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ASCII to Text Converter

Free online ASCII to Text Converter for 2026. Decode ASCII decimal numbers to readable text and convert text back to ASCII codes — instantly, securely, in your browser.

Enter decimal values 0–127 separated by spaces. Values outside this range are treated as extended ASCII.

What Is ASCII?

ASCII (American Standard Code for Information Interchange) is one of the oldest and most foundational character encoding standards in computing. Created in 1963, it maps integers 0–127 to 128 characters: uppercase and lowercase letters, digits 0–9, punctuation, and 33 non-printable control characters.

This tool lets you decode those numeric codes back to readable text, or encode text back to ASCII numbers. For a full visual chart see our ASCII Table. For binary-level encoding try our Binary to Text Converter.

?How It Works

  1. 1

    Choose ASCII to Text or Text to ASCII using the tabs.

  2. 2

    Paste space-separated decimal codes (e.g. 72 101 108 108 111) or plain text.

  3. 3

    The result appears in real time in the output box — no button needed.

  4. 4

    Use Swap to reverse direction — great for round-trip verification.

  5. 5

    Copy or download the output with one click.

ASCII Quick Reference

65A
97a
480
32Space
33!
64@
10Newline
9Tab

See the complete 128-character reference on our ASCII Table page.

Common Use Cases

  • Programming: Decode character codes from source code, scripts, and byte arrays.
  • CTF & Puzzles: Solve capture-the-flag challenges that encode flags as ASCII decimal sequences.
  • Education: Teach students how text is stored at the byte level in computer memory.
  • Data Analysis: Parse legacy system outputs that represent text as ASCII code sequences.

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Frequently Asked Questions

What is ASCII?
ASCII assigns numeric values 0–127 to characters including letters, digits, punctuation, and control codes. The number 65 represents A, 97 represents a, and 32 represents a space.
How do I convert ASCII to text?
Paste space-separated decimal numbers into the input above. The tool converts each number to its ASCII character instantly. For example, "72 101 108 108 111" becomes "Hello".
What is the ASCII code for a space?
The ASCII code for a space is 32. Other common codes: Tab = 9, Newline = 10, Carriage Return = 13. See the full chart on our ASCII Table.
Can I convert text to ASCII numbers?
Yes. Switch to the Text to ASCII tab and type or paste any text. Each character is instantly converted to its decimal ASCII code.
What is the difference between ASCII and UTF-8?
ASCII covers only 128 characters. UTF-8 is a superset supporting over a million Unicode characters and is backward-compatible with ASCII for values 0–127. For full Unicode support, see our Decimal to Text Converter.
What are ASCII control characters?
Control characters are non-printable ASCII codes 0–31 and 127. They include newline (10), tab (9), and carriage return (13), used to control text formatting and terminal behaviour.
Is my data safe?
Yes. All processing happens locally in your browser. Nothing is sent to any server or stored anywhere.
Why does my ASCII output show a question mark?
Values outside the printable ASCII range (32–126) may display as replacement characters. Numbers below 32 are control characters; numbers above 127 are extended ASCII or Unicode. Use our Decimal to Text tool for full Unicode support.