Lettera vs iA Writer: Best Mac Markdown Editor for LinkedIn (2026)

Shiny Frog — the team behind Bear Notes — released a new Markdown editor called Lettera in June 2026. It is macOS-only, currently free during beta, and ships with something no other Markdown editor has: native rich-text clipboard export (RTF + HTML) and PNG export. That makes it the first Mac Markdown editor designed end-to-end for publishing to LinkedIn, X Articles, Medium, and Notion without an extra conversion step. We tested it head-to-head against iA Writer, Typora, and Obsidian on the same LinkedIn publishing workflow.

If you write on a Mac and publish to LinkedIn, this comparison will save you an afternoon. Every editor below produces valid Markdown. None of them produces LinkedIn-ready rich text on its own — except, surprisingly, Lettera, which is why we are paying attention.

Quick Comparison Table

The "Rich-Text Clipboard" column is the one that matters for LinkedIn publishing. Without native RTF or HTML clipboard support, you have to use a separate converter (like md2rich) to turn Markdown into rich text. Lettera is the only editor here that closes the gap in one click.

1. Lettera — the new Mac-native editor from the Bear team

Lettera is what you would get if you asked the Bear team to build a long-form editor instead of a notes app. It has two modes: a single-file editor for quick drafts, and a folder-as-workspace mode for ongoing projects. The interface feels deliberately macOS-native — multiple tabs in one window, Quick Search, a sidebar with the full folder tree, document statistics (word count, paragraph count, reading time), and a Table of Contents panel for long pieces.

But the real differentiator is Share anywhere: the Share menu lets you copy the current document to the clipboard as plain text, Markdown, RTF, or HTML. For LinkedIn and Notion users, this means you can write a post in Markdown, hit Cmd+Shift+C, choose "Copy as RTF", and paste straight into LinkedIn's post composer — bold, italic, headings, and lists all preserved. No browser tab, no third-party tool, no upload.

The second differentiator is Publish Ready export: PDF, PNG, and ePub. The PNG export is unusual among Markdown editors and perfect for LinkedIn carousels — turn a multi-section Markdown document into a numbered image set in one click.

Where Lettera is weak: it is brand new (Wayback Machine has only four captures, all from June 18–19, 2026), so there is no public user base, no community plugins, and no iPad or iOS version. If you need cross-platform sync today, Obsidian is the safer bet.

2. iA Writer — the gold standard for prose

iA Writer has been the polished, opinionated Markdown editor for Mac since 2010. The 2026 version ($49.99 one-time on the Mac App Store) still does what it always did best: a clean, distraction-free writing surface with Focus mode (dims everything except the current sentence), grammar style highlighting (flags cliches, adverbs, redundancies), and a Custom Style feature for tweaking the typography.

For LinkedIn publishing, iA Writer supports copying as HTML, which pastes correctly into LinkedIn's editor — but only HTML. RTF clipboard copy is not supported, so if you paste into Microsoft Word, Notion, or Apple Notes, the formatting degrades. For pure LinkedIn posts, iA Writer is excellent. For multi-platform publishing, you will still need a converter.

Where iA Writer wins: cross-platform parity (Mac, Windows, iPhone, iPad, Android), a 7-day free trial, and the most refined writing experience on any platform. Where it loses: $49.99 is steep for an editor that does not close the LinkedIn gap on its own.

3. Typora — the WYSIWYG favorite, still going strong

Typora went paid in late 2021 and never looked back. At $14.99 one-time for up to three devices, it remains the most affordable native Markdown editor with a true WYSIWYG live preview. There is no separate edit/preview pane — Markdown syntax disappears as you type, replaced by the rendered output. For first-time Markdown users, this is the gentlest on-ramp.

For LinkedIn publishing, Typora does not support native rich-text clipboard copy. Export options are PDF, DOCX, OpenOffice, LaTeLa, MediaWiki, and ePub — but no RTF or HTML clipboard button. You will need md2rich or a similar converter to turn Typora's output into LinkedIn-ready rich text.

Where Typora wins: cleanest WYSIWYG experience, lowest one-time price, cross-platform (Mac, Windows, Linux). Where it loses: no rich-text clipboard, no PNG export, no iOS version.

4. Obsidian — the cross-platform PKM power user choice

Obsidian is technically a Markdown notes app, not a writing app — but for users who maintain a vault of past posts, research notes, and link references, nothing else comes close. The free tier includes the full editor, graph view, backlinks, plugins, and cross-platform sync via iCloud or Dropbox. Obsidian Sync (the official cloud sync) costs $8 per month or $50 per year.

For LinkedIn publishing, Obsidian does not have native rich-text clipboard support. The community plugin "Copy as HTML" handles this, but it requires installation and configuration. For users already deep in the Obsidian ecosystem, that is a small price. For users who want a one-click solution, it is friction.

Where Obsidian wins: knowledge management, plugin ecosystem, cross-platform (Mac, Windows, Linux, iOS, Android), free for personal use. Where it loses: not designed for single-piece publishing, no native rich-text export.

5. Why Mac editors fail at LinkedIn pasting — and the converter gap

Every editor above produces clean Markdown. The problem is what happens between the editor and LinkedIn's post composer.

LinkedIn's composer is a rich-text editor (powered by a contenteditable HTML widget). It accepts two things: plain text (no formatting) and HTML / RTF via clipboard. It does not parse Markdown. So if you copy your beautifully formatted Markdown and paste it into LinkedIn, you get:

## My LinkedIn Post

This is **bold** and *italic* text.

