If Hindi text is missing or appears as empty boxes in a Playwright screenshot, the browser runtime probably cannot access a font with Devanagari glyphs. Install a suitable font package in the same Ubuntu environment that runs the browser, then rebuild that environment if it is a container and test the page there. A font installed only on your host will not automatically be available inside Docker or a separate CI runner.
Install a Devanagari font where Playwright runs
Hindi is written in Devanagari, so the browser needs access to a font that covers that script. Ubuntu 22.04 (Jammy)’s package listing identifies fonts-deva as providing Lohit and Samyak TrueType fonts for Devanagari. Package availability and names may differ on other Ubuntu releases; check the package index for your release before using the command.
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- Identify the environment that launches the Playwright browser: local Ubuntu, a Docker container, or a CI runner.
- On an Ubuntu 22.04 system where you have package-install permissions, install the package with
sudo apt-get update && sudo apt-get install -y fonts-deva. - If the browser runs in Docker or CI, add the font installation to the image or runner setup that hosts the browser. Rebuild or update that runtime before testing.
- Render a page containing representative Hindi text using the same browser, image, and runner as your screenshot job.
See the Ubuntu Jammy package listing for fonts-deva for the release-specific package details.
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| Where the browser runs | Where to install the font | What to do after the change |
|---|---|---|
| Directly on Ubuntu | On the Ubuntu system running Playwright | Run the screenshot test again in that environment. |
| Docker container | In the browser container image, not only on the host | Rebuild the image and rerun the screenshot job. |
| CI runner | In the runner environment or the image used by the job | Update the runner or image, then test in the CI job itself. |
Playwright’s Docker guidance describes browser system dependencies, custom images, and remote browser execution. Its documented image bases include Ubuntu 22.04 Jammy and 24.04 Noble; image tags and details can change. Follow the instructions for the image and release you actually use rather than assuming a package listing for Jammy applies to Noble or another version.
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Keep the Playwright package and browser image aligned
If you use a Playwright Docker image, pin its version and keep it aligned with the Playwright version installed in your project. The official guidance warns that a mismatch can prevent Playwright from locating browser executables. Installing the font in the correct container will not fix a separate browser-version mismatch.
The Playwright project’s Jammy Dockerfile runs playwright-core install-deps before installing browser binaries, illustrating that browser dependencies belong in the image build. Add the Devanagari font package to the image configuration for the runtime that performs your captures.
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Verify Hindi rendering in the actual screenshot runtime
- Use a test page with Hindi text representative of the content that renders incorrectly.
- Run it through the same Playwright browser and execution environment as the production screenshot. Do not rely solely on a test from your host if production runs in a container or CI.
- Inspect the resulting image for missing glyphs or fallback characters. Confirm that the intended font is available to the browser in that runtime.
- If it still fails, investigate font loading and browser rendering in that same environment. There is no single universal second-stage diagnosis established for every remaining rendering problem.
Troubleshooting
- Hindi works locally but not in Docker: The font may exist on the host but not in the container. Install the Devanagari font package in the browser image, rebuild it, and test again inside the container.
- The package name or install command does not work: The cited package details are for Ubuntu 22.04 Jammy. Check your target Ubuntu release’s package index and use a package that provides Devanagari coverage.
- The font is installed but Playwright cannot find its browser: Check that the project Playwright version matches the pinned Docker image version, as recommended by Playwright’s Docker documentation.
- Hindi still renders incorrectly after the change: Confirm font availability and loading in the actual runtime, then examine browser rendering there. The cause may be something other than a missing system font.
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