
Yes. Headless Chrome needs access to fonts with the glyphs it must render, just as other Chrome modes do.
Does installing Puppeteer’s example font packages guarantee complete Unicode coverage?
No. The example is aimed at major character sets, and coverage depends on the actual characters, packages and Linux distribution.
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Should I use –no-sandbox to fix missing characters?
No. Sandbox settings do not add font coverage; investigate the fonts and font selection instead.
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