ASCIIから10進数へ変換•Text to Decimal & Byte Translation

ASCIIから10進数へ変換 Converter

ASCIIテキストや文字列を10進数の数値列およびバイト配列に変換。区切り文字の自由選択、UTF-8マルチバイト解析、ステップ解説を提供します。

稼働中13 characters

入力値13 characters

Options & Delimiters▼

Output Delimiter

Character Encoding

Strict ASCII Validation

Error on non-ASCII characters (>127) instead of fallback conversion.

Presets:

計算結果13 decimal codes

72 101 108 108 111 44 32 87 111 114 108 100 33

Total Codes13

Characters13

Bytes (UTF-8)13

Control Codes0

🔍 Character-by-Character Diagnostics Breakdown

Showing 13 of 13 tokens

#	Character	Decimal	Hex (0x)	Binary (8-bit)	Type	Description

ステップごとの計算手順

Type any decimal value above to generate step-by-step arithmetic proof.

Standard ASCII Reference Chart (0–127)

Cross-reference characters, decimal numbers, hex notation, and binary forms.

Character	Decimal	Hex (0x)	Binary	Category	Description
NUL	0	0x00	00000000	Control	Null character
\t (HT)	9	0x09	00001001	Control	Horizontal Tab
\n (LF)	10	0x0A	00001010	Control	Line Feed (Newline)
\r (CR)	13	0x0D	00001101	Control	Carriage Return
[Space]	32	0x20	00100000	Printable	Standard Space
!	33	0x21	00100001	Printable	Exclamation mark
0	48	0x30	00110000	Digit	Digit Zero
9	57	0x39	00111001	Digit	Digit Nine
A	65	0x41	01000001	Uppercase	Latin Capital A
B	66	0x42	01000010	Uppercase	Latin Capital B
Z	90	0x5A	01011010	Uppercase	Latin Capital Z
a	97	0x61	01100001	Lowercase	Latin Small a
z	122	0x7A	01111010	Lowercase	Latin Small z
~	126	0x7E	01111110	Printable	Tilde
DEL	127	0x7F	01111111	Control	Delete character

よくある質問 (FAQ)

Find answers to common questions about converting ASCII text to decimal numbers.

01How do you convert ASCII text into decimal numbers?▼

To convert ASCII text into decimal numbers, each character is looked up in the standard ASCII table to find its corresponding 7-bit or 8-bit integer code. For example, in the word 'Hi', the uppercase letter 'H' has an ASCII decimal value of 72, and the lowercase letter 'i' has an ASCII decimal value of 105. The resulting decimal representation is 72 105.

02What output delimiter formats can I choose?▼

You can format your decimal output using standard Space (72 105), Comma (72,105), Comma + Space (72, 105), Line Breaks, Semicolons, HTML Entities (Hi), Programming Array format ([72, 105]), continuous digits (no delimiter), or a custom user-defined delimiter.

03How does UTF-8 multi-byte encoding differ from Unicode code points?▼

Standard ASCII characters (0–127) have identical decimal values in ASCII, UTF-8, and Unicode. However, non-ASCII characters like '€' or accented letters occupy multiple bytes in UTF-8: UTF-8 Bytes Mode outputs 3 separate decimal bytes (226 130 172), whereas Unicode Code Points Mode outputs the single code point integer (8364).

04Can I convert large text files or binary payloads?▼

Yes. You can upload .txt files directly into the converter, copy the decimal stream with one click, or export the resulting decimal values as a downloadable file without sending any data over the network.

05How do I reverse decimal numbers back into ASCII text?▼

You can click the Swap (⇄) button in the converter card to instantly toggle into Decimal to ASCII mode, or visit our companion converter to decode decimal byte codes back into readable text.

ASCIIから10進数へ変換 Converter

🔍 Character-by-Character Diagnostics Breakdown

ステップごとの計算手順

Standard ASCII Reference Chart (0–127)

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よくある質問 (FAQ)