What is Slate Viewer for Mac?

Short answer

Slate Viewer is a local macOS reader for AI result files—Markdown, JSON, JSONL/NDJSON, TXT/LOG, CSV, and TSV. Open a file, switch between Preview and Raw, make a light edit if you need to, and leave. It does not upload document text, paths, JSON fields, table cells, or clipboard contents by default. It is sold only on the Mac App Store (product site: slateviewer.com).

What Slate Viewer is (and is not)

What it is

Slate Viewer is built for the files AI tools leave behind on your Mac:

• Formats: Markdown, JSON, JSONL/NDJSON, TXT/LOG, CSV, and TSV
• Modes: Preview for reading, Raw to check the source, and light edit when a small fix is enough
• macOS fit: Finder Open With, plus Markdown Quick Look
• Translation: English ↔ Simplified Chinese for a full Markdown document or a selection—switch views without rewriting the source file

For the latest format notes (including anything listed in App Store What’s New for Mermaid diagrams or YAML), check the live Mac App Store listing for Slate Viewer 1.4.2.

What it is not

• Not Unreal Engine SlateViewer. Unreal’s “SlateViewer” is an Unreal Engine UI/test program. Slate Viewer for Mac (slateviewer.com / App Store id 6789441727) is a separate consumer App Store reader for local AI output files.
• Not Technolutions Slate Reader and not the jigish/slate window manager—unrelated products that share the word “Slate.”
• Not an IDE. It does not replace VS Code, Xcode, or a project workspace.
• Not a PDF reader. Use a dedicated PDF app for annotation and long PDF workflows.
• Not a knowledge base or vault. It does not create linked notes, sync a library, or manage a second brain.
• Not an AI writer. It does not generate answers, chat with models, or replace ChatGPT/Claude.
• Not a cloud sync workspace. Files stay on your Mac; the product is a local reader, not a sync service.

Requirements and purchase

• Version: Live Mac App Store build is 1.4.2. If a marketing page still shows an older number, trust the App Store listing.
• System: Requires macOS 26.0 or later and an Apple Silicon Mac.
• Price: One-time US $14.90 Mac App Store purchase. The launch-price period runs through January 20, 2027. The website does not sell a separate license or license key.
• Purchase handling: Apple handles purchase, redownload, and refunds through the Mac App Store.

See pricing on slateviewer.com for the Mac App Store price and the macOS 26 requirement in one place.

Privacy in one sentence

Slate Viewer opens files on your Mac and does not upload document text, file paths, JSON key-value content, table cells, or clipboard contents to Slate Viewer servers by default.

FAQ

What is Slate Viewer for Mac?

Slate Viewer is a local macOS App Store app that reads AI result files—Markdown, JSON, JSONL/NDJSON, TXT/LOG, CSV, and TSV—with Preview, Raw, and light edit. It is not a knowledge base or AI writing tool.

Is Slate Viewer the same as Unreal Engine SlateViewer?

No. Unreal’s “SlateViewer” is an Unreal Engine UI/test program. Slate Viewer for Mac (slateviewer.com / App Store id 6789441727) is a separate consumer App Store reader for local AI output files. It is also not Technolutions Slate Reader or the jigish/slate window manager.

What macOS version does Slate Viewer need?

Slate Viewer 1.4.2 (Mac App Store) requires macOS 26.0 or later on Apple Silicon. If the website still shows an older build number, trust the live App Store listing.

How much does Slate Viewer cost?

It is a one-time Mac App Store purchase. The current US price is $14.90 through the launch-price period ending January 20, 2027. The website does not sell a separate license.

Does Slate Viewer upload my files?

Not by default. It opens files on your Mac and does not upload document text, file paths, JSON key-value content, table cells, or clipboard contents to Slate Viewer servers.

Can Slate Viewer translate Markdown?

Yes, between English and Simplified Chinese for a full Markdown document or selected text. You can switch between original and translated views without changing the source file.

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