Why do I get an error when pasting binary?

Each binary group must be exactly 8 bits and contain only 0s and 1s. Groups must be separated by spaces. For example: 01001000 01101001 for "Hi". Missing leading zeros or extra characters will cause a parse error.

Does this work with non-ASCII characters (emoji, accented letters)?

Partially. Characters above code point 127 require multi-byte UTF-8 encoding. This tool handles single-byte ASCII (code points 0–255). For multi-byte Unicode, the output may be unexpected.

What is the hex view?

The optional hex view shows each character's code point in hexadecimal. This is useful for debugging because hex is more compact than binary — one hex digit represents four bits, so a byte is two hex digits.

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How to Convert Binary to Text Free — ASCII Translator (2026)

By Rui Barreira · Last updated: 18 June 2026

Binary-to-text conversion is a foundational task in computer science education and low-level debugging. Every character displayed on a screen has an underlying numeric code (its ASCII or Unicode code point), and that number can be represented in binary (base 2). This tool converts both ways: text to its binary representation, and binary groups back to readable text.

How to Use

Select Text → Binary or Binary → Text using the toggle buttons.
Type or paste your input into the text area.
The result appears immediately below, with an optional hex view for extra detail.
Use the Copy button to copy the output, or Swap direction to flip modes.

How It Works

For text-to-binary, each character is converted to its ASCII decimal code point, then that number is written in 8-bit binary with leading zeros. The space character (ASCII 32) becomes 00100000; the letter H (ASCII 72) becomes 01001000. For binary-to-text, each 8-bit group is parsed as a binary integer and converted to the corresponding ASCII character via String.fromCharCode().

What Is ASCII?

ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding that maps 128 characters — uppercase and lowercase letters, digits, punctuation, and control characters — to numbers 0–127. The 8th bit is used for extended ASCII variants. Modern systems use Unicode (UTF-8) which is a superset of ASCII for the first 128 code points, so this tool handles standard ASCII text correctly.

Frequently Asked Questions

Why do I get an error when pasting binary?: Each binary group must be exactly 8 bits and contain only 0s and 1s. Groups must be separated by spaces. For example: 01001000 01101001 for “Hi”. Missing leading zeros or extra characters will cause a parse error.
Does this work with non-ASCII characters (emoji, accented letters)?: Partially. Characters above code point 127 require multi-byte UTF-8 encoding. This tool handles single-byte ASCII (code points 0–255). For multi-byte Unicode, the output may be unexpected.
What is the hex view?: The optional hex view shows each character's code point in hexadecimal (base 16). This is useful for debugging because hex is more compact than binary — one hex digit represents four bits, so a byte is two hex digits.
Is this free?: Yes, entirely free with no signup required.

Frequently Asked Questions

Why do I get an error when pasting binary?: Each binary group must be exactly 8 bits and contain only 0s and 1s. Groups must be separated by spaces. For example: 01001000 01101001 for "Hi". Missing leading zeros or extra characters will cause a parse error.
Does this work with non-ASCII characters (emoji, accented letters)?: Partially. Characters above code point 127 require multi-byte UTF-8 encoding. This tool handles single-byte ASCII (code points 0–255). For multi-byte Unicode, the output may be unexpected.
What is the hex view?: The optional hex view shows each character's code point in hexadecimal. This is useful for debugging because hex is more compact than binary — one hex digit represents four bits, so a byte is two hex digits.