How do you convert the word Hi to binary?

Hi becomes 01001000 01101001 — the 8-bit binary of the ASCII codes 72 and 105.

Can it convert binary back to text?

Yes. Paste binary, octal, decimal or hex on the code side and the text appears instantly.

Text to Binary Converter — Free Online Text to Binary Converter

How do I convert text to binary online?

Type or paste your text into AnyTool Text to Binary Converter and the binary appears instantly on the right — 8 bits per byte, space-separated. You can also switch the output base to octal, decimal or hexadecimal, choose UTF-8 or US-ASCII, and paste binary back on the other side to decode it to text. Everything runs in your browser, so your text is never uploaded.

Live two-way conversion: edit the text side to encode, the code side to decode
Output base 2 (binary), 8 (octal), 10 (decimal) or 16 (hexadecimal)
UTF-8 (correct multi-byte for Unicode and emoji) or US-ASCII encoding
Choose the byte separator, zero-pad each byte, add 0b/0o/0x prefixes, uppercase hex
Decoding tolerates spaces, commas, line breaks and prefixes — 100% client-side

What is

Text to Binary Conversion

Converting text to binary encodes each character as the numeric value of its bytes written in base 2 — for ASCII characters, an 8-bit string such as 01001000 for the letter H. UTF-8 text encodes non-ASCII characters as two to four bytes. The same bytes can be written in octal, decimal or hexadecimal and decoded back to the original text.

Text Tools

Related terms

Binary to TextASCII CodeUTF-8 EncodingHexadecimal

Frequently Asked Questions

Each character maps to a byte value: H is 72 and i is 105. Written as 8-bit binary those are 01001000 and 01101001, so Hi is 01001000 01101001. AnyTool computes this live as you type and can also show the same bytes in octal, decimal or hexadecimal.

With UTF-8 encoding the tool uses the browser TextEncoder, so a character like é becomes two bytes and an emoji like the waving hand becomes four bytes. Those bytes round-trip perfectly when decoded. US-ASCII mode covers only characters 0 to 127 and flags anything outside that range.

Yes. In UTF-8 mode emoji and accents become correct multi-byte sequences that decode back exactly.

The converter is fully bidirectional. Edit the code side and it decodes to text live, ignoring extra spaces, commas, line breaks and 0b/0o/0x prefixes. Invalid digits or out-of-range values show a friendly inline error instead of producing garbage.

Encoding and decoding use the browser native TextEncoder and TextDecoder with no server call, no upload and no tracking. The page works offline after first load, so you can safely convert confidential text, keys or messages.

Yes. All conversion runs in your browser, so your text never leaves your device and it works offline.

Detailed Explanation

Methodology

How the Text to Binary Converter Works

AnyTool converts text to binary entirely in the browser. It encodes the text to bytes with the native TextEncoder (UTF-8) or, in ASCII mode, one byte per character, then writes each byte in the chosen base — base 2 (binary), 8 (octal), 10 (decimal) or 16 (hexadecimal). Formatting options control the byte separator, zero padding to a fixed width, 0b/0o/0x prefixes and hex case. Decoding reverses the process: it splits the input on whitespace, commas, line breaks or fixed-width chunks, strips prefixes, parses each token in the base, and rebuilds the text with TextDecoder.

Bytes come from the browser TextEncoder, so UTF-8 multi-byte characters are exact
Output base 2, 8, 10 or 16 from the same underlying bytes
Optional fixed-width padding (8 bits, 3 octal/decimal digits, 2 hex) and 0b/0o/0x prefixes
Decoding tolerates spaces, commas, line breaks and prefixes, or chunks unseparated input
All encoding and decoding is client-side JavaScript — no server round-trip

How It Works

Two-Way Conversion and Error Handling

The converter is bidirectional and live: editing the text side encodes to the chosen base, while editing the code side decodes back to text, with the side you last touched driving the other. Invalid input is handled gracefully — a token with illegal digits, a value above 255, or a byte sequence that is not valid UTF-8 produces a clear inline message rather than corrupt output. Byte and character counts update as you type.

Edit either side; the other updates instantly with no convert button
Out-of-range values (above 255) and illegal digits are flagged inline
Invalid UTF-8 byte sequences are caught and reported, not silently mangled
US-ASCII mode warns when text contains characters above code point 127
Live byte and character counts for the active side

Privacy & Security

Privacy and Offline Use

Because all conversion runs in the browser, the text and the encoded output never reach a server, there is no account or tracking, and the page works offline after first load. That makes it safe to convert confidential messages, keys or identifiers, and it stays fast because no data is transmitted.

Text to binary: in-browser (AnyTool) vs typical online converters
Capability	AnyTool	Typical online converters
Text handling	Processed in your browser	Often posted to a server
Privacy	Text never leaves device	May log or store submitted text
Direction	Live two-way, edit either side	Often one direction per page
Output bases	Binary, octal, decimal, hex	Frequently binary only
Unicode / emoji	Correct UTF-8 multi-byte	Often ASCII-only or broken
Formatting	Separator, padding, 0x, hex case	Usually fixed
Works offline	Yes (PWA)	No
Cost / signup	Free, no signup	Often ad-heavy or gated

Server-based converters can retain pasted text in logs; AnyTool encodes and decodes every byte locally and uploads nothing.