---
title: "ASCII to HEX Converter - Convert ASCII strings to HEX format"
description: "Convert text to hexadecimal (HEX) format. Text outside the ASCII range is converted as UTF-8 bytes. You can switch separators, letter case, and line breaks for debugging and data inspection."
canonical_url: "https://web-toolbox.dev/en/tools/ascii-to-hex"
meta:
author: K
"og:description": "Convert text to hexadecimal (HEX) format. Text outside the ASCII range is converted as UTF-8 bytes. You can switch separators, letter case, and line breaks for debugging and data inspection."
"og:image": "https://web-toolbox.dev/og/en/tools/ascii-to-hex-c383707d.png"
"og:image:alt": "ASCII to HEX Converter"
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"og:title": "ASCII to HEX Converter - Convert ASCII strings to HEX format"
---
> Index of every page on this site: [llms.txt](https://web-toolbox.dev/llms.txt)
# **ASCII to HEX Converter**
Convert text to hex as UTF-8 bytes
**ASCII text**
**HEX result**
Read-only
## What is ASCII to HEX Converter?
ASCII to HEX Converter turns text into hexadecimal notation. It is useful for checking which bytes make up a string or for preparing HEX output while debugging.
The input is read as UTF-8 bytes, so Japanese text and emoji appear as multiple bytes. The result updates as you type.
## How to Use
1. Enter the text you want to convert.
2. Choose the output format, letter case, and line breaks.
3. Review the HEX result and copy it if needed.
## Main Settings
### Output Format
Choose how the hexadecimal values are separated. Spaces and commas are easy to scan, while the `**0x**` formats are ready to paste into code. The no-separator format produces one continuous string.
```text
Hello
48 65 6C 6C 6F
0x48, 0x65, 0x6C, 0x6C, 0x6F
```
### Case
Show hexadecimal letters in uppercase or lowercase to match an existing codebase or specification.
### Line Breaks
Break long output every 8, 16, or 32 bytes. The line breaks change only the layout; the converted values stay the same.
## Use Cases
- Checking which bytes make up a piece of text
- Comparing data against a protocol or file format specification
- Creating HEX output for debugging logs
- Preparing a hexadecimal array to embed in code
## Things to Keep in Mind
- The text is encoded as UTF-8. Characters outside the ASCII range use more than one byte, so the number of HEX digits does not match the number of characters
**How was your experience?**
Last updated: October 27, 2026
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