Open Markdown, JSON, and CSV files in one place

One viewer for the files AI tools make

Claude Code, Codex, Cursor, and your technical collaborators hand you files. Artifact Desk turns them into documents, tables, trees, previews, and safe edits without making you learn an IDE. It runs locally on macOS and Windows.

The problem is rarely generating the file. The problem is the last mile: opening it in a form you can understand, checking whether it is correct, and making a small change without breaking its structure. A text editor shows punctuation. A browser shows only the result. An IDE shows an entire development environment.

Open Markdown as a calm document

Read the plan, not the punctuation. In the rich view, headings, lists, links, and decisions become a calm document. The source stays one click away.

Documents beyond Markdown open here too. Artifact Desk views plain text, rich text, and PDFs, so a brief, a note, and a final PDF sit in the same workspace.

Open JSON as a labeled tree

Understand nested data without learning JSON. Objects unfold into a labeled tree. Expand only what matters, or switch to the exact source.

Structured data support goes past JSON. The viewer also handles JSONC, CSV, TSV, YAML, TOML, XML, and environment files. Visual views are projections of the real file, not detached cloud copies. See the full format list on the AI artifact viewer page.

Open CSV as a table you can scan

Turn exports into something you can scan. Rows and columns become a clean table with sorting, clear headers, and the raw file still available.

Sort a column to find the row you need. Switch to the source whenever you want the exact values.

Previews, components, and unknown files

HTML opens as a safe visual preview. You see the page, not a wall of tags. Scripts and remote requests are blocked.

React components open in a design view. Select supported elements and adjust text, color, spacing, or alignment with bounded controls. The source remains authoritative.

Images, SVG, logs, and metadata get familiar viewers. Unknown text opens as text. Unknown binary is limited to metadata and bounded hexadecimal inspection, so every file has somewhere to go.

Local, private, and free to start

Artifact contents are never uploaded. File reading, previews, and supported edits happen locally. This is not an IDE. Artifact Desk does not install dependencies, run a development server, or replace a developer's coding environment.

The local viewer is free forever, with no account, no watermark, and no project limit. Pro covers the work that needs edits, saving, conversion, or printing, and every Pro feature is open for 14 days.

For what to do with these files after you open them, see read and keep the files your AI writes. To build a habit of finding them again later, see Keep the files your AI writes findable.

Frequently asked questions

Can one app open Markdown, JSON, and CSV together?

Yes. Markdown opens as a rich document, JSON as a labeled tree, and CSV as a sortable table. Each view keeps the source one click away.

Is Artifact Desk an IDE?

No. It does not install dependencies, run a development server, or replace a coding environment. It opens the useful view of a file.

Are my files uploaded?

No. Artifact contents are never uploaded. File reading, previews, and supported edits happen locally.

What happens with a file format I do not recognize?

Unknown text opens as text. Unknown binary is limited to metadata and bounded hexadecimal inspection.