ASCII to Hex Converter
Convert plain text and ASCII characters into hexadecimal format with live UTF-8 byte stream processing. Supports custom space, comma, 0x, and \x delimiters with instant two-way decoding.
Key Encoder Features
UTF-8 Binary Engine
Accurately converts standard 7-bit ASCII and multi-byte UTF-8 Unicode characters.
Custom Output Delimiters
Choose between spaces (48 65), comma separation, no spaces, 0x prefixes, or \x escapes.
Two-Way Conversion
Seamlessly toggle between ASCII to Hex and Hex to ASCII decoding with automatic token cleaning.
Case Selection
Switch between lowercase (6a 6b) and uppercase (6A 6B) hexadecimal formats on demand.
Live Performance Telemetry
Displays exact character count, total generated bytes, and sub-millisecond calculation benchmarks.
100% Client-Side Privacy
Executed locally in your browser memory. No data is stored, cached, or transmitted to any server.
Common ASCII to Hex Reference Table
Standard ASCII character values mapped to decimal, hexadecimal (base-16), and binary (base-2).
| Character | Decimal | Hexadecimal | Binary (8-bit) |
|---|---|---|---|
| Space | 32 | 20 | 00100000 |
| ! | 33 | 21 | 00100001 |
| " | 34 | 22 | 00100010 |
| # | 35 | 23 | 00100011 |
| $ | 36 | 24 | 00100100 |
| % | 37 | 25 | 00100101 |
| & | 38 | 26 | 00100110 |
| ' | 39 | 27 | 00100111 |
| 0 | 48 | 30 | 00110000 |
| 1 | 49 | 31 | 00110001 |
| 9 | 57 | 39 | 00111001 |
| A | 65 | 41 | 01000001 |
| B | 66 | 42 | 01000010 |
| M | 77 | 4D | 01001101 |
| Z | 90 | 5A | 01011010 |
| a | 97 | 61 | 01100001 |
| b | 98 | 62 | 01100010 |
| m | 109 | 6D | 01101101 |
| z | 122 | 7A | 01111010 |
How to Convert ASCII to Hex Online
Enter Text
Type or paste your text into the left input pane. Multi-byte characters and emojis are fully supported.
Choose Format
Select your preferred delimiter (space, comma, 0x, \x) and toggle between lowercase and uppercase hex.
Copy Output
Your converted hexadecimal output generates instantly. Click "Copy to Clipboard" to paste into your codebase.
Frequently Asked Questions
How does ASCII to Hex conversion work?
Each character in the ASCII or UTF-8 character set is represented by a numerical byte value (0–255). The ASCII to Hex converter reads each byte and formats it as a base-16 (hexadecimal) two-digit number. For example, the capital letter "A" has decimal value 65, which corresponds to hex 41.
Does this converter support Unicode and emojis?
Yes. Our converter uses native UTF-8 binary encoding (TextEncoder/TextDecoder), allowing multi-byte characters such as accented vowels (é, ü), non-Latin scripts (Arabic, Cyrillic, Chinese), and emojis (🚀) to be cleanly converted to their multi-byte hexadecimal byte sequences.
What is the difference between uppercase and lowercase hex?
Hexadecimal values use digits 0–9 and letters A–F. There is no mathematical or computational difference between uppercase (e.g. 48 65 6C 6C 6F) and lowercase (48 65 6c 6c 6f). Uppercase is common in low-level firmware and networking traces, while lowercase is standard in web stylesheets and programming languages.
Can I convert Hexadecimal back to ASCII text?
Yes. Click the "Hex → ASCII" button in the workbench toolbar to switch to decoder mode. Paste your hex string with or without prefixes (0x, \x) or spaces, and the plain text will decode immediately.
Is my data transmitted to any external server?
No. The converter runs 100% client-side in your local browser sandbox using modern JavaScript binary APIs. Your data never touches any external server or telemetry pipeline.
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