Web AppIn development

Zenith

Markdown Editor

A precision editor for technical writing. LaTeX, code, and structured documents — rendered at native speed in the browser. Built for people who measure their tools.

Zenith isn't available yet. Follow the build in the Notes.

Built for people who publish, not just write

Researchers & Scientists

Papers with equations, citations, and structured data. Zenith handles LaTeX math, Zotero integration, and BibTeX libraries so you can focus on the work — not the formatting toolchain.

Engineers & Developers

Documentation with real code blocks, diagrams, and frontmatter. Mermaid diagrams, structured metadata, and PDF export that preserves every detail.

Technical Writers

Long-form documents that demand structure and precision. Dual editing modes, live preview, keyboard-driven workflows, and accessibility compliance built in from day one.

research-paper.md

Source

---
title: "Convergence Analysis"
author: "J. Chen"
---

## Methodology

The gradient descent update
rule converges when:

$$\nabla f(x_k) \to 0$$

```python
def train(model, lr=1e-3):
  for epoch in range(100):
    loss = model.step(lr)
```

Preview

J. Chen

Methodology

The gradient descent update rule converges when:

∇f(xₖ) → 0

def train(model, lr=1e-3): for epoch in range(100): loss = model.step(lr)

Editor Preview — Live rendering with scroll sync

Capabilities

Every feature earns its place. Nothing decorative.

Dual-Mode Editing

WYSIWYG and source editing in one tool. ProseMirror for visual writing, CodeMirror 6 for markup — with lossless round-trip between them and a synchronized split view.

LaTeX Math Rendering

Inline and display math with KaTeX. Fast rendering for equations of any complexity. Write \( and get instant feedback.

Citation Management

Import BibTeX libraries, sync with Zotero, and insert citations with autocomplete. Live bibliography preview — references are a first-class feature, not a plugin.

Diagrams

Mermaid diagrams rendered inline — flowcharts, sequence diagrams, Gantt charts, class diagrams, and more. Write the spec, see the result.

Live Preview

Side-by-side rendering with scroll sync. What you write on the left appears on the right — no build step, no delay.

Keyboard-First

Command palette, formatting menu, Vim and Emacs modes, customizable keybindings. Zen Mode for distraction-free writing. Every action is reachable without a mouse.

Export

PDF with proper typesetting and vector-fidelity math and diagrams. Clean HTML output. Consistent results across formats with zero configuration.

Performance

Large documents render without stutter. Web Worker isolation, virtual scrolling, and incremental parsing keep the UI thread clear.

Accessible by Default

WCAG 2.1 AA compliant. Three themes including high-contrast. Full keyboard navigation, screen reader support, and ARIA labeling throughout.

Pricing

Free while in development

Zenith is free to use during the development period. We'll share pricing details well before any changes — no surprises, no bait-and-switch.

Questions? Reach out — we read every message.