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ASCII / Unicode検索

ASCIIとUnicode文字コードの検索と参照

文字変換器
文字またはコードポイントを入力
文字
10進
16進
8進
2進
HTML
ASCIIテーブル
10進16進8進文字説明
000000·NUL (Null)
101001·SOH (Start of Heading)
202002·STX (Start of Text)
303003·ETX (End of Text)
404004·EOT (End of Transmission)
505005·ENQ (Enquiry)
606006·ACK (Acknowledge)
707007·BEL (Bell)
808010·BS (Backspace)
909011·TAB (Horizontal Tab)
100A012·LF (Line Feed)
110B013·VT (Vertical Tab)
120C014·FF (Form Feed)
130D015·CR (Carriage Return)
140E016·SO (Shift Out)
150F017·SI (Shift In)
1610020·DLE (Data Link Escape)
1711021·DC1 (Device Control 1)
1812022·DC2 (Device Control 2)
1913023·DC3 (Device Control 3)
2014024·DC4 (Device Control 4)
2115025·NAK (Negative Acknowledge)
2216026·SYN (Synchronous Idle)
2317027·ETB (End of Trans. Block)
2418030·CAN (Cancel)
2519031·EM (End of Medium)
261A032·SUB (Substitute)
271B033·ESC (Escape)
281C034·FS (File Separator)
291D035·GS (Group Separator)
301E036·RS (Record Separator)
311F037·US (Unit Separator)
3220040 Space
3321041!!
3422042""
3523043##
3624044$$
3725045%%
3826046&&
3927047''
4028050((
4129051))
422A052**
432B053++
442C054,,
452D055--
462E056..
472F057//
483006000
493106111
503206222
513306333
523406444
533506555
543606666
553706777
563807088
573907199
583A072::
593B073;;
603C074<<
613D075==
623E076>>
633F077??
6440100@@
6541101AA
6642102BB
6743103CC
6844104DD
6945105EE
7046106FF
7147107GG
7248110HH
7349111II
744A112JJ
754B113KK
764C114LL
774D115MM
784E116NN
794F117OO
8050120PP
8151121QQ
8252122RR
8353123SS
8454124TT
8555125UU
8656126VV
8757127WW
8858130XX
8959131YY
905A132ZZ
915B133[[
925C134\\
935D135]]
945E136^^
955F137__
9660140``
9761141aa
9862142bb
9963143cc
10064144dd
10165145ee
10266146ff
10367147gg
10468150hh
10569151ii
1066A152jj
1076B153kk
1086C154ll
1096D155mm
1106E156nn
1116F157oo
11270160pp
11371161qq
11472162rr
11573163ss
11674164tt
11775165uu
11876166vv
11977167ww
12078170xx
12179171yy
1227A172zz
1237B173{{
1247C174||
1257D175}}
1267E176~~
1277F177·DEL (Delete)

使い方

1

テキストを貼り付けまたは入力

テキスト、コード、またはデータを入力エリアに入力します。

2

オプションを選択

適用する変換やフォーマットを選択します。

3

結果をコピー

ワンクリックで出力をクリップボードにコピーします。

このツールを使う理由

完全無料

隠れたコストもプレミアムプランもありません — すべての機能が無料です。

インストール不要

すべてブラウザで実行されます。ソフトウェアのダウンロードやインストールは不要です。

プライベート&安全

データはデバイスの外に出ることはありません。サーバーにアップロードされることはありません。

モバイル対応

完全レスポンシブ対応 — スマートフォン、タブレット、デスクトップで利用できます。

ASCII & Unicode Lookup: Master Character Encoding for Development

Key Takeaways

  • ASCII defines 128 characters (0-127) covering English letters, digits, and control characters — the foundation of all modern text encoding.
  • Unicode extends ASCII to over 149,000 characters covering every writing system, emoji, and symbol used worldwide.
  • Understanding character codes is essential for debugging encoding issues, working with special characters, and handling internationalized text.

Every character you see on screen has a numeric code behind it. The letter 'A' is 65 in ASCII, a space is 32, and the grinning face emoji is U+1F600 in Unicode. These codes are the foundation of how computers store, transmit, and display text. An ASCII/Unicode lookup table is an indispensable reference for developers debugging encoding issues, working with special characters, writing parsers, or handling multilingual text in their applications.

Unicode 16.0 defines 154,998 characters covering 168 modern and historic scripts plus thousands of symbols and emoji

Unicode Coverage

When to Use an ASCII/Unicode Lookup

1

Debugging Character Encoding Issues

When you see garbled text (mojibake) instead of the expected characters, looking up character codes helps identify whether the issue is UTF-8, Latin-1, or another encoding.

2

Working with Special Characters in Code

Insert non-printable characters, Unicode escape sequences, HTML entities, or special symbols using their exact code points.

3

Parsing and Validation

When building text parsers or input validators, reference ASCII code ranges to check for digits (48-57), uppercase letters (65-90), or control characters (0-31).

4

Internationalization (i18n) Development

Look up character ranges for specific scripts (CJK, Arabic, Devanagari) when implementing text processing, sorting, or display logic for multilingual applications.

Tips for Character Encoding

ASCII codes 0-31 are control characters (tab is 9, newline is 10, carriage return is 13). Code 127 is DELETE.

UTF-8 is backward-compatible with ASCII — the first 128 characters are identical. This is why ASCII text is valid UTF-8.

In HTML, use named entities or numeric codes for characters with special meaning in markup.

JavaScript uses UTF-16 internally. Characters above U+FFFF (like emoji) use surrogate pairs and have .length of 2.

All character lookups are performed locally in your browser. No text or queries are sent to any external server.

よくある質問