Binary, Octal, Decimal and Hex Converter (Plus Text to Binary)
Convert numbers between binary, octal, decimal and hexadecimal, and turn text into binary.
Open the free Binary, Hex, Decimal & Octal Converter →What is the Binary, Hex, Decimal & Octal Converter?
Convert numbers between binary, octal, decimal and hexadecimal, and text to binary. It's completely free, needs no sign-up and works on any phone or computer.
Why it's helpful
- Four number systems
- Text to binary
- Instant results
Who it's for
Students, programmers and electronics hobbyists.
How to use it
- Type in any box; the others update. Big numbers are supported.
💻 Open source: this tool is free and open source (MIT License). View the code on GitHub, download it and run it offline.
The bigger picture: Developer
Developers lose a surprising amount of time to small tasks: formatting data, decoding tokens, converting between formats and checking syntax. Fast in-browser tools keep you in flow and keep sensitive data off third-party servers.
What's changing: AI coding assistants now write a lot of code, but developers still need quick, trustworthy tools to inspect and verify what comes out: formatters, validators and decoders matter more, not less.
Frequently asked questions
What is hexadecimal?
Base 16, using 0–9 and A–F. It is used for colours (#FF8800) and memory addresses.
Use the Binary, Hex, Decimal & Octal Converter free →
No sign-up · Runs in your browser
