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Hazuu Tools

Hex to Octal

Convert hexadecimal numbers to octal — enter, convert, and copy instantly.

Input Hex
Output Octal
Octal output will appear here...
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About Hex to Octal Converter

Hexadecimal to octal conversion translates base-16 numbers (using digits 0-9 and letters a-f) into the base-8 numbering system. Both hex and octal are commonly used as compact representations of binary data — hex groups four binary bits per digit while octal groups three. Converting between them is useful in computing contexts like Unix file permissions, legacy systems, and low-level programming where octal notation is preferred.

This free online converter handles everything from single hex digits to arbitrarily large hexadecimal numbers using BigInt for full precision. You can convert multiple hex values at once by entering each on a separate line, and any 0x prefix is automatically stripped. All processing runs entirely in your browser — no data is ever sent to a server, so your input stays completely private. No sign-up, no ads, just instant hex-to-octal conversion.

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How to Use

01

Enter Hex Number

Type or paste your hexadecimal number into the input area. You can enter multiple numbers on separate lines for batch conversion. A 0x prefix is automatically removed.

02

Convert

Click "Convert" to calculate the octal equivalent of your hex input. Each line is converted independently.

03

Copy Result

Copy the octal result to your clipboard with one click using the copy button in the toolbar.

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Frequently Asked Questions

What is hex to octal conversion? expand_more
Hex to octal conversion translates a base-16 number (using digits 0-9 and letters a-f) into a base-8 number (using digits 0-7). For example, hex ff equals octal 377, and hex 3e8 equals octal 1750. Both systems are shorthand for binary — hex groups four bits per digit while octal groups three.
How does hex to octal conversion work? expand_more
The hex number is first converted to its numeric value, then re-expressed in base 8. Internally, the tool uses parseInt(hex, 16).toString(8) for standard numbers and BigInt for very large values to maintain full precision.
Can this tool handle very large hex numbers? expand_more
Yes. For hexadecimal numbers longer than 13 digits (which exceed the precision of standard JavaScript numbers), the tool automatically uses BigInt to perform the conversion with full accuracy. There is no practical limit on the size of hex input.
Is my data secure? expand_more
Absolutely. All conversion happens entirely in your browser using client-side JavaScript. No data is sent to any server, so your hexadecimal input and octal output remain completely private.