Binary Translator — Text to Binary Online
Binary Translator is a free binary translator online — type or paste into either box and the other updates instantly. Switch to Number mode to convert decimal numbers to binary and back. Full Unicode and emoji support, and nothing you type ever leaves your browser. No upload, no account, no ads.
What this tool does
Binary Translator is a bidirectional text-binary converter — most online tools make you pick a direction and press a button. Here, the two fields stay in sync live: edit either one and the other recalculates as you type. In Text mode it's a text to binary converter and a binary to text converter on the same screen; flip to Number mode and the same live sync becomes a decimal to binary converter and a binary to decimal converter. A settings toggle switches the binary output between space-separated bytes and one contiguous string.
How to convert text to binary
Stay in Text mode and type or paste your text into the left Text box. The Binary box on the right fills in immediately — no convert button, no wait. Each character becomes an 8-bit byte; tap Copy above the Binary box to grab the result.
Under the hood, this is a standard text to binary code conversion: your
string is encoded as UTF-8 bytes, then each byte is written out as 8 binary digits with
padStart — the same approach any string to binary converter
uses under the hood.
How to convert binary to text
Paste your binary string into the right-hand Binary box — spaces between bytes are fine either way. The tool decodes it and shows the plain text on the left immediately, working as a full binary to text translator, not just a one-off decode.
If the string you pasted isn't valid binary (bad characters, an incomplete trailing byte, or invalid UTF-8), a small notice appears under the box and the Text field simply keeps its last good decode — it never freezes, crashes, or loses your place. That makes it safe to paste a binary code translator to text query even mid-edit.
Decimal ↔ binary (Number mode)
Tap Number in the mode switch above the fields. The left box becomes
Decimal — type any whole number and the Binary box shows
its base-2 form instantly, computed with JavaScript's BigInt so there's no
size limit. It works as both a decimal to binary converter and a
binary to decimal converter: edit the Binary box directly and the Decimal
box updates the other way. A leading minus sign is supported for negative numbers.
Full Unicode & emoji support
Many simple binary converters only handle 7-bit ASCII and silently mangle anything outside it. Binary Translator encodes text as UTF-8 first, so emoji, accented letters, and non-Latin scripts (Japanese, Arabic, Cyrillic, and more) round-trip correctly in both directions. Paste a string with emoji or accented letters and decode it right back to see for yourself.
Frequently asked questions
What is binary code?
Binary code represents data using only two symbols, 0 and 1, because that's what a computer's circuits can reliably distinguish (on or off). Text is standardly grouped into 8-digit chunks called bytes — each byte is one character — and numbers are represented in base-2 place value, the same way decimal uses base-10.
How do I convert text to binary?
Open Binary Translator, stay in Text mode, and type or paste your text into the left Text box. The Binary box on the right fills in immediately — no convert button, no wait. Each character becomes an 8-bit byte, space-separated by default.
How do I convert binary to text?
Paste your binary string (0s and 1s, spaces optional) into the right-hand Binary box. The tool decodes it and shows the plain text on the left immediately. If the string isn't valid binary or you're mid-way through pasting an incomplete byte, a small notice appears and the Text field simply keeps its last good decode.
How do I convert a decimal number to binary?
Switch to Number mode with the toggle above the fields, then type a whole number into the Decimal box. The Binary box shows its base-2 form instantly, computed with JavaScript's BigInt so there's no size limit — it works the same for 12 as it does for a 40-digit number.
How do I convert binary back to a decimal number?
In Number mode, type or paste a binary string into the right-hand Binary box. The Decimal box updates immediately with its base-10 value. A leading minus sign is supported for negative numbers.
How do I read binary code as letters or text?
Split the binary string into groups of 8 digits — each group is one byte. Convert each byte to its decimal value, then look up that number as a character (in ASCII for values 0–127, or as part of a multi-byte UTF-8 sequence for anything higher). Binary Translator's Binary-mode box does exactly this automatically, so you don't have to do it by hand.
Does this binary translator support ASCII, Unicode, and emoji?
Yes. Text is encoded as UTF-8 before conversion to binary, so it correctly handles plain ASCII plus accented letters, non-Latin scripts (Japanese, Arabic, Cyrillic, and more), and emoji — unlike many simple converters that only support 7-bit ASCII and silently mangle anything outside it.
