# Text to Binary Converter

> Convert text to UTF-8 binary bytes and binary back to text.

Page: https://freecalculator.tech/tools/text-to-binary-converter
Last reviewed: 2026-11-03

## Formula

Text is encoded as UTF-8 bytes (RFC 3629); each byte is written as 8 binary digits. Decoding reverses this and rejects invalid UTF-8.

- Source: IETF RFC 3629, UTF-8, a transformation format of ISO 10646.
- ASCII characters use one byte; other characters use two to four bytes.
- Text is encoded as UTF-8 bytes (RFC 3629); each byte is written as 8 binary digits. Decoding reverses this and rejects invalid UTF-8.
- Inputs used: Direction, Text or binary bytes.

## Inputs

- Direction
- Text or binary bytes

## Worked example: Encode “Hi”

H = 01001000, i = 01101001.
1. H is U+0048 = 72 = 01001000.
2. i is U+0069 = 105 = 01101001.

## Common questions

### Why does an emoji produce four bytes?

UTF-8 encodes characters beyond U+FFFF with four bytes.

### What separators can I use when decoding?

Spaces, commas or new lines — or no separator, as long as the total digit count is a multiple of 8.

### Is this ASCII?

UTF-8 is identical to ASCII for the first 128 characters, so plain English text matches ASCII binary.

### How do I use the Text to Binary Converter?

Enter the required values for Direction, Text or binary bytes. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Text to Binary Converter use?

Text is encoded as UTF-8 bytes (RFC 3629); each byte is written as 8 binary digits. Decoding reverses this and rejects invalid UTF-8. The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.

### Can the Text to Binary Converter be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- UTF-8 only; no UTF-16 or legacy code pages.
- Up to 2,000 characters of input.
- Runs entirely in your browser. Conversions are exact for the stated encoding and bit width.
- The result depends on the values you enter for this text to binary converter; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- IETF — https://www.rfc-editor.org/rfc/rfc3629

## Cite this page

- APA: Free Calculator. (2026, November 3). Text to Binary Converter. https://freecalculator.tech/tools/text-to-binary-converter
- MLA: "Text to Binary Converter." Free Calculator, 3 Nov. 2026, https://freecalculator.tech/tools/text-to-binary-converter.
- Link: Text to Binary Converter — Free Calculator, https://freecalculator.tech/tools/text-to-binary-converter