What the site does
The converter on the home page turns text into binary and binary back into text, live, in your browser. The other pages explain the codes behind it: the ASCII table, the binary alphabet, the numbers one byte can hold, and how UTF-8 stores accents and emoji.
Each page is written for one job. The converter pages do the work, the tables are for looking things up, and the guides show the math step by step with examples you can check yourself.
How the numbers are checked
Every table and worked example on this site comes from the same conversion code the tool runs. The stored values are checked against that code each time the site is updated, and an update is stopped if any number differs.
The rules that code follows come from the standards themselves: RFC 20 for ASCII, RFC 3629 for UTF-8, and the Unicode Consortium’s glossary and FAQs. Each page lists the exact sentences it relies on in its Sources section, with the date they were last checked.[1][2][3]
Your text stays in your browser
Conversion happens on your device. Nothing you type is sent to a server unless you choose to email yourself a copy of a result, and that box is optional and only appears after a result.
What the tool does not do
- Numbers as values
- It converts characters. Typing 5 gives the byte for the character 5, not the number five in base 2. The numbers page covers values.
- 7-bit or UTF-16 input
- Binary to text reads 8-bit UTF-8 bytes only.
- Other number systems
- It does not convert to hex, octal or decimal on its own, although the tables show decimal and hex next to each byte.
Who runs this site
This site is run by the company named in the footer of every page, together with its street address. The Contact page explains how to reach it, including how to report a number you think is wrong. There are no accounts, no comments and no ads on this site, only clearly labeled paid links that may appear after a result.
Sources, last checked October 12, 2026
- RFC 20: ASCII format for Network Interchange (IETF, 1969)
This coded character set is to be used for the general interchange of information among information processing systems, communication systems, and associated equipment.
- RFC 3629: UTF-8, a transformation format of ISO 10646 (IETF, 2003)
In UTF-8, characters from the U+0000..U+10FFFF range (the UTF-16 accessible range) are encoded using sequences of 1 to 4 octets.
- Glossary of Unicode Terms (Unicode Consortium)
A multibyte encoding for text that represents each Unicode character with 1 to 4 bytes, and which is backward-compatible with ASCII.