LaTeX Equation Editor with Live Preview, 30+ Symbol Palette, SVG/PNG/MathML Export

Real-world use cases

• Type a homework answer that pastes cleanly into a Word doc with native equations

  Open the editor, pick "Display equation" from the environment dropdown so your formula gets the centered \[...\] treatment. Build the expression with the symbol palette — a fraction, a square root, an integral with bounds. When it looks right, hit "Copy MathML". Switch to Word (Office 365 or LibreOffice Writer), put the cursor where you want the equation, and paste. Word recognizes the MathML payload, drops in a native equation object you can still double-click and edit with Word's own equation editor. No screenshot, no quality loss, no fixed image size — the math stays editable.

• Build a 3x3 determinant for a linear algebra homework and export as PNG

  From the presets dropdown pick "3x3 matrix" — the editor fills in \begin{vmatrix}...\end{vmatrix} with placeholder entries. Replace the placeholders with your matrix values. Switch the preview to dark mode if your homework PDF has a dark theme. Click "Copy PNG", tick "White background" if you're submitting to a portal that wants white-on-white, and the PNG lands on your clipboard at 2x retina. Paste straight into Canvas / Gradescope / a Google Doc.

• Drop a Schrödinger equation into a physics blog post with proper LaTeX rendering

  Pick "Schrödinger (time-dependent)" from presets — the editor pastes the canonical i\hbar \partial_t \Psi = \hat{H} \Psi form. Tweak the notation if your textbook uses different conventions (^ vs hat, partial vs differential). Click "Copy Markdown" and the source comes out wrapped in $$...$$. Paste into your Hugo / Astro / Next.js post — as long as your renderer has KaTeX or MathJax enabled (most do, including GitLab READMEs, Obsidian, Notion math blocks, Jupyter), the formula renders identically.

• Make a textbook-quality figure of Maxwell's equations for slide deck use

  From presets pick "Maxwell's equations" — you get the four-line align block with curl, div, B, E, and the time derivatives in place. Edit any constant naming you prefer (SI vs Gaussian units). Click "Copy SVG" — the SVG hits your clipboard with viewBox intact. In Keynote / PowerPoint / Google Slides, paste directly; the math arrives as a vector graphic that stays crisp at any zoom, and the file size of your slide deck stays small because SVG paths are tiny compared to a PNG of the same math.

• Build a piecewise function for a calculus problem set and ship as Markdown

  Pick "cases (piecewise)" from the environment dropdown — the editor opens with f(x) = \begin{cases}...\end{cases}. Fill in your branches, each with a condition after \\text{ if } ... The preview pane shows the rendered piecewise notation with the brace on the left, all aligned. "Copy Markdown" gives you $$...$$ wrapping that any modern Markdown renderer with math support (GitLab, Obsidian, Notion, Hugo + KaTeX, Jupyter) will render the same way you see it here.

Common pitfalls

• Forgetting to escape backslash in some downstream environments. In LaTeX you write \frac, but if you're pasting into a JSON string or a JavaScript template literal, you need \\frac to keep the single backslash. Our "Copy LaTeX" gives you the single-backslash form (the actual LaTeX source). If you need the doubled form, escape it on the destination side, not here.

• Wrapping inline math with $$...$$ when you wanted inline. Single dollars `$x^2$` is inline (the equation flows with the prose, lower height). Double dollars `$$x^2$$` is display (the equation gets its own centered line, larger). The environment dropdown does the right thing for you; if you're hand-writing the wrapping, pick the one that matches the visual intent.

• Expecting Word to render LaTeX directly. Word doesn't speak LaTeX as a paste source — it speaks MathML. Use the "Copy MathML" button, not "Copy LaTeX", when the target is Word / Pages / LibreOffice. Use "Copy LaTeX" for Notion, Obsidian, GitLab, Jupyter and similar tools that accept LaTeX in their math blocks.

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