Native · Rust + egui

levium

A native Markdown editor written in Rust + egui. No Electron, no Tauri, no WebView.

Download for Windows
Version
1.0.0
Platform
Windows 10 / 11 · 64-bit
Download
6 MB
The levium editor window in dark theme, with the file panel, outline, Markdown source and live preview side by side

6 MB

Install size

45 MB

Memory when idle

0.18 s

Cold start

0

Browser engines

No ElectronNo TauriNo WebViewRust + egui6 MB install0.18 s cold startPlain .md filesOne-time licence

01Performance

Performance, measured

What happens when the editor is not carrying a browser engine.

Install size

01

6MB

27× smaller than Electron

Memory (idle)

02

45MB

7× less memory than Electron

Cold start

03

0.18s

13× faster to launch

Same task, three stacks

levium · Tauri · Electron

Lower is better

leviumTauri · Electron
 leviumnativeTauriElectron
Install size6MB
12MB
165MB
Memory (idle)45MB
120MB
320MB
Cold start0.18s
1.1s
2.4s

Note:Figures are typical reference values for each stack, shown to illustrate order-of-magnitude differences rather than a controlled benchmark run.

02Built native

Built like a native app — because it is one

No hidden renderer, no runtime to boot, no web layer pretending to be a desktop window.

Native, not a browser

There is no Chromium, no WebKit and no WebView2 anywhere in the process. levium draws its own window with egui and talks straight to the operating system — which is why it weighs megabytes instead of hundreds of them.

Instant startup

A lean Rust release build with LTO. Nothing has to boot before your first keystroke.

Light on memory

No renderer process, no JavaScript heap, no idle tax while you are just reading.

Live, in-place rendering

Type Markdown and watch it format itself. No split preview pane, no modal window.

Your files stay yours

Plain .md files on your disk. No account, no sync server, no lock-in.

03Make it yours

Every setting in one panel

Theme, body size, CJK fallback font, interface language and panel visibility — no config files, no restart, applied the moment you click.

  • Light, dark, or follow the system

    Three theme modes with light and dark previews, so you can see the switch before you make it.

  • Body size scales editor and preview together

    One slider keeps the source and the rendered document aligned as you resize.

  • Pick the CJK fallback font

    Latin text uses the bundled HarmonyOS Sans; CJK characters fall back to whichever font you choose.

  • Interface language: English or 中文

    Every label switches immediately — the document you are writing is never touched.

  • Collapse the panels you do not need

    File tree, outline and preview toggle independently, so the editor can take the whole window.

The levium settings panel, grouped into Appearance, Language, Panels and License

04Answers

Questions

Short answers, no sales pitch.

01Does levium need an internet connection?
No. It opens files on your disk and writes them back. There is no account to create and no sync server involved.
02How do I install it?
You download a single .exe for Windows 10 or 11 (64-bit), and run it. There is nothing else to install first.
03Can I try it before paying?
Yes. Every download starts a 30-day trial with the full feature set, and the settings panel shows the days remaining. Entering a licence key at any point turns it into a permanent licence.
04Will my notes be locked into a proprietary format?
No. levium reads and writes plain Markdown. Your files stay in whatever folder you already keep them in, and any other editor can open them.
05What does the licence cover?
One purchase buys a lifetime licence for the 1.x line, including updates. It is $6.9 during the launch window and $9.9 afterwards — no subscription, ever.

05Pricing

One-time purchase. Pay once, keep it forever.

Launch offer
$6.9$9.9

one-time · Regular price after launch:$9.9

Checkout is not open yet. Start the free 30-day trial now — the buy button goes live soon.

What you get

  • Lifetime licence — pay once, keep it
  • Free updates for the 1.x line
  • Native app — no Electron, Tauri or WebView
Free 30-day trial

Try it before you decide.

Download the trial, write something, and see how quickly it gets out of your way.

Download for Windows

Free 30-day trial · Windows 10 / 11 · 64-bit · 6 MB