Slate Viewer guide
When to use Slate Viewer instead of VS Code or Obsidian Preview
If you already live in VS Code or Obsidian, you can open Markdown there. The question is whether that is the right tool when the job is only to read an AI report—one export, clear preview, verify the raw file, and leave. Slate Viewer is not Unreal Engine’s SlateViewer, not Technolutions Slate Reader, and not the jigish/slate window manager.
This page is a positioning guide, not a hit piece. VS Code and Obsidian are excellent at what they are built for. Slate Viewer is a local macOS reader for AI result files. It is not an IDE replacement, not a vault, and not Unreal Engine’s SlateViewer.
The job: reading AI result files
ChatGPT, Claude, and local pipelines leave files on disk: Markdown reports, JSON or JSONL dumps, TXT/LOG traces, CSV/TSV tables. Success for that job looks like:
- Open the file quickly
- Read a clear Preview
- Check Raw when something looks off
- Make a light fix if needed
- Close and move on
That is different from maintaining a codebase or growing a linked knowledge base. For what the Mac app is in one screen, see What is Slate Viewer for Mac?.
Where VS Code shines (concede honestly)
VS Code is a strong choice when you need:
- Multi-file projects and folders
- Git, terminals, and debugging
- Extensions and serious editing across a codebase
It is overkill when you only need to read one AI export and leave. Opening a report in an IDE works; it just pulls you into a workspace you did not ask for.
Where Obsidian Preview shines (concede honestly)
Obsidian is a strong choice when you need:
- Linked notes and long-term knowledge
- A vault you return to and grow over time
- Preview inside a note-taking system you already trust
It is heavier when you do not want another workspace—or a sync story—for a one-off report. If the file is not joining a vault, you should not have to invent one just to read it.
Where Slate Viewer fits
Slate Viewer is reader-first:
- Preview → Raw → light edit for AI output files
- Formats AI leaves: Markdown, JSON, JSONL/NDJSON, TXT/LOG, CSV, TSV
- macOS habits: Finder Open With, Markdown Quick Look
- EN ↔ Simplified Chinese Markdown translation for a full document or selection, without rewriting the source
- Local-first: does not upload document text, paths, JSON fields, table cells, or clipboard contents by default
- Mac App Store only, one-time purchase (see requirements below)
For export workflows specifically, see How to open ChatGPT and Claude Markdown exports on Mac. For structured dumps, see JSONL / NDJSON viewer for Mac. For mixed AI outputs, see Read AI output files on Mac.
Side-by-side decision table
| Need | Lean toward |
|---|---|
| Open one AI report and leave | Slate Viewer |
| Edit a codebase | VS Code |
| Grow a linked vault | Obsidian |
| PDF annotation | Neither — use a dedicated PDF app |
| Cloud sync workspace | Not Slate Viewer |
Requirements honesty
Slate Viewer 1.4.2 requires macOS 26.0 or later on Apple Silicon. If you are on an older macOS, keep using VS Code, Obsidian, or whatever you already have.
- Price: one-time US $14.90 on the Mac App Store during the launch-price period ending January 20, 2027
- Site: slateviewer.com · Mac App Store · Pricing
- The website does not sell a separate license
No fabricated speed benchmarks here—just workflow fit. Keep VS Code for coding; keep Obsidian for vaults; use Slate Viewer when the file is an AI result and the job is to read it locally.
FAQ
Is Slate Viewer a VS Code replacement?
No. It is a local reader for AI result files. Keep VS Code for coding and project work.
Is Slate Viewer an Obsidian alternative?
No. Obsidian is a knowledge base. Slate Viewer does not create a vault, sync files, or generate AI answers—it helps you read result files you already have.
Why use Slate Viewer if Preview already exists in other apps?
Slate Viewer is built around AI output formats (including JSONL/NDJSON, CSV, and TSV) with Preview, Raw, and light edit, plus optional EN↔ZH Markdown translation, without requiring an IDE or vault setup.
Does Slate Viewer upload files when I open them?
Not by default. It opens files locally and does not upload document text, paths, JSON key-value content, table cells, or clipboard contents to Slate Viewer servers.
What does it cost and what OS does it need?
Mac App Store only; US $14.90 one-time during the launch-price period ending January 20, 2027; version 1.4.2 requires macOS 26.0 or later on Apple Silicon.
Is Slate Viewer the same as Unreal / Technolutions / jigish slate?
No. Slate Viewer for Mac (App Store id 6789441727) is a local AI result-file reader. It is unrelated to Unreal Engine’s SlateViewer, Technolutions Slate Reader, and the jigish/slate window manager.
Related guides
Slate Viewer for Mac