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ASCII Converter

ASCII Converter turns text into decimal ASCII code tokens, decodes decimal, 0x, 0b, and 0o tokens, and shows decimal, hex, binary, octal, and control-character details locally.

Input Text

Characters

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ASCII Converter

Quick Start

1
Enter text, then click Encode for decimal ASCII tokens.
2
Enter decimal, 0x, 0b, or 0o tokens, then click Decode.
3
Review decimal, hex, binary, and octal details.
4
Separate multiple tokens with spaces, commas, or semicolons.
5
Copy the same editor result.

Common Scenarios

Programming

handle encodings and debug string issues

Data analysis

inspect special characters and encodings

Protocol text

inspect ASCII control characters such as LF, CR, TAB, ESC, and DEL without parsing packet bytes or hex dumps

Education

learn computer fundamentals and encoding principles

Security review

spot-check control or non-ASCII code points without a confusable, bidi, IDN, or Trojan Source report

Code lookup

switch between readable text and numeric code tokens

Conversion Parameters & Range

Code input: enter ASCII values in various formats
Binary: with 0b prefix, e.g., 0b1000001
Octal: with 0o prefix, e.g., 0o101 0o141
Decimal: e.g., 65 97 32
Hexadecimal: with 0x prefix, e.g., 0x41 0x61 0x20
Separators: spaces, tabs, new lines, commas, or semicolons. Bare numbers are decimal; use 0x, 0b, or 0o for other bases.
Character ranges: digits 48–57, uppercase 65–90, lowercase 97–122
Common codes: Space (32), 0 (48), A (65), a (97), LF (10), CR (13)
Binary display: ASCII values use 8-bit binary for 0-127; non-ASCII fallback values are shown as Unicode code points instead of byte encodings.
Octal display: 0o-prefixed octal code value, useful for legacy notation and debugging
Decimal display: standard 0–127 values
Hex display: 0x-prefixed (case-insensitive), suitable for programming & debugging
Character preview: shows glyphs; control characters show names
Special characters: supports control chars such as newline (\n) and tab (\t)
Beyond ASCII: characters outside 0-127 show Unicode code point info. This is not an extended ASCII, Windows-1252, Latin-1, or EBCDIC mapping.

ASCII Boundaries

Encode always outputs decimal code tokens in the textarea. Hex, binary, and octal are details, not alternate main output formats.
Decode accepts decimal, 0x hex, 0b binary, and 0o octal tokens. Bare 01000001 is decimal, not binary; bare 41 is decimal, not hex.
ASCII is the 0-127 range. Values above 127 are decoded as Unicode code points, not as extended ASCII, Windows-1252, Latin-1, MacRoman, or EBCDIC.
Control characters 0-31 and 127 show local names such as TAB, LF, CR, ESC, and DEL. A real new line is different from the two literal characters \n.
Character details show the first 100 unique code points, sorted by decimal value with occurrence counts.
This is not a raw binary translator, continuous hex dump decoder, UTF-8 byte decoder, Base64 converter, URL encoder, or HTML escape tool.
You can spot-check control or non-ASCII code points, but this is not a zero-width, confusable, bidi, IDN, Trojan Source, or credential scanner.
ASCII conversion runs locally in your browser. Editor text may stay as a browser draft. If a saved workspace or WebDAV sync is enabled, that text may be saved through that sync. Encode and Decode replace the same editor text; character details and counts are recalculated from the current editor text and are not saved as a separate result state. This tool does not upload files, create attachments, or export files.

Usage Advice

Text input: type or paste the text to convert
Input validation: standard ASCII is 0-127; higher values are Unicode fallback, not extended ASCII
Control characters: handle non-printables carefully
Debugging tip: detect hidden control characters in program output

Limitations & Compatibility

Range limit: standard ASCII supports 0-127 only; Decode accepts Unicode code points up to 0x10FFFF as fallback.
Beyond range: characters outside ASCII show Unicode code point info instead of an extended ASCII table value.
Display limit: some control characters cannot be rendered directly
Compatibility: 128-255 has no single extended ASCII meaning across systems; this page does not choose a code page.

Privacy & Security

ASCII conversion runs locally in your browser. Editor text may stay as a browser draft. If a saved workspace or WebDAV sync is enabled, that text may be saved through that sync. Encode and Decode replace the same editor text; character details and counts are recalculated from the current editor text and are not saved as a separate result state. This tool does not upload files, create attachments, or export files.

FAQ

5

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All tool processing happens locally in your browser.