Formatters tools

Free online JSON formatter and validator with syntax highlighting and error line numbers. Use as default for beautify+validate+minify in one place; for two-file comparison use json-diff, for schema generation use json-schema-generator. Input: JSON ≤10MB. Returns formatted JSON or line-numbered error. 100% private.

• Beautify, minify, and validate JSON
• Line-level syntax errors with position hints
• Syntax highlighting and optional sorting
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Format and validate HTML with indentation and error reporting. Use as default HTML tool; for minifying production HTML use html-minifier, for converting HTML to Markdown use html-to-markdown. Input: HTML ≤10MB. Returns formatted HTML or validation errors. 100% client-side.

• Format, validate, and minify HTML
• Syntax error reporting with location hints
• Custom indentation and attribute wrapping
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Format or minify CSS with indentation control. Use as default CSS tool handling both directions; css-minifier URL is a noindex alias. Input: CSS ≤10MB. Returns formatted or minified CSS. 100% client-side.

• Beautify compressed CSS with custom indentation
• Syntax highlighting for selectors and properties
• Sort properties and remove empty rules
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Minify