Binary, Decimal, Hex and Octal
Number bases represent the same integer using different digit systems. Developers commonly use hexadecimal and binary when inspecting bytes, flags, memory values, and protocols.
Quick answer
Convert integers between binary, octal, decimal, and hexadecimal representations. The core operation is designed for quick browser-based use without an account.
How to use this tool
- Enter an integer in the supported base
- Choose the conversion
- And review the representations.
Common errors and things to check
Be careful with negative values, leading zeros, and values larger than the supported numeric range.
Common use cases
- Debugging bitmasks
- Reading hexadecimal IDs
- Learning number systems
Privacy and local processing
Core processing for this tool is designed to happen in your browser. The page does not intentionally upload ordinary tool input to a DataToolBase server. Do not paste passwords, private keys, access tokens, personal data, or other sensitive secrets unless you have verified the security requirements for your use case.
Frequently asked questions
What is hexadecimal?
Hexadecimal is base 16, using digits 0–9 and letters A–F.
Why use binary or hex?
They provide compact ways to represent bit-level and byte-oriented values.