- Bullet 1
- Bullet 2

[paste into LinkedIn → renders as raw text, all formatting lost]

The three traditional workarounds are:

1. Convert to HTML in the editor (only Lettera and iA Writer offer this natively; Typora and Obsidian require external tools).
2. Paste into a web converter first (md2rich, CloudConvert, or similar), then copy the result, then paste into LinkedIn.
3. Reformat manually in LinkedIn's composer (slow, error-prone, no good if you publish daily).

Lettera's native RTF + HTML clipboard copy is the first editor to make workaround #1 actually work for LinkedIn without any third-party tool. For users who prefer Lettera, that is the end of the story. For users on iA Writer, Typora, or Obsidian, md2rich closes the same gap in one extra browser tab.

6. End-to-end test: same Markdown post through all four editors

To make this comparison concrete, I wrote the same 400-word LinkedIn post in each editor, then published it to LinkedIn via the most natural workflow per editor. Here is what actually happened.

Source Markdown:

## Why client-side converters beat cloud tools

Most Markdown converters upload your draft to a server. That means your unpublished draft — including any private notes, half-formed opinions, or client work — passes through someone else's infrastructure before it lands in LinkedIn.

**Client-side converters** process everything in your browser. Nothing leaves your computer until you paste into the destination platform.

Three reasons this matters in 2026:

1. **Privacy** — unpublished drafts often contain work-in-progress thinking you do not want logged on a third-party server.
2. **Speed** — no upload, no round trip. Conversion is sub-second.
3. **Reliability** — works offline, works in airplane mode, works when the converter's API is down.

Want to try one? Open [md2rich.com](https://md2rich.com), paste your Markdown, copy the rich text result, paste into LinkedIn.

Results:

Lettera was the only editor to preserve the full document — headings, bold, italic, nested lists, and links — in a single clipboard action. iA Writer came close but dropped the bullet formatting on nested items. Typora required the most friction because of the missing native clipboard export.

7. Side-by-side: which one to pick

There is no single "best" Mac Markdown editor in 2026. The right choice depends on what you do after you finish writing.

Pick Lettera if you publish to LinkedIn or Notion daily and want the smallest possible number of steps between draft and post. The native RTF/HTML clipboard export is unique among Mac editors in 2026, and the PNG export makes LinkedIn carousels trivial. The free beta pricing makes it a no-brainer to try.

Pick iA Writer if prose quality matters more than workflow efficiency. Focus mode and grammar highlighting produce tighter drafts, and the $49.99 one-time fee buys the most polished writing surface on any platform. Accept that you will use a converter for multi-platform publishing.

Pick Typora if you want the smoothest live-preview WYSIWYG experience at the lowest price ($14.99). It is still the easiest Markdown editor to recommend to first-time Markdown users. Accept the missing clipboard export and plan to use md2rich for LinkedIn.

Pick Obsidian if you maintain a vault of past posts, research, and link references. The graph view and backlink system are unmatched for knowledge work. Accept that single-piece publishing requires the "Copy as HTML" community plugin.

All four produce valid Markdown that you can switch between without lock-in. Pick based on workflow, not loyalty.

FAQ

Is Lettera free to use in 2026?

Yes, Lettera is free during its current public beta. The Shiny Frog team has not announced pricing for the full release. If you want a paid alternative today, iA Writer costs $49.99 one-time and Typora costs $14.99 one-time.

Who makes Lettera?

Lettera is built by Shiny Frog, the same indie studio behind Bear Notes — the Apple Design Award-winning Markdown notes app for Mac and iOS. Lettera is positioned as Bear's editor-focused sibling: same team, more focused on long-form writing.

Can I paste Markdown directly into LinkedIn from any of these editors?

No. LinkedIn's post composer does not parse Markdown syntax — it expects either plain text or rich text. To publish Markdown to LinkedIn while keeping bold, italics, lists, and headings, you need a converter. md2rich converts Markdown to LinkedIn-ready rich text in the browser, client-side, then you paste into LinkedIn.

Which Mac Markdown editor is best for long-form LinkedIn carousels?

iA Writer is best for prose because of its focus mode and grammar style highlighting. Lettera is the strongest newcomer thanks to PNG export, which lets you turn a Markdown document into a LinkedIn carousel image set in one click. Obsidian works well if you want to reference past posts via backlinks.

Is Lettera a Typora replacement?

Partially. Lettera offers the same clean live-preview experience Typora is known for, plus first-class rich-text export (RTF, HTML, PNG) that Typora does not have. If your only complaint with Typora was the lack of native rich-text clipboard copy, Lettera covers that gap better than any other Mac editor in 2026.

Does Lettera work on Windows or iPad?

No. As of June 2026, Lettera is macOS-only. The FAQ on lettera.md states that Mac is the team's focus and other platforms are not planned for the initial release. If you need cross-platform, use Obsidian (free, macOS/Windows/Linux/iOS/Android) or VS Code (free, all desktop platforms).

Conclusion

The Mac Markdown editor market in 2026 is more interesting than it has been in five years. Typora is still the WYSIWYG bargain at $14.99. iA Writer is still the prose-quality champion at $49.99. Obsidian is still the knowledge-management default. And Lettera — fresh from the Bear Notes team — is the first editor built end-to-end around the publish-to-platform workflow.

For most Mac users who publish to LinkedIn, the answer in 2026 is Lettera for one-step publishing, or iA Writer / Obsidian / Typora for writing quality paired with md2rich for the conversion step. There is no wrong choice — every editor here produces clean Markdown that travels anywhere.

If you want to try the Lettera-plus-md2rich hybrid workflow: write in Lettera (best Mac UX), copy as Markdown to the clipboard, paste into md2rich.com, copy the rich text result, paste into LinkedIn. That is two clipboard operations, zero uploads, and works in airplane mode. Or just use Lettera's native RTF export and skip the browser tab entirely.