Character to ASCII Code

What is Character to ASCII Code

Last reviewed: April 18, 2026

ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding that defines 128 characters, forming the historical basis for most modern encodings.

Character to ASCII converts every character in your text to its decimal code point using JavaScript's native String.codePointAt. Printable characters return the classic 0–127 ASCII range, while emoji and CJK glyphs return their multi-byte Unicode code points.

This is the workhorse tool for low-level debugging, protocol design, key-derivation checks, and any task where you need to see the underlying numeric representation of a string.

Why use it

• Inspect hidden whitespace or invisible Unicode characters.
• Debug payloads where an extra newline or non-breaking space is causing failures.
• Verify curriculum material explaining ASCII and Unicode.
• Build fixtures for cryptography or parsing unit tests.
• Confirm that a string contains only printable ASCII before sending it to legacy systems.

Features

• Uses Unicode-aware String.codePointAt
• Returns space-separated decimal code points
• Handles emoji and CJK characters correctly
• Ideal for debugging invisible characters
• Zero-upload Character to ASCII Code pipeline, nothing touches a server

How to use Character to ASCII Code

1. Paste text. Drop any string into the input area.
2. Click Run. Each character is converted to a decimal code point.
3. Copy list. Use the space-separated list in your test fixture or debugger.

Example (before/after)

Hi!

72 105 33

Common errors

FAQ

Related tools

Pair this tool with the reverse converter and with hex / binary views for deeper inspection. You can also browse the full Encoders & Decoders category for more options.