Text to Binary Converter

Binary is the base-2 number system, using only the digits 0 and 1. Every piece of data in a computer — text, images, audio — is ultimately stored as long sequences of binary digits called bits. Eight bits make a byte.

Each character is first mapped to a number by a character encoding (such as ASCII or UTF-8), and that number is then written in base-2. For example the letter A is code 65, which is 01000001 in 8-bit binary.

The capital letter A has ASCII code 65, which is 01000001 in binary.

HELLO in 8-bit ASCII binary is 01001000 01000101 01001100 01001100 01001111.

Computer hardware is built from switches (transistors) that have two stable states — off and on. Those two states map perfectly to 0 and 1, making binary the most reliable and simple way to store and process information electronically.

ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding that maps 128 characters — the English letters, digits 0–9, punctuation and control codes — to the numbers 0–127. For example A is 65 and the space is 32.

Extended ASCII uses the full 8 bits of a byte to represent 256 characters (0–255), adding accented letters, symbols and box-drawing characters. The most common form is ISO-8859-1, also called Latin-1.

Unicode is a universal character standard that assigns a unique number, called a code point, to every character in every writing system — over 149,000 characters. Code points are written like U+0041 for A. Unicode is encoded into bytes using UTF-8, UTF-16 or UTF-32.

UTF-8 is the dominant encoding of Unicode on the web. It uses one to four bytes per character: ASCII characters stay one byte (so it is backward-compatible), while other characters use more. Its efficiency and compatibility make it the default for almost all modern text.

UTF-16 encodes each Unicode character as one or two 16-bit code units (two or four bytes). Characters in the Basic Multilingual Plane use a single unit; rarer characters use a surrogate pair. It is used internally by JavaScript, Java and Windows.

UTF-32 uses a fixed four bytes (32 bits) for every Unicode code point. It wastes space but makes indexing trivial because every character is the same width. It is mostly used internally rather than for storage or transmission.

Character encoding is the system that maps characters to numbers (and then to bytes) so computers can store and exchange text. Without a shared encoding, the same bytes could be interpreted as different characters — which is what causes “mojibake” (garbled text).

Both represent the same underlying values. Binary (base-2) uses 0 and 1; hexadecimal (base-16) uses 0–9 and A–F. One hex digit equals exactly four binary bits, so hex is a compact, human-readable shorthand for binary — a byte is 8 bits or just 2 hex digits.

Split the binary into 8-bit groups (one byte each), convert each group to its decimal value, then look up that number in the character encoding. This tool does it automatically and supports ASCII, Latin-1, UTF-8, UTF-16 and UTF-32.

There are 8 bits in one byte. A byte can represent 256 different values (0–255), which is enough for one ASCII or Latin-1 character.

Look up each character’s code (for example A = 65), convert that number to base-2, and pad it to 8 bits. So A → 65 → 1000001 → 01000001. Repeat for every character and join with spaces.

The space character has ASCII code 32, which is 00100000 in binary.

Digits are characters too: 0 is code 48 (00110000), 1 is 49 (00110001), up to 9 which is 57 (00111001). Note this is the character “5”, not the number five — the number five on its own is just 101.

Yes. Choose UTF-8 (or UTF-16/32) and the converter encodes emojis, accented letters and any script correctly, showing the multi-byte sequences. Plain 7-bit ASCII only covers basic English characters.

A code point is the unique number Unicode assigns to a character, written like U+1F600 for 😀. Encodings such as UTF-8 then turn that code point into a specific sequence of bytes.

It uses the browser’s native, standards-compliant TextEncoder/TextDecoder for UTF conversions and exact arithmetic for ASCII and Latin-1, so every conversion is precise and reversible. Conversions run entirely on your device.

Yes. It is completely free with no sign-up, runs entirely in your browser so nothing you type or upload is sent to a server, and works offline once loaded. History and favourites are stored only on your device.

Yes. Upload a TXT, CSV, JSON, XML or HTML file and its text content is loaded into the converter, where you can encode it to binary, hex or any other view and download the result.

A bit is a single 0 or 1. A byte stream is the continuous sequence of bytes that represents your data in memory or on the wire. The developer view shows your text as a raw byte array, a binary stream and a hex dump.

Shannon entropy measures how unpredictable the bytes are, from 0 (all identical) to 8 bits per byte (completely random). High entropy can indicate compressed or encrypted data; plain English text typically sits around 4–4.5 bits per byte.

In UTF-8, only the basic ASCII characters fit in one byte. Accented letters, symbols and non-Latin scripts have higher code points that require two, three or four bytes — which is why “café” is 5 bytes, not 4.

It shows your text as one continuous run of bits with no separators — the form data actually takes when transmitted or stored. The packet and segmentation views then group those bits into bytes and words for readability.

Yes. This tool uses the standard most-significant-bit-first (big-endian) order within each byte, matching how ASCII and UTF encodings are defined. The leftmost bit has the highest place value.

Text input is ordinary characters you want to encode. Binary input is a string of 0s and 1s you want to decode back into characters. The smart detector recognises which one you have pasted and offers the right conversion.

Switch the output to decimal: each character is shown as its numeric code, for example HELLO → 72 69 76 76 79. The character analysis table also lists the ASCII code for every character.

Yes. You can copy any result, or download the binary as TXT, the character analysis as CSV or JSON, and print or save the whole report as a PDF.