How are multi-byte characters handled?

Text is encoded as UTF-8 bytes first, so emoji and accented characters produce multiple binary/octal groups.

What if my binary/octal input has a bad value?

You'll see a clear error naming the invalid group so you can fix it.

Is the byte order significant?

Yes, bytes are processed left to right in UTF-8 encoding order.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

Binary/Octal Text Converter

Convert text to binary or octal codes and back.

Support

Works Offline

Privacy First

No Login

No API

Direction

Base

Text

Binary code

01001000 01100101 01101100 01101100 01101111

About the Binary/Octal Text Converter

Convert plain text into binary or octal byte codes, or decode binary/octal codes back into readable text, based on UTF-8 encoding.

Examples

Text to binary

Hi

Output

01001000 01101001

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

Related tools

Base64 to Image Converter

Converters

Convert between base64/data URI text and image previews.

Excel Column Name Converter

Converters

Convert between spreadsheet column numbers and letters.

Number Base Converter

Converters

Convert numbers between binary, octal, decimal, hex, and custom bases.

Number to Words & Currency Formatter

Converters

Spell numbers out in words or format them as currency, ordinals and locale text.

Roman Numeral Converter

Converters

Convert between numbers and Roman numerals.

Unit Converter

Converters

One converter for length, weight, temperature, time, data size, speed and more — with unit search.

Frequently asked questions

Comments

No login needed. Comments appear after a quick review.

Loading comments…

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser