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開発者ツール
Free online utilities for developers: format, validate, and minify JSON, XML, and HTML instantly. Fast, private, and runs entirely in your browser.
JSON Formatter
Format, validate, and minify JSON with syntax highlighting-ready output.
ツールを開くJSON Validator
Validate JSON syntax and get clear error messages.
ツールを開くJSON Minifier
Compress JSON by removing whitespace and line breaks.
ツールを開くXML Formatter
Beautify and minify XML with proper indentation.
ツールを開くXML Validator
Check if XML is well-formed and get error details.
ツールを開くHTML Formatter
Beautify HTML with clean indentation and structure.
ツールを開くBase64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text.
ツールを開くURL Encoder / Decoder
Encode or decode URL components and query strings safely.
ツールを開くUUID Generator
Generate random UUID v4 identifiers instantly.
ツールを開くHash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes from text.
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