latexci
The tools Overleaf forgot: free, browser-based LaTeX utilities, live at
latexci.com.
- Live preview with PDF export, diff of two LaTeX versions, Word to LaTeX,
table generator, symbol finder (350+ symbols), 28 templates, CV builder,
and a BibTeX suite (DOI, arXiv, ISBN, PubMed, ORCID to BibTeX).
- Every tool is free; there is no paid plan.
- PDF export and Word to LaTeX need a one-click Google sign-in. All other
tools work without an account.
- Saved documents stay in the browser (
localStorage). Signed-in users get a
small private record in Vercel Blob (Paris, EU), erasable with
"Delete my data" in /dashboard.
Stack
Next.js 16 (App Router, React 19, TypeScript), deployed on Vercel. CodeMirror
editor, KaTeX preview, diff, mammoth (Word import), Vercel Blob and
Vercel Analytics. No database. PDF compilation goes through YToTech
LaTeX-on-HTTP (app/api/compile-pdf).
Scripts
npm run dev # local server on http://localhost:3000
npm run build # production build
npm run test # unit tests (Vitest)
npm run lint # ESLint
Environment variables
| Variable | Required | Purpose |
|---|
GOOGLE_CLIENT_ID | for sign-in | Google OAuth client ID |
AUTH_SECRET | for sign-in | Signs the session cookie |
BLOB_READ_WRITE_TOKEN | optional | Vercel Blob store latexci-users (injected by Vercel) |
ADMIN_EMAILS | optional | Comma-separated admin emails (Users table + CSV in /dashboard) |
NEXT_PUBLIC_SITE_URL | optional | Canonical site URL |
OTEL_EXPORTER_OTLP_ENDPOINT | optional | Turns on OpenTelemetry tracing (instrumentation.ts); unset = off, nothing loaded |
OTEL_EXPORTER_OTLP_HEADERS | optional | OTLP auth header, e.g. Authorization=Basic%20<base64> (Grafana Cloud) |
Without GOOGLE_CLIENT_ID and AUTH_SECRET, sign-in is off and PDF export
and Word to LaTeX are open to everyone, which is convenient for local work.
Docs
docs/google-signin.md: sign-in, user records,
environment setup.CLAUDE.md / AGENTS.md: conventions for contributors and agents.
Deploy: vercel deploy --prod --yes.
License
MIT, see LICENSE. Bundled fonts (Computer Modern Unicode, STIX Two Math) are under the SIL Open Font License 1.1.
