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To convert a LaTeX equation to SVG in a browser, configure MathJax with TeX input and SVG output, render the expression, wait for conversion to finish, and download the resulting SVG markup. For a standalone file, use MathJax’s local SVG font cache; keep the original TeX alongside the image because SVG glyphs are paths, not copyable text. Browser-side rendering does not automatically mean the workflow works offline: the page must have the renderer and any needed fonts or extensions available locally.
What this workflow does—and what it does not
MathJax can accept TeX mathematics and produce SVG in a browser. This is a formula-rendering workflow, not a compiler for arbitrary complete LaTeX documents. A formula editor can offer a focused expression field without supporting document structure, packages, or the full LaTeX environment; LaTeXLive describes that distinction in its documentation.
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MathJax describes SVG output as relatively self-contained and suitable for saving as an independent image, while noting that some circumstances use CSS. See MathJax’s SVG Support documentation. “Self-contained” is not a guarantee that every downstream editor will render every expression identically, nor does it mean that the web app itself works without a network connection.
Set up TeX input and SVG output
In a MathJax application, select a TeX input component and an SVG output component in the component configuration. MathJax’s output-format overview describes the available processors and how output formats are selected. The exact configuration and loading method depend on how the application includes MathJax; the component choice is the key requirement for this workflow.
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Accept a math expression as the input. Do not label the field as a full LaTeX document editor unless the application actually supports document-level LaTeX features. Commands, extensions, and fonts available to a particular implementation may differ, so validate the expressions the intended users need.
Render, then export the SVG
- Enter the TeX expression. Preserve the source exactly as entered, including any delimiters your application expects.
- Convert it with MathJax’s asynchronous TeX-to-SVG interface. The official interactive TeX input and SVG output demo uses
tex2svgPromise(). Wait for the promise to resolve before enabling export; MathJax may need to load extension or font data. - Take the generated SVG markup and save it as a file. A browser app can provide a download action for that markup. This is implementation guidance: the cited documentation demonstrates conversion and SVG output, not a complete tested download implementation.
- Keep the TeX source with the SVG. Store it in the project, a companion text file, or another durable record. The SVG output uses paths for glyphs, so the equation cannot be copied back out as ordinary text.
In an application that exports standalone equations, inspect the generated markup before relying on the file elsewhere. The SVG should contain the glyph path definitions it needs rather than depending on definitions elsewhere in the original page.
Choose the SVG font cache for the way you will use the file
MathJax’s SVG output options distinguish local and global font caching. Set svg.fontCache to local when each equation must work as an independent image: the paths are included within that equation’s SVG. A global cache can reduce repeated path data across a page, but an individual exported equation then depends on shared page elements. The behavior is documented in MathJax’s SVG Output Processor Options.
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- Standalone files or sharing equations individually: prefer the local cache and check that path definitions are present in the exported SVG.
- Many equations kept together on one page: a global cache may save space across repeated glyphs, but do not treat each equation’s SVG as independently portable without its shared definitions.
Know when SVG is the right output
MathJax also documents CommonHTML and serialized MathML output alongside SVG. SVG is the fit when the deliverable is a scalable image or needs vector editing. CommonHTML is browser-layout output, while MathML is structured mathematical markup. Because SVG glyphs are paths rather than text characters, retain TeX—and, where the destination needs it, suitable semantic markup—when copyability, accessibility, or downstream mathematical processing matters. The format choices and SVG limitation are covered in the MathJax output overview and SVG Support documentation.
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Check offline behavior instead of assuming it
“Browser-local” can mean that the conversion runs in the browser; it does not establish that the page can render without internet access. MathJax may load extensions or font data asynchronously, and a hosted editor may also fetch its application assets. The interactive demo notes that extensions and font data may need to load during conversion.
- Make the renderer and required assets available locally if offline use is a requirement.
- Disconnect from the network and load the actual application, rather than testing only a previously open page.
- Render the expressions users will rely on, including any that require extensions or special fonts.
- Confirm that conversion completes and the downloaded SVG works after it is moved outside the application page.
The cited references do not certify a particular offline package or guarantee offline operation for a specific editor. Test the exact implementation and its required expressions.
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