Welcome to xyzEditor

A fast, online Markdown editor with real-time live preview. Enjoy native LaTeX & AsciiMath, secure Markdown to PDF conversion, and the absolute privacy of a local-first workspace.

Getting Started

Sections

Unlike traditional editors, xyzEditor uses a section-based approach. This allows you to break large documents into manageable pieces. (Note: If you prefer a simple, single-document workflow, you can hide the section bar entirely using the toggle in the top right.)

  • Create: Click the button in the secondary toolbar to add a new section.
  • Navigate: Click any tab in the section bar to switch context.
  • Reorder: Use the and buttons to move the current section left or right.
  • Delete: Remove unwanted sections with the button.

File Management (Local-First)

Because xyzEditor is a local-first application, your data never leaves your browser. Manage your documents securely:

  • Filename:Set your document's name in the top bar. This title is automatically used for downloads and saving.
  • New: Start a fresh document with . Be sure to save your current work first!
  • Save: Click Saved (Ctrl + S) to save your work automatically to your browser's local storage database. No servers involved.
  • Upload: Open an existing Markdown file from your computer using (Ctrl + O). You can also drag & drop a file directly into the window.
  • Download: Export your current document as a standard .md file using (Ctrl + Shift + S).

Markdown Features

Full support for GitHub Flavored Markdown (GFM) and structured writing.

Essentials

StyleSyntax
Bold**bold**
Italic*italic*
Strike~~strike~~
Code`code`
Link[link](#)

Structure

  • Headers: # H1, ## H2, etc.
  • Lists: - bullets, 1. numbered.
  • Quotes: > for blockquotes.

Extensions

Task Lists

  • Done
  • Pending

Code Highlighting

function greet() {
  console.log('Hello World!');
}

Alerts
Use > [!NOTE], TIP, IMPORTANT, WARNING, or CAUTION.

TIP

Alerts render with distinct colors and icons.

Maths & Science

Professional mathematical notation using LaTeX and AsciiMath.

LaTeX Equations

The standard for professional typesetting of complex formulas.

Inline Example
$ax^2 + bx + c = 0$

ax2+bx+c=0ax^2 + bx + c = 0

Block Example
$$ x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} $$
x=−b±b2−4ac2ax=\frac{-b \pm \sqrt{b^2-4ac}}{2a}

AsciiMath

An intuitive, readable syntax ideal for rapid documentation.

Inline (with Code Override Enabled)
`int_-oo^oo e^(-x^2)=sqrt(pi)`
∫−∞∞e−x2=π\int_{- \infty}^{\infty} e^{- x^{2}} = \sqrt{\pi}
Note: To use inline backticks for maths, enable "Render Markdown code inside backticks as AsciiMath" using the icon in the toolbar or in Settings.
Block (Code Block)
```am sum_(n=1)^oo1/n=prod_p 1/(1-p^-1) ```
∑n=1∞1n=∏p11−p−1\sum_{n = 1}^{\infty} \frac{1}{n} = \prod_{p} \frac{1}{1 - p^{- 1}}

Diagrams

Create flowcharts, sequence diagrams, and more using Mermaid.

Markdown to PDF Conversion

xyzEditor leverages your browser's native print engine to provide instant, secure Markdown to PDF conversion without sending your confidential data to a cloud server. Click (Ctrl + P) and select "Save as PDF".

Page Breaks

Use --- or *** to force new pages (you must optionally enable this in Settings).

Custom Margins

Define precise margins in millimeters under Settings > Printing.

Headers & Footers (Chromium Only)

Add page numbers and file names with customizable positioning.

Customization

Tailor xyzEditor to your workflow via the Settings menu .

Appearance

  • Themes: Choose Default (Lime), Black & White (High-contrast/Print), or GitHub (Dark).

Editor

  • Display: Toggle Line Numbers and Word Wrap.
  • Full Page Preview: Click the icon in the top right or press Ctrl + M to hide the editor and expand the preview.
  • Maths Mode: Enable "Render code as AsciiMath" to treat all backtick content as maths expressions.

Printing

Adjust margins (mm) and configure the placement of page numbers and file names for professional document exports.

Articles & Tools

Discover more about technical writing, SEO, and developer tools built specifically for xyzEditor users.

The Articles Hub

Deep-dive tutorials, mathematical formatting comparisons, and thoughts on the future of local-first software.

Developer Tools

A suite of free, lightning-fast utilities. 100% local-first. Your data never leaves your browser.