| 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
| - Multiple case styles including UPPERCASE, lowercase, sentence case, title case and capitalized case
- Playful text styles: alternating case, inverse case, toggle case
- Keeps acronyms and brand names capitalized
- Preserves line breaks, spacing, numbers, punctuation and emoji
- Live character, word and line counts
- Copy result or download as text file
- Chain conversions with use result as input
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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
| - Private by design: all text conversion happens in your browser with no uploads or server storage
- Accurate title case following common style-guide rules for small words and hyphenated words
- Works everywhere on phones, tablets and desktops with keyboard and screen reader support
- Every example on the site is generated by the same code you use
- No ads or heavy scripts for fast, lightweight pages
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editmd
CaseKit