Embedded Toolbox

Online tools for MCU, protocol and debugging work: register bitfields, byte streams, checksum algorithms, cloud platform credentials. Pure client-side — your data never leaves the browser.

8 available1 external toolAll computation happens in your browser. Nothing you type is uploaded.

Math / Numeric

Ready

Number Base Converter

Binary / octal / decimal / hex conversion with big integers, two's complement by bit width and byte order views.

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Ready

CRC Calculator

24 presets (CRC-8/16/32/32C/64, Modbus, CCITT…) plus custom parameters and whole-frame CRC checks.

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Ready

Bitfield / Register Viewer

Inspect a register bit by bit, toggle / set / clear, and emit HEX plus C macros.

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Ready

Unit Converter

Frequency & period, storage, data rate, voltage/current and ADC codes — everyday embedded unit conversions in one place.

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Byte streams / Encoding

Ready

HEX ↔ ASCII / C array

Convert between hex and text, and generate a round-trippable uint8_t array.

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Protocols / Comms

Ready

Modbus Frame Builder

Build RTU and TCP read/write frames with automatic CRC16 and MBAP header.

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Ready

Web Serial Monitor

Talk to a serial port from the browser: HEX / text / ANSI logs, packet merging, quick commands, auto-reconnect.

Needs local browser hardware accessOpen tool

Cloud / Config

Ready

OneNET MQTT Credentials

Generate the MQTT credential triplet, thing-model topics and runnable ESP-AT commands.

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External tools

ExternalReady

Chip Pin Lookup

Enter a part number and jump to PinAtlas for the pinout, alternate functions and AF numbers.

Go to PinAtlas