ASCII to Octal Converter
Convert ASCII text to octal instantly (e.g., 'A' = 101). Free online ASCII to octal converter for developers.
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Your data is converted entirely in your browser. No data is sent to any server.
Table of Contents
What is ASCII ↔ Octal conversion?
ASCII ↔ Octal conversion converts text into octal byte values (and back). Octal is a base-8 representation that still appears in some systems and legacy tooling.
This tool treats text as UTF-8 bytes for numeric formats (decimal/hex/binary/octal). Non-ASCII characters (like emoji) will convert to multiple bytes.
How it Works
- Paste input (text or octal bytes).
- Convert instantly.
- Copy output.
Octal decoding supports spaced values and compact octal grouped into 3-digit bytes when enabled.
Common Use Cases
When to use ASCII to Octal
- Working with tools/systems that represent bytes in octal
- Inspecting byte-level data in base-8
- Education and debugging numeric base conversions
When to use Octal to ASCII
- Decoding octal dumps back to readable text
- Converting 3-digit byte groups into strings
- Reconstructing messages from octal logs
Examples
Basic conversion
- Input:
Hello - Output:
110 145 154 154 157
Single character
- Input:
A - Output:
101
Want to look up a character code first? Check the ASCII Table for a complete reference.
Conversion Tips
Octal bytes are typically 3 digits
For bytes, octal ranges from 000 to 377. Padding to 3 digits makes grouping obvious.
Frequently Asked Questions
Padding to 3 digits keeps each byte aligned (000–377). This makes copying and parsing safer.
Common ASCII values
- Space: 20 (hex) / 32 (decimal)
- 0-9: 30-39 (hex) / 48-57 (decimal)
- A-Z: 41-5A (hex) / 65-90 (decimal)
- a-z: 61-7A (hex) / 97-122 (decimal)
See the full ASCII Table for all character codes. ASCII Table.