Text to Binary Converter — Encode and Decode ASCII Online
Type in either field — the other updates instantly.
Characters: 0
Bits: 0
Type text in the top field to see its binary representation, or paste binary in the bottom field to decode it back to text. Each character is encoded as an 8-bit binary number matching its ASCII/Unicode code point. Everything runs in your browser — nothing is sent to a server.
How it works
- 1 Type or paste text Enter any text in the top field. The binary representation appears below instantly — each character becomes 8 bits separated by spaces.
- 2 Or paste binary to decode You can also work in reverse: paste space-separated binary groups (like 01001000 01101001) into the bottom field and the decoded text appears above.
- 3 Copy the result Use the Copy button next to either field to copy the result to your clipboard, ready to paste wherever you need it.
Your data stays private
All processing happens entirely in your browser. No files, text, or data are ever sent to our servers. You can disconnect from the internet and this tool will still work.
Frequently asked questions
- How does text-to-binary conversion work?
- Each character in your text has a numeric code point — for example, 'A' is 65 in ASCII. The tool converts that number to base 2 (binary) and pads it to 8 bits. So 'A' becomes 01000001.
- What character encoding does the tool use?
- The tool uses the character's JavaScript charCode, which is UTF-16. For characters in the basic ASCII range (0–127), this matches standard ASCII exactly. Extended characters like accented letters produce values above 127.
- Why are the binary groups 8 bits long?
- One byte is 8 bits, and standard ASCII fits within a single byte. Grouping by 8 makes it easy to look up each character separately and matches how computers store characters in memory.
- Can I convert numbers, punctuation, and spaces?
- Yes — any character you can type is supported. Space is 00100000, period is 00101110, and the digit '0' is 00110000 (not to be confused with the binary zero).
- What happens if I paste invalid binary?
- The decoder reads each whitespace-separated group and converts whatever valid binary it finds. Non-binary characters in a group will produce unexpected output, so make sure your input is clean 0s and 1s.