Convert Hex to Octal
Quickly convert hexadecimal numbers to octal numbers. Runs entirely in your browser, so your data never leaves your device.
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Output
The result appears here as you type.
How to use Convert Hex to Octal
- 1. Paste the hex number. Enter one or more hexadecimal values you want expressed in base-8. Existing spacing between values is preserved as tokens.
- 2. Set the Separator. Choose the character placed between the resulting octal numbers, useful when converting a batch of values instead of just one.
- 3. Copy the octal result. The output is the same quantity written in base-8. Copy it into a Unix permission field, an older assembler listing or a comparison table.
When to use Convert Hex to Octal
Convert Hex to Octal rewrites a hexadecimal number in base-8. It is the tool to reach for whenever a system or script insists on octal, most commonly Unix file permissions, but the hex value you have is the one that is easy to find.
- Setting a Unix permission from a hex value. You found a file mode written as a hex constant in a config template, but chmod on the command line expects a three-digit octal number instead.
- Reading an old assembly listing. A vintage system's assembler or documentation expresses memory offsets in octal, and you need to translate a hex value from a newer reference to match it.
- Cross-checking base conversions for a class. You are practicing number base conversions and want to verify by hand that your hex-to-octal math for a value like the hex digit a matches the expected result.
Examples
Convert
Input
a
Output
12
About the Convert Hex to Octal tool
Convert Hex to Octal is a free online tool that works entirely inside your web browser. Quickly convert hexadecimal numbers to octal numbers. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 108 Hex utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with the Separator setting, and the result refreshes the moment you change it. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Convert Hex to Octal cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.