Welcome to
online split-screen Markdown/ HTML Editor with a Live Preview!
📝 Write (using the editor on the left side 👈)
- common Markdown syntax extended with Github Flavored Markdown (GFM) (see the guide)
- vanilla HTML tags with inline CSS styles & embed HTML elements, like video, audio, websites etc. (see the guide)
- highlighted code blocks
🔎 & see how it is rendered as an HTML! (in the renderer on the right side 👉)
Actually... 😏 you can edit this rendered default text right now by editing Markdown in the editor on the left! 👈😎
Or... you can start from scratch in the editor, write some Markdown & it will be 💾 saved automatically in local storage for future use!
💪Battle-tested Markdown Editor & Renderer
This Markdown Editor & Rendered (these are 2 separate components) is used in a few of my real-world open source projects:
- linky_notes 👉 app | repo
- Issue Tracker 👉 app | repo
- my personal website 👉 website | repo
- Blogging Platform (old & new versions) 👉 platform | repo
🚀Updates after 3 years😏
The project was established in 2021, but it was upgraded, extended & rewritten basically from scratch in January 2024.
I've added new editor/renderer features, upgraded tech stack (upgraded React and finally migrated to Next.js) & added new guides. Let's dive in!
New Markdown Editor/ Renderer features
| Editor/ Renderer Features | 2022 | 2024 |
|---|---|---|
| Markdown | ✅ | ✅ |
| GitHub Flavored Markdown (GFM) | ✅ | ✅ |
| code highlighting (auto light & dark mode) | ❌ | ✅ |
| HTML tags | ❌ | ✅ |
| inline CSS styles | ❌ | ✅ |
| embed elements | ❌ | ✅ |
| react-markdown/ custom renderer switching | ❌ | ✅ |
New App features
| App Features | 2022 | 2024 |
|---|---|---|
| Routing | ❌ | ✅ |
| Dark/ Light Mode | ❌ | ✅ |
| Guides | ❌ | ✅ |
| Show/ hide editor/ renderer | ❌ | ✅ |
New additional custom renderer (along with previous react-markdown based renderer)
Also I've created & added a new custom react-markdown-free Markdown Renderer along with the existing renderer built on top of react-markdown renderer, so now you can switch between them using a checkbox in the navbar. Custom renderer is the default option (becuase it's bugs-free 😏).
Those 2 coexisting renderers give almost same input, but there are a few differences (pros & cons):
| react-markdown based editor | custom renderer | |
|---|---|---|
| react-markdown | ✅ | ❌ |
| remark plugins | ✅ | ❌ |
| rehype plugins | ✅ | ❌ |
| footnotes | ✅ | ❌ |
| partial HTML/ CSS inline styles bug-free | ❌ | ✅ |
| marked | ❌ | ✅ |
| dompurify | ❌ | ✅ |
| highlight.js | ❌ | ✅ |
Technologies used in the project
| Technologies | 2022 | 2024 (1st upgrade) | 2024 (2nd upgrade) |
|---|---|---|---|
| next | ❌ | ❌ | 14.0.4 |
| react | 17.0.2 | 18.2.0 | 18.2.0 |
| javascript | ✅ | ✅ | ✅ |
| typescript | ❌ | ❌ | ✅ |
| react-markdown | 7.0.1 | 9.0.1 | 9.0.1 |
| react-router-dom | ❌ | 6.21.1 | ❌ |
| bootstrap | 5.1.3 | 5.3.2 | 5.3.2 |
| bootstrap-icons | ❌ | 1.11.3 | 1.11.3 |
| remark-gfm | 3.0.0 | 4.0.0 | 4.0.0 |
| rehype-raw | ❌ | 7.0.0 | 7.0.0 |
| rehype-highlight | ❌ | 7.0.0 | 7.0.0 |
| dompurify | ❌ | 3.0.8 | 3.0.8 |
| isomorphic-dompurify | ❌ | ❌ | 2.2.0 |
| marked | ❌ | 11.1.1 | 11.1.1 |
| highlight.js | ❌ | 11.9.0 | 11.9.0 |
| gh-pages | 3.2.3 | 6.1.1 | ❌ |
| GitHub Pages/ GitHub Actions/ CI/CD | ❌ | ❌ | ✅ |
| 💾 localStorage (to store inputed markdown) | ✅ | ✅ | ✅ |
🐞 WARNING!
Partial HTML/ inline CSS bug
in react-markdown based renderer
(❗use custom renderer instead (default)❗)
If you're using react-markdown renderer option, you can get some errors caused by partial HTML or incomplete inline CSS styles in your markdown while you're editing content & the app may crash...
I will fix it eventually, but don't worry - your content is always synced with local storage, so refresh the page & fix your partial HTML in non react-markdown renderer option (by default the editor is using my custom md renderer, which is not causing such errors) & you can continue working with react-markdown based renderer if you want to.