JSON Viewer & Editor

Fish Network

About this app

JSON Viewer Editor — A Fast JSON Toolkit

A fast, privacy-first JSON viewer and editor built for developers and data-focused users. View, edit, validate, and format JSON — completely offline.

View & Edit JSON
• Code editor with syntax highlighting
• Collapsible tree view for easy navigation
• Create new files or edit existing ones
• Copy or share instantly

Import JSON Easily
• Paste from clipboard with instant validation
• Load JSON from any URL or API endpoint
• Built-in templates: API response, config, mock data
• Start from scratch with empty files

Powerful JSON Tools
• Validate — detect syntax errors instantly
• Format — beautify with clean indentation
• Minify — compress JSON for production
• Escape — escape or unescape strings

Format Conversion
• JSON ⇄ YAML
• JSON ⇄ XML
• Ideal for API testing and data transformation

File Management
• Save and organize multiple JSON files
• Quickly search and reopen recent files

Privacy First
• No account required
• No tracking or analytics
• Works fully offline
• Your data stays on your device

Whether you’re debugging API responses, editing config files, or learning JSON, JSON Viewer Editor keeps your workflow fast and simple.

What’s new

JSON Viewer Editor 1.0