Fastboot Studio v2.0 Core is a modern, minimalist, open-source web IDE for interacting with Android devices in fastboot mode — powered entirely by the WebUSB API. No drivers, no SDK downloads, no command-line toolchains: connect a device, and flash, unlock, inspect and diagnose from any Chromium-based browser.
Built with 100% open-source standards (HTML5, CSS3, ES6) and delivered with full English (en) and Spanish (es-MX) internationalization.
- A modern browser with WebUSB support (Chrome 61+, Edge 79+, Opera)
- An Android device in fastboot mode (power off, then hold Volume Down + Power)
- A USB cable for device connection
- Serve this folder over HTTPS or run it on localhost / 127.0.0.1 (WebUSB requirement)
- Open
index.htmlin a supported browser - Click Connect Device to authorize and attach your device
- Use the three-pane IDE: device/system panels on the left, the fastboot console in the center, and command/partition/preset controls on the right
| Browser | WebUSB Support |
|---|---|
| Chrome / Edge | Full support |
| Opera | Full support (Chromium) |
| Firefox | Limited — manual about:config enablement required |
| Safari | Not supported |
⚠️ WebUSB requires a secure context: HTTPS or localhost. A standardfile://open or plain HTTP on a remote host will not work.
- Modern minimalist three-pane layout (device info · terminal · command center)
- Dark and light themes with instant toggle and persistence
- English + Español (MX) language switch with preference persistence
- Fully responsive — adapts from desktop to tablet and mobile
- One-click connect/disconnect with retry and progress feedback
- Live device info: manufacturer, product, serial, vendor/product IDs
- System telemetry: bootloader, baseband, security patch, lock status, battery, CPU, memory, display, network
- Saved device history and auto-reconnect detection
- Raw command terminal with
INFO / OKAY / FAIL / DATAprotocol handling - Full fastboot protocol state machine over WebUSB (64-byte command packets, 4-byte ASCII status, DATA handshake for images)
- Command history, recent commands, system logs and error alerts
- Statistics: commands sent, success/failure counts, connection time, data transferred, avg response time
- Variables, version, info, reboot
- Boot modes: bootloader · recovery · fastboot · download
- OEM actions: unlock / lock (with state-aware guards), OEM device info
- Flash file flow: select
.img/.iso/.bin/.zip, pick partition and type (Flash / Boot / Recovery), stream with progress bar
- List partitions, erase, format (ext4/f2fs/ext3/ext2/vfat/ntfs)
- Critical-partition guards (bootloader, gpt, mbr, partition, param) with double confirmation
- Per-partition inline Erase/Format actions
- 16 command presets: unlock, lock, wipe, safe mode, debug, performance, flashing, recovery, download, info, battery, screenshot, logcat, root, OEM unlock, FRP reset
- Tunable transport settings: timeout (ms), chunk size, retry attempts, keep-alive
- Bundled searchable manuals (pixel, vayu) rendered as Markdown in a modal
- Search by model, codename, manufacturer or description
- 100% client-side — zero telemetry, no server communication, nothing leaves your browser
- Every destructive operation (erase, format, flash, unlock) requires explicit confirmation
- Input validation on all commands and partition names
index.html — semantic HTML5, three-pane IDE shell, i18n-ready markup
styles.css — design system: CSS variables, Grid/Flexbox, dark+light themes
fastboot.js — FastbootDevice: WebUSB protocol engine (single-reader state machine)
i18n.js — I18n: English + es-MX dictionaries, persistence, observer pattern
app.js — FastbootApp: UI controller, events, validation, stats, presets
manual-search.js — ManualSearch: bundled device manual search + modal renderer
markdown-renderer.js — MarkdownRenderer: lightweight Markdown → HTML engine
manuals/ — bundled device manuals (.md)
Protocol layer (fastboot.js) implements the Android fastboot wire protocol on top of WebUSB:
- 64-byte zero-padded command packets (host → device)
- 4-byte ASCII status packets:
INFO/OKAY/FAIL/DATA(device → host) DATAhandshake for streaming flash/boot images with progress events- Disconnect detection, timeout management, and full event hooks (
onConnect,onDisconnect,onData,onError,onProgress,onLog)
- Device not detected — verify the device is in fastboot mode and the cable supports data (not charge-only)
- Permission denied — accept the USB permission prompt in the browser; re-check browser site permissions
- Browser not supported — use Chrome, Edge or Opera; WebUSB requires a secure context (HTTPS/localhost)
- File too large — the 5 GB safety limit was exceeded
- Invalid partition — partition names allow only
A-Z a-z 0-9 _ - - Connection lost — reconnect the device and retry the operation
- Slow responses — raise the timeout in the Advanced Configuration panel
- Memory — the app auto-trims history/logs/errors every 5 minutes
- UI lag — close unused tabs to free resources
- Phase 1 — Robustness: sparse-image streaming, chunked firmware flashing, deeper state verification
- Phase 2 — Ecosystem: recovery script generator, automated log diagnostics, community preset repository
- Phase 3 — Adoption: cross-vendor compatibility audits, multi-language translations, third-party developer SDK
MIT — free, auditable, and modifiable by the global community.
Contributions are welcome — submit a Pull Request.
Open an issue in the GitHub repository or contact the development team.
Built with ❤️ for the Android development community — open source, for everyone.