Find and copy math symbols & LaTeX — anywhere you read
MathCast is a Chrome extension for papers, lectures, blogs, and PDFs. Search 566+ symbols with a spotlight, preview with KaTeX, and copy Unicode or LaTeX in one keystroke.
Spotlight search (Alt+Shift+S), context-aware selection, KaTeX preview, multi-format copy, and inline /sum → ∑ substitution — UI in Korean, English, and Japanese.
Key features
Spotlight search
Press the shortcut (default Alt+Shift+S, customizable in the popup) to search a dictionary of 566+ symbols.
- Natural language: Pearson, derivative, softmax, …
- Symbol names and LaTeX commands
- Fast fuzzy search from anywhere on the page
Context-aware
Select text, hit the shortcut — your selection fills the search box automatically.
- Works on web pages and Chrome’s built-in PDF viewer
- Great when you see a symbol but don’t know its name
KaTeX preview
See how a formula looks before you copy — no surprises in your document.
Multi-format copy
- Enter — copy Unicode symbol
- Shift+Enter — copy LaTeX
- Ctrl+Enter — replace selected text in place
Inline substitution
Type /sum then Space → ∑ and similar shortcuts for common symbols while writing.
Languages
Korean · English · Japanese — switch in the extension popup.
Typical workflow
From reading to copying in seconds:
- Reading a paper or PDF — spot an unfamiliar symbol
- Select it (optional) and press Alt+Shift+S
- Search by name, natural language, or LaTeX
- Preview with KaTeX, then Enter / Shift+Enter / Ctrl+Enter to copy or replace
Perfect for
- Students and researchers writing STEM papers and assignments
- Anyone reading math-heavy web pages or PDFs
- Writers who frequently look up LaTeX and Unicode symbols
Privacy
- No data sent to external servers
- Only shortcut and language preferences may sync via chrome.storage.sync
- Symbol dictionary ships inside the extension — lookups stay local
Install MathCast and stop hunting for that one symbol in a PDF tab maze.
Chrome Web Store URLs
Register these paths in the Chrome Web Store listing for MathCast.
Store listing
Visitors are redirected by country (KR/JP) or browser language to /mathcast/en, /ko, or /ja.
- Homepage URL
- https://www.eajiai.com/mathcast/
- Support URL
- https://www.eajiai.com/mathcast/support
- Privacy policy URL
- https://www.eajiai.com/mathcast/privacy