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Base Converter
Invalid Octal Digit Detected (8 or 9)
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About

In legacy computing systems, file permissions (UNIX chmod), and low-level digital electronics, the octal numeral system (base-8) remains relevant. However, modern debugging often requires viewing these values in Binary (base-2) or Hexadecimal (base-16). This utility allows developers to seamlessly translate between these formats without manual calculation. It is specifically optimized for "BigInt" operations, meaning it can handle integer sequences far exceeding standard 32-bit or 64-bit limits, a common requirement when analyzing memory dumps or data streams. The tool includes strict input validation to instantly flag non-octal digits (8 and 9), ensuring code integrity.

programming octal hex binary base converter

Formulas

Octal conversion relies on the direct mapping of 1 octal digit to 3 binary bits.

Oct Bin : Expand digit to 3 bits
78 = 1112

Hexadecimal conversion is performed by regrouping the resulting binary bits into sets of 4.

Reference Data

Octal (Base-8)Binary (Base-2)Hex (Base-16)Decimal (Ref)
000000
100111
201022
301133
410044
510155
611066
711177
10001 00088
20010 0001016
77111 1113F63
100001 000 0004064

Frequently Asked Questions

The Octal system is base-8, meaning it uses only eight symbols: 0, 1, 2, 3, 4, 5, 6, and 7. The digits 8 and 9 do not exist in this system, similar to how there is no single digit for "ten" in decimal.
There is no theoretical limit in this tool. It uses JavaScript"s BigInt primitive, allowing you to convert arbitrarily large octal strings, limited only by your browser"s memory.
It is compact and maps perfectly to 3-bit groups. It is famously used in UNIX file permissions (e.g., "755") and in some legacy aviation and computing hardware.
Yes, the tool automatically strips whitespace from the input before processing, so you can copy-paste formatted strings directly.