| Key features | - Real-time collaborative merging of concurrent edits using Y.js CRDT
- Autosave one second after typing stops, or every five seconds if typing continues
- Preserves file encoding, line endings, YAML/TOML front matter, and reference-style links
- GitHub Flavored Markdown support including tables, task lists, and footnotes
- Mermaid diagram rendering with live preview
- Safe handling of untrusted external documents
- Remote image blocking until explicitly allowed by user
- Toggle between WYSIWYG and raw markdown view with Cmd-/
- Supports both Apple silicon and Intel Macs with macOS 14 or later
| - One-click copy for 30+ invisible and whitespace Unicode characters
- Custom length generator for multiple characters at once
- Platform-specific guides for WhatsApp, Discord, Instagram, Facebook, X, and TikTok
- Live detector tool to find hidden invisible characters in pasted text
- 16 Unicode text style generators for bold, italic, cursive, gothic, and more
- No account required; works entirely in the browser
- Platform compatibility notes for each character
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| What makes it different | - Only editor that merges AI agent edits in real time without breaking user workflow, using CRDT technology
- Native macOS app with WebKit bundled so no network calls needed
- WYSIWYG editor that saves as plain markdown files
- Preserves exact file bytes when opening and saving without editing
- Built with heavy AI assistance for reliability and correctness
| - Tested presets for specific platforms instead of guessing which characters survive filters
- Live detector to catch hidden invisible characters before publishing
- Free and independently maintained with no account required
- Honest platform guidance instead of promises that all characters work everywhere
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