Free OnlineDeveloper Tools
ブラウザで JSON フォーマット、Base64 エンコード、JWT デコード、YAML 変換などを即座に。
95 個のツール · 登録不要 · データはデバイス上に保存されます
JSON
18JSON Formatter & BeautifierFormat and beautify JSON with syntax highlightingJSON ValidatorValidate JSON syntax and structureJSON DiffCompare two JSON objects and highlight differencesJSON Pretty PrintPretty print JSON with customizable indentation for readabilityJSON MinifierMinify and compact JSON by removing whitespaceJSON to YAMLConvert JSON to YAML formatJSON to CSVConvert JSON array to CSV formatJSON to TypeScriptGenerate TypeScript interfaces from JSONJSON to C# ClassGenerate C# classes from JSONJSON to Go StructGenerate Go structs from JSONJSON to PythonGenerate Python dataclasses from JSONJSON to JavaGenerate Java POJO classes from JSONJSON to DartGenerate Dart classes from JSON with fromJson and toJsonJSON to XMLConvert JSON to XML formatJSONPath テスターJSONデータに対してJSONPath式をテストし、一致した結果を確認できますJSON Schema ValidatorJSON データを JSON Schema (Draft 7) に対してブラウザ上で検証JSON String EscapeJSON 文字列内の特殊文字をエスケープ・アンエスケープJSON to TOML 変換ツールJSONをTOML形式に変換
YAML
2Base64エンコーディング
7Base64 Encode OnlineEncode text or binary data to Base64Base64 Decode OnlineDecode Base64 encoded textBase64 Image DecoderDecode Base64 data URIs back to viewable imagesBase64 Image EncoderEncode images to Base64 data URIs for HTML and CSSBase64 URL-safeEncode and decode URL-safe Base64 (Base64url)Base64 to HexConvert between Base64 and hexadecimalBase64 File EncoderEncode any file to Base64 — PDF, ZIP, images, and more
URL
3JWT
2時刻
6Timestamp ConverterConvert Unix timestamps to human-readable dates and backCron Expression ParserParse cron expressions into human-readable descriptions and preview next run timesCron Expression GeneratorGenerate cron expressions visually with a step-by-step builderCron Expression ValidatorValidate cron expressions and see a detailed field-by-field breakdown日付計算ツール2つの日付の差を年・月・日などで計算タイムゾーン変換世界中のタイムゾーン間で日時を変換する
UUID
10UUID v4 GeneratorGenerate cryptographically random UUID v4UUID v1 GeneratorGenerate time-based UUID v1 with embedded timestampUUID v7 GeneratorGenerate time-ordered UUID v7 for database primary keysUUID v3 GeneratorGenerate deterministic name-based UUID v3 using MD5UUID v2 GeneratorGenerate DCE Security UUID v2 with local domain and IDULID GeneratorGenerate lexicographically sortable unique IDsNanoID GeneratorGenerate tiny URL-safe unique IDs with customizable alphabetCUID GeneratorGenerate collision-resistant unique IDs (CUID v1)CUID2 GeneratorGenerate secure next-generation CUID2 identifiersUUID DecoderDecode and inspect UUID structure, version, and embedded data
ハッシュ
7MD5 Hash GeneratorGenerate MD5 hash from any textSHA-1 Hash GeneratorGenerate SHA-1 hash from any textSHA-256 Hash GeneratorGenerate SHA-256 hash from any textSHA-384 Hash GeneratorGenerate SHA-384 hash from any textSHA-512 Hash GeneratorGenerate SHA-512 hash from any textHMAC GeneratorGenerate HMAC signatures with SHA-256, SHA-384, or SHA-512Hash IdentifierIdentify hash type by length and format — MD5, SHA-1, SHA-256, and more
CSV
7CSV to JSONConvert CSV data to JSON array or object formatCSV to MarkdownConvert CSV to a Markdown tableCSV to HTML TableConvert CSV to an HTML tableCSV FormatterFormat and normalize CSV data with custom delimiter optionsCSV to SQLGenerate SQL INSERT statements from CSV dataCSV to XMLCSV データを XML 形式に変換CSV to YAMLCSV データを YAML オブジェクト配列に変換
テキスト
11Word CounterCount words, characters, sentences, paragraphs and estimate reading timeCase ConverterConvert text between uppercase, lowercase, title case, camelCase, snake_case and moreLorem Ipsum GeneratorGenerate lorem ipsum placeholder text with configurable paragraphs and wordsLine SorterSort lines alphabetically, by length, reverse or randomize line orderDuplicate Line RemoverRemove duplicate lines from text, keeping only unique linesText DiffCompare two texts side by side and highlight line-by-line differencesRegex TesterTest regular expressions against a string and see all matches highlightedMarkdown PreviewPreview Markdown text rendered as HTML in real timePassword GeneratorGenerate strong random passwords with customizable length and character setsSlug GeneratorConvert any text into a clean URL-friendly slugString EscapeJavaScript、Python、JSON用の文字列エスケープ・アンエスケープ
カラー
6Color ConverterConvert colors between HEX, RGB, HSL and HSV formats with a visual color pickerColor Contrast CheckerCheck WCAG AA and AAA contrast ratio between foreground and background colorsColor Palette GeneratorGenerate complementary, analogous, triadic and tetradic color palettes from any base colorColor Name FinderFind the closest CSS named color for any HEX or RGB valueCSS Gradient GeneratorBuild linear and radial CSS gradients visually and copy the CSS codeTailwind Color FinderFind the nearest Tailwind CSS color class for any HEX or RGB value
XML
6XML FormatterFormat and pretty-print XML with syntax highlightingXML MinifierMinify XML by removing whitespace and commentsXML ValidatorValidate XML syntax and check for well-formedness errorsXML to JSONConvert XML to JSON formatXML to YAMLConvert XML to YAML formatXPath TesterTest XPath expressions against XML and see all matching nodes
HTML
5CSS
3TOML
2すぐに使える開発者ツール
ToolDeck は、摩擦のない高速で信頼性の高いツールを求める開発者向けに構築された、無料のオンラインユーティリティのコレクションです。JSON のフォーマット・バリデーション、Base64 のエンコード・デコード、JWT トークンの検査、JSON と YAML の変換、URL エンコード、Unix タイムスタンプ変換—登録・インストール不要でブラウザからすぐに使用できます。すべてのツールはクライアントサイドで動作するため、データはデバイス上に留まります。