OneFreePlace
TOOL #356 · CHARACTER REFERENCE

ASCII Table

A searchable, inspectable reference for true 7-bit ASCII — with every decimal, hex, octal and binary value, control-code notation, HTML/URL representations, exports, and clearly separated legacy 8-bit comparisons.

ASCII 0–127Control codesDecimal / Hex / Octal / BinaryC & caret notationCSV / JSON exportLegacy byte comparisonNo upload
Rows visible128
ReferenceASCII
Range0–127
Selected65 / A
PrivacyLOCAL
GlyphDecHexOctalBinaryNameCategoryC escapeCaretHTMLURLUnicode

ASCII is strictly 7-bit: 0–127. The optional 128–255 tables are legacy encodings and are intentionally labeled separately.

Character inspector

Enter one character, decimal, 0x hex, 0o octal, 0b binary, or U+ notation.

A
A

Representations

Decimal65Hex0x41Octal0o101Binary01000001UnicodeU+0041C escapeACaret notationAHTMLAURL byte%41

Control-code visualizer

Visible result

Control pictures such as ␊ and ␉ are display symbols, not replacements for the original byte values.


Windows-1252
€
U+20AC
ISO-8859-1
€
U+0080
IBM CP437
Ç
U+00C7
Why these are separate
ASCII itself ends at 127. “Extended ASCII” is not one universal table: byte 0x80 can represent different characters depending on the legacy encoding. This comparison prevents the common mistake of treating Windows-1252, ISO-8859-1 and CP437 as interchangeable.


ASCII is 7-bit
Standard ASCII defines values 0 through 127. Values 128–255 belong to later 8-bit encodings, so OneFreePlace labels them separately instead of presenting a misleading “extended ASCII” table.
Control codes are real bytes
NUL, TAB, LF, CR and ESC are not printable glyphs. The table shows control pictures, caret notation and common C-style escapes so you can recognize them without altering their numeric values.
Search across representations
Search for a decimal value, 0x hex, octal, binary, character, Unicode notation, control abbreviation, HTML entity or URL percent byte.
Export for development
Export the currently visible rows as CSV or JSON for documentation, tests, parsers and teaching materials. Everything is generated locally.
Percent values are bytes
The URL column shows the percent form of the ASCII byte, such as %41 for A. Percent-encoding rules decide when a byte actually needs escaping in a URL.
UTF-8 remains the modern default
ASCII is a subset of UTF-8. For new text formats and web content, UTF-8 is normally the right encoding; the legacy views here are for debugging and compatibility.