ByteProbe: BLE Scanner & GATT

ByteProbe is a Bluetooth Low Energy (BLE) scanner and GATT explorer for developers. Built for embedded and IoT engineers, firmware developers and security researchers who need a fast, readable view of what a device is doing.

Scan
• Live list of nearby BLE advertisers with name, MAC address, RSSI and connectable flag
• Signal-strength chart to spot devices at a glance
• Classic Bluetooth scan tab for non-BLE devices

Explore GATT
• Connect to a BLE peripheral and browse all services and characteristics
• Property badges for Read, Write, Notify and Indicate
• Read, write hex payloads, and subscribe to notifications and indications
• Values update live as reads and notifications arrive, and you can copy any value as hex

Decoders for standard characteristics
Battery Level, Heart Rate (including RR intervals and energy expended), Body Sensor Location, Device Information strings, System ID, PnP ID, Appearance, Health Thermometer, Blood Pressure, Tx Power, Alert Level, connection parameters, Service Changed, Cycling and Running Speed and Cadence, and Environmental Sensing (temperature, humidity, pressure). Other values are shown as hex with an ASCII view, handy for text protocols such as Nordic UART.

Live traffic log
Every GATT event - connect, MTU change, service discovery, each read, write and notification - with timestamps, direction, hex payload and status. Pause and clear any time.

Profiles and sessions
• Bookmark a device and save a snapshot of its GATT tree
• Every connection is recorded as a session, with decoded values saved next to the raw hex
• Export a session as CSV or JSON from the session list or the session detail screen, or export all app data as JSON. Export is included free.

Designed for the bench
• Material 3 design in light and dark, with monospace hex and clear status colors
• Adjustable default MTU and optional auto-scan on launch
• No account, no analytics. Your data stays on your device.

Free and ad-supported. Optional one-time purchase to remove ads.

Recent changes:
Optimized for tablets, foldables and Chromebooks: side navigation, two-pane layouts and hardware keyboard support.