Convert text to binary code and binary back to text. Each character shown as an 8-bit group.
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Text to Binary
Binary to Text
Convert Binary is a free online tool that converts text to binary code and binary code back to text. Each character is represented as an 8-bit binary group separated by spaces. Useful for learning, encoding messages, or debugging data transmission.
For text to binary, each character is converted to its Unicode code point then padded to 8 bits. For binary to text, each 8-bit group is parsed with parseInt(group, 2) and then String.fromCharCode() converts it back to a character. Everything runs in your browser.
Enter a number
Type a number in binary, decimal, hexadecimal, or octal format.
Select input base
Choose the input number base: base 2 (binary), 8 (octal), 10 (decimal), or 16 (hex).
Convert
All equivalent representations in all other bases are shown simultaneously.
Copy any result
Click the copy button next to any result to copy that value to your clipboard.
Secret Messages
Encode a plaintext message into binary to share with others learning about data encoding or for fun puzzles.
Data Transmission Debugging
Decode binary payloads received from serial ports, Bluetooth, or other hardware interfaces back to readable text.
CS Classroom Exercises
Students can verify their hand-computed text-to-binary conversions instantly and learn how ASCII encoding works.
CTF Challenges
Capture-the-flag competitions often encode clues in binary; quickly decode 8-bit groups to reveal the hidden text.
Protocol Analysis
Inspect binary-encoded protocol fields by converting 8-bit segments to characters when analysing custom data frames.
Teaching Encoding Concepts
Demonstrate how computers represent text as numbers by showing the binary equivalent of any typed sentence.
Bidirectional Conversion
Convert text to binary and binary back to text in the same tool without switching between different pages.
8-Bit Standard Groups
Output uses the universally understood 8-bit-per-character format, matching how modern computers store ASCII and extended characters.
Clear Error Feedback
Binary input that contains invalid characters or wrong-length groups triggers a precise error message to help you fix the issue.
One-Click Copy
Copy the full binary or decoded text output instantly to paste into code, documents, or messaging apps.
No Server Required
All encoding and decoding happens in your browser, so your text stays private and conversions are instantaneous.
Handles Extended Characters
Supports standard ASCII and extended characters beyond plain English, covering accented letters and common symbols.
Also Known As
Binary To Decimal
Convert between binary, decimal, hex and octal number systems
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Convert Timestamp
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Count Words
Count words, characters, sentences and paragraphs in text
Convert Datetime
Convert datetime between different formats and timezones
Encode Image to Base64
Encode any image file to Base64 string for embedding in HTML or CSS
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