A lightning-fast Windows file explorer with real-time folder sizes, Quick Look preview, and a sleek dark UI — built with Go and Wails.
- Instant directory listing — reads directory entries immediately with no blocking
- Concurrent folder sizes — all folder sizes calculated in parallel using Windows native
FindFirstFileAPI, streamed live as they arrive - Sort by size — list re-sorts in real time as folder sizes load in; sort preference persists across sessions and folder navigation
- Quick Look (
Space) — preview images (JPG, PNG, GIF, SVG, WebP…), source code and text files, or folder stats — without opening a separate app - Arrow navigation in preview (
←/→) — flip through files while Quick Look stays open - Real-time search — filters the current directory as you type
- Drive panel — shows all drives with usage bars and free space
- Recycle Bin delete (
Delete) — sends files to Recycle Bin, never permanently deletes - Rename (
F2), New Folder, Copy, Open in Explorer - Virtual scroll — renders only visible rows; handles 100 000+ files without lag
- Keyboard-first navigation — arrow keys, Enter, Backspace, Alt+←/→
Grab the latest FastFileExplorer.exe from the Releases page.
No installation required — just run the .exe. Windows 10/11 has WebView2 built in.
| Key | Action |
|---|---|
Space |
Open / close Quick Look |
← → |
Navigate files in Quick Look |
Esc |
Close Quick Look |
Enter |
Open file or folder |
F2 |
Rename |
Delete |
Move to Recycle Bin |
Backspace |
Go up one level |
Alt + ← |
Back |
Alt + → |
Forward |
| Arrow keys | Move focus up / down |
| Layer | Technology |
|---|---|
| Backend | Go — file I/O, concurrent folder sizing, Windows API calls |
| Frontend | Vanilla JS + Vite — zero framework overhead |
| Bridge | Wails v2 — wraps WebView2 (built into Windows 10/11) |
- Windows 10 or Windows 11
- No additional runtime — WebView2 is built into the OS