Preview JSONL

A lightweight VS Code extension for previewing JSONL (JSON Lines) files with syntax highlighting.

Note: This extension was developed based on version 0.4.1 of the following extension[https://github.com/toiroakr/jsonl-editor]. The key difference is that while jsonl-editor loads libraries from CDN, this extension was created to work in environments without internet connectivity.

Features

• Line-by-line Preview: View formatted JSON for each line in a JSONL file
• Navigation: Easy navigation between lines with Prev/Next buttons
• Line Jumping: Go to specific line number
• Copy to Clipboard: Copy the current JSON to clipboard with one click
• Syntax Highlighting: Color-coded JSON with keys, strings, numbers, and literals
• Offline Support: Works without internet connection (no external dependencies)
• Real-time Updates: Preview updates automatically as you navigate through the file

Usage

Quick Start

1. Open a .jsonl file in VS Code
2. Right-click in the editor
3. Select "Preview JSONL" from the context menu
4. A preview panel will open on the right side showing the formatted JSON for the current line

Navigation

• Prev/Next buttons: Navigate to previous or next line
• Line input: Type a line number and press Enter to jump to that line
• Copy JSON button: Copy the current JSON to clipboard
• Cursor movement: The preview automatically updates when you move your cursor in the editor

Installation

From VSIX File

1. Build the VSIX package:

   npm install
   npm run compile
   npm install -g @vscode/vsce
   vsce package
   

2. Install in VS Code:

   • Open VS Code
   • Go to Extensions (Ctrl+Shift+X)
   • Click the "..." menu → "Install from VSIX..."
   • Select the generated preview-jsonl-0.0.1.vsix file

From Source (Development)

1. Clone the repository
2. Install dependencies:

   npm install
   

3. Press F5 to open a new VS Code window with the extension loaded

Requirements

• VS Code version 1.102.0 or higher

Extension Settings

This extension does not require any configuration.

Known Issues

None at this time.

Release Notes

0.0.1

Initial release:

• JSONL file preview with syntax highlighting
• Line navigation (Prev/Next, jump to line)
• Copy JSON to clipboard
• Offline support (no external dependencies)

License

This project is licensed under the MIT License - see the LICENSE file for details.