JASON (JSON Manager)

Quick sidebar for saving and managing JSON snippets

JASON gives you a powerful JSON editor right in your browser sidebar - the coolest spot to paste your JSON snippets. Save up to 20 named snippets across tabs with syntax highlighting, line numbers, and live validation. Format to pretty print or minify to a single line in one click. Collapse and expand nested blocks instantly. Everything is saved locally, no network requests, no tracking, no data leaving your browser. 1.1.2 release notes - Fixed an issue where pasting JSON after clearing the editor could duplicate content. - Improved paste handling so a single paste event is processed once, preventing accidental repeated insertion. What's new in v1.1.0 Collapse All / Expand All nested blocks Drag and drop to reorder tabs Duplicate any tab in one click Undo / redo up to 50 steps Download snippets as JSON files Real time file size indicator Light and dark theme Keyboard shortcuts for all main actions Whether you're troubleshooting API payloads, inspecting partner requests, or just need a persistent place to manage your JSON. JASON keeps everything organised and always within reach.