Text to Binary Converter — UTF-8 Bit String Online

What is Text to Binary?

Text-to-binary is the sequence of two well-defined transformations: text → UTF-8 bytes → base-2. Modern tools should always use UTF-8 as the intermediate encoding — legacy 'ASCII to binary' tools break on anything outside 0–127 (accented Latin, CJK, emoji all fail). This tool uses the browser's built-in TextEncoder, which is a Unicode-conformant UTF-8 encoder. Output is one 8-bit group per byte, so an ASCII character is a single group (e.g. 'A' = 01000001), an accented Latin character is two groups (é = 11000011 10101001), a CJK character is three (中 = 11100100 10111000 10101101), and most emoji are four (😀 = 11110000 10011111 10011000 10000000).

How to convert text to binary online

1. 1Paste text into the input pane. Any Unicode character works.
2. 2Pick a separator (space, comma, hyphen, newline, or none) — default is single space, which is the most readable.
3. 3Copy the binary output. Every 8 consecutive bits is one UTF-8 byte.
4. 4To go back, paste into the Binary to Text tool — separators are ignored on the reverse side.

Use Cases

Key Concepts

UTF-8

The dominant Unicode encoding on the web. Variable-length: 1 byte for ASCII, up to 4 bytes for any Unicode code point.

Bit vs byte

1 byte = 8 bits. Binary text tools group bits into bytes because CPUs, network protocols, and file formats work in bytes.

Tips & Best Practices

• ▸The 'none' separator produces a continuous bit stream — great for hand-verifying, painful to skim.
• ▸Emoji almost always take 4 bytes in UTF-8. Combining sequences like 👨‍👩‍👧 can hit 25+ bytes (four glyphs joined by zero-width joiners).
• ▸If you need old-school pure ASCII-to-binary, the ASCII table tool shows the fixed 7-bit code for characters 0–127.
• ▸Binary output is symmetric with hex — 8 bits ↔ 2 hex chars. The Number Base Converter can flip between them.