If Screenshotlayer’s image omits or mangles Devanagari, first check the page’s Unicode text and font loading, then compare the result with a fresh capture after allowing more time for rendering. Screenshotlayer says its engine can process webfonts and CSS3, but its public documentation does not promise Devanagari-specific shaping or identify the fonts available in its capture workers. The checks below help narrow the cause without assuming a particular failure.
Why Devanagari may look different in a screenshot
A screenshot depends on several steps working together: the page must contain the intended text, the renderer must load a font with the required glyphs, and the browser must shape the script correctly before capture. Dynamic content and cached output can further confuse diagnosis. A normal browser rendering correctly while a Screenshotlayer capture fails narrows the investigation to differences in what the remote renderer receives or loads; it does not, by itself, prove a specific Screenshotlayer defect.
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Screenshotlayer’s FAQ says, in response to whether the API supports graphs, canvas, webfonts, or CSS3, “Yes, our rendering engine is capable of processing all of the above.” That is a general capability statement, not a Devanagari font or shaping guarantee. Screenshotlayer FAQ
Diagnose the source page before changing the API request
- Compare the same URL. Open the exact target URL in a normal browser and compare it with the API image. If Devanagari is broken in both, investigate the page itself first. If only the capture differs, focus on what the remote renderer loads and how long it waits.
- Check the actual text. Confirm that the page contains the intended Unicode text, rather than characters from a legacy font-specific mapping. A page appearing correct in one local environment alone does not establish that its underlying text is encoded as intended.
- Inspect the font stack and glyph coverage. Check the computed font for the affected text and verify that the selected font covers the specific Devanagari characters. Unicode rendering maps character sequences to font glyphs; when a needed glyph or conjunct is unavailable, fallback can affect the result. The Unicode Standard, Version 17.0 describes character-to-glyph mapping and fallback considerations.
- Verify the font request. In the page’s browser context, check that the webfont file loads successfully, including redirects and cross-origin restrictions. Screenshotlayer’s general webfont support makes a hosted webfont worth testing, but does not establish that every font URL or format will load in every capture.
- Allow for script shaping. Devanagari rendering involves more than selecting a font: the renderer must correctly shape character sequences. The W3C Devanagari Layout Requirements provides script-rendering context, but does not describe Screenshotlayer’s implementation.
Test a webfont with Screenshotlayer’s CSS option
Screenshotlayer’s API specification documents css_url as an optional custom stylesheet parameter. If you control a publicly reachable stylesheet, use it to select a known Devanagari-capable webfont for the affected text. For example, the stylesheet could set the relevant element’s font-family to your chosen font followed by appropriate fallback fonts. Make sure the stylesheet and font files are accessible to the remote page renderer; a font installed only on your own computer will not necessarily be available to a hosted capture worker.
Follow the API’s documented request format and add the stylesheet URL as css_url. The specifications also document a delay option and cache controls. See Screenshotlayer API specifications for the parameter details and accepted request format.
Use delay and fresh captures to rule out timing and cache
If the page applies its font or text dynamically, increase the documented capture delay and compare a new capture. There is no single delay value guaranteed to work for every page: allow enough time for the relevant scripts and font request to finish, then adjust based on the observed result. Screenshotlayer’s FAQ also describes a default cache TTL, so make sure you are not comparing a new page state with an older cached image. Use the API’s documented cache controls when you need to distinguish a fresh capture from cached output. Screenshotlayer FAQ
What the public documentation does not establish
The available public materials do not identify the browser version or operating-system font inventory used by Screenshotlayer’s workers. They also do not establish a user-facing way to install or preload fonts on those workers, or provide font-fetch diagnostics. If the font loads on the public page but still fails only in Screenshotlayer, ask Screenshotlayer support whether its current workers can preload or install a font and whether they can expose font-loading diagnostics. Until confirmed, treat those as open questions rather than supported controls.
Or skip the browser setup: use ScreenshotNeo
For a separate screenshot API that returns an image or PDF from one request, try ScreenshotNeo. Its clean-shot pipeline accepts cookie or consent banners and removes more than 60 known consent platforms, newsletter popups, and chat widgets before capture; those steps can be disabled. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and response headers report the page verdict and billing status. ScreenshotNeo also offers an MCP server with screenshot, page-info, and PDF tools for AI agents. It does not establish that any particular Devanagari rendering issue will be fixed, so test your target page.
Example cURL request:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo API documentation for request options. The free plan includes 1,000 screenshots per month with no card; paid plans start at $5 for 3,000. Sign up for ScreenshotNeo free.
Common failure patterns and next checks
| What you see | Likely area to check | Next step |
|---|---|---|
| Broken text in both browser and screenshot | Source text or page font setup | Verify the Unicode content, computed font, and glyph coverage. |
| Browser is correct; screenshot has missing or substituted glyphs | Remote font loading, fallback, or shaping | Check font requests and stylesheet accessibility; then ask Screenshotlayer about worker fonts or diagnostics if needed. |
| Text is correct in some captures but absent in others | Dynamic loading or capture timing | Test a longer documented delay and confirm the font and content have loaded before capture. |
| Changing the page appears to have no effect on the image | Cached output may be obscuring the comparison | Use documented cache controls to request a fresh result. |
| Font works locally but not in the hosted capture | Different renderer environment or inaccessible font resource | Confirm the font is publicly fetchable from the page context; local installation does not establish worker availability. |
Frequently Asked Questions
Does changing the URL encoding alone fix missing Devanagari?
Not necessarily. Encoding is only one part of the rendering chain; font coverage, font delivery, shaping, timing, and cache can also matter.
Can I install a Devanagari font on my computer for Screenshotlayer to use?
A font installed on your computer is not necessarily available to Screenshotlayer’s hosted workers. Its public documentation does not establish a worker-side font installation control.
Quick Recap
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