Binary Text Converter

Convert text to 8-bit binary and decode binary back to readable text. Instant, private.

Direction

Byte separator

Plain text

Binary output

01001000 01100101 01101100 01101100 01101111

How binary to text conversion works

Each character is represented as an 8-bit (1-byte) binary number using ASCII encoding. For example, 'A' is 01000001(decimal 65) and 'a' is 01100001 (97). To decode, each space-separated group of 8 bits is converted back to its decimal value and looked up in the ASCII table. For hexadecimal encoding, try Hex to Decimal or Number Base Converter.

Built and maintained by Meet Shah · Last updated 25 July 2026

What this tool is used for

Turning a run of binary from a puzzle or a challenge back into readable text.
Producing a byte-level view of a string for a teaching example.
Checking which bytes a string actually occupies when a length check disagrees.
Building a fixture for code that parses binary-encoded text.
Verifying that a transmission preserved every bit by comparing the binary forms.

Frequently Asked Questions

Which encoding do the bytes represent?: UTF-8, so ASCII characters produce one 8-bit group and accented or non-Latin characters produce two to four. Assuming one byte per character is the classic error — é is 11000011 10101001, two groups.
Why must leading zeros be kept?: Because they carry the byte width. 'A' is 01000001, and writing 1000001 makes the stream undecodable — the reader can no longer find where one character ends and the next begins.
Are the spaces between groups part of the data?: No, they are purely for human readability. The underlying stream has no separators, so any decoder must strip whitespace first — and a stream written without spaces is equally valid.
Is binary text a form of encryption?: No. It is a change of notation with no key, exactly like writing a number in hex. Anyone recognising the format decodes it instantly, so it provides no confidentiality at all.
How much larger is the output?: Eight times, or about nine with separators. That is why binary is used for teaching, puzzles and debugging rather than storage — the raw bytes are obviously preferable for anything real.
Why does a UTF-8 character produce several groups?: Because it is several bytes, and each byte is eight bits. `é` is two bytes and therefore sixteen binary digits — which is why the group count does not match the visible character count for anything non-ASCII.
What order are multi-byte characters written in?: The same order the bytes appear in the encoding, most significant first. Reversing that produces valid-looking binary that decodes to nonsense, which is a common confusion with endianness.

Common errors and gotchas

Grouping in anything other than eights, which shifts every character after the first mistake.
Dropping leading zeros within a byte, which is the same error seen a different way.
Assuming one byte per character, which breaks for anything outside ASCII.
Feeding in binary that a terminal wrapped, inserting real newlines inside a byte.
Treating the conversion as encryption when it is a direct and public representation.