OPFS Explorer by Hasan Bayat
A powerful DevTools extension to inspect, manage, and edit files in the Origin Private File System (OPFS)
2 Users2 Users
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About this extension
OPFS Explorer - The Missing DevTools Panel for Origin Private File System
The Origin Private File System (OPFS) is a powerful browser API for high-performance file storage, but browsers don't provide any way to see what's inside. OPFS Explorer fills this gap by adding a dedicated panel to Chrome DevTools.
WHAT'S NEW IN v0.0.4:
• Enhanced Security - No content scripts, no host permissions required
• Verified CRX Support - Signed extension builds for verification
• New Logo - Redesigned with folder, file, and magnifying glass elements
• Improved Architecture - Uses DevTools native API for better performance
SECURITY HIGHLIGHTS:
• NO host permissions - doesn't access any websites
• NO content scripts - no code injected into pages
• ONLY permission: clipboard for "Copy Path" feature
• Uses DevTools native inspectedWindow.eval() API
KEY FEATURES:
📂 Visual File Tree - Browse directories with file sizes and type icons
📝 Code Editor - Syntax highlighting for JSON, JS, TS, HTML, CSS
🖼️ Image Preview - Zoom, rotate, and inspect images up to 5MB
📑 Markdown Support - Preview or edit .md files
🖱️ Drag & Drop - Upload files or reorganize your file structure
⚡ Full CRUD - Create, rename, move, and delete files/folders
⬇️ Download Files - Export from OPFS to your local machine
📊 Storage Stats - Monitor your OPFS quota usage
⌨️ Keyboard Shortcuts - Ctrl+S save, Ctrl+F search, Ctrl+B sidebar
🌗 Theme Support - Adapts to DevTools light/dark themes
♿ Accessible - Full ARIA support and keyboard navigation
PERFECT FOR:
• SQLite Wasm applications (sql.js, wa-sqlite, sqlite-wasm)
• Progressive Web Apps (PWAs) with offline storage
• File System Access API projects
• Browser-based IDEs and editors
• Any app using navigator.storage.getDirectory()
PRIVACY:
• Runs entirely locally - no external connections
• No data collection or telemetry
• Minimal permission (clipboard only)
• No content scripts or host permissions
• Open source: github.com/hasanbayatme/opfs-explorer
HOW TO USE:
1. Open any website using OPFS (https or localhost)
2. Open DevTools (F12)
3. Click the "OPFS Explorer" tab
4. Browse, edit, and manage your files!
The Origin Private File System (OPFS) is a powerful browser API for high-performance file storage, but browsers don't provide any way to see what's inside. OPFS Explorer fills this gap by adding a dedicated panel to Chrome DevTools.
WHAT'S NEW IN v0.0.4:
• Enhanced Security - No content scripts, no host permissions required
• Verified CRX Support - Signed extension builds for verification
• New Logo - Redesigned with folder, file, and magnifying glass elements
• Improved Architecture - Uses DevTools native API for better performance
SECURITY HIGHLIGHTS:
• NO host permissions - doesn't access any websites
• NO content scripts - no code injected into pages
• ONLY permission: clipboard for "Copy Path" feature
• Uses DevTools native inspectedWindow.eval() API
KEY FEATURES:
📂 Visual File Tree - Browse directories with file sizes and type icons
📝 Code Editor - Syntax highlighting for JSON, JS, TS, HTML, CSS
🖼️ Image Preview - Zoom, rotate, and inspect images up to 5MB
📑 Markdown Support - Preview or edit .md files
🖱️ Drag & Drop - Upload files or reorganize your file structure
⚡ Full CRUD - Create, rename, move, and delete files/folders
⬇️ Download Files - Export from OPFS to your local machine
📊 Storage Stats - Monitor your OPFS quota usage
⌨️ Keyboard Shortcuts - Ctrl+S save, Ctrl+F search, Ctrl+B sidebar
🌗 Theme Support - Adapts to DevTools light/dark themes
♿ Accessible - Full ARIA support and keyboard navigation
PERFECT FOR:
• SQLite Wasm applications (sql.js, wa-sqlite, sqlite-wasm)
• Progressive Web Apps (PWAs) with offline storage
• File System Access API projects
• Browser-based IDEs and editors
• Any app using navigator.storage.getDirectory()
PRIVACY:
• Runs entirely locally - no external connections
• No data collection or telemetry
• Minimal permission (clipboard only)
• No content scripts or host permissions
• Open source: github.com/hasanbayatme/opfs-explorer
HOW TO USE:
1. Open any website using OPFS (https or localhost)
2. Open DevTools (F12)
3. Click the "OPFS Explorer" tab
4. Browse, edit, and manage your files!
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Permissions and data
Required permissions:
- Input data to the clipboard
- Extend developer tools to access your data in open tabs
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 0.0.4
- Size
- 296.74 KB
- Last updated
- 8 days ago (Nov 26, 2025)
- Related Categories
- License
- MIT License
- Version History
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