Build, share, and learn JavaScript, CSS, and HTML with our online code editor. Discover web applications and hire talent from the world’s largest community of front end developers and designers.
![CodePen - Front End Developer Playground & Code Editor in the Browser](https://cdn-ak-scissors.b.st-hatena.com/image/square/b03f672cb06c9cde2f6ac91e7992e03ca34c33fc/height=288;version=1;width=512/https%3A%2F%2Fstatic.codepen.io%2Fassets%2Fsocial%2Ffacebook-default-05cf522ae1d4c215ae0f09d866d97413a2204b6c9339c6e7a1b96ab1d4a7340f.png)
End script and style with newline? Support e4x/jsx syntax Use comma-first list style? Detect packers and obfuscators? (unsafe) Preserve inline braces/code blocks? Keep array indentation? Break lines on chained methods? Space before conditional: "if(x)" / "if (x)" Unescape printable chars encoded as \xNN or \uNNNN? Use JSLint-happy formatting tweaks? Indent <head> and <body> sections? Keep indentat
Scriptular is a javascript regular expression editor. Inspired by Rubular it gives you a simple way to test javascript regular expressions as you write them. Start by entering a regular expression and then a test string. Or give this example a try. Learn more about regular expressions in javascript.
Dirty Markup [ad#ad-2] Dirty Markupはウェブ制作者がよく使う下記のツールをまとめたような感じです。 HTML Tidy CSS Tidy JS Beautify Dirty Markupの使い方は簡単で、右側にコードをペーストし、左側でHTML/CSS/JavaScriptを設定し「Clean」ボタンをクリックするだけです。
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
処理を実行中です
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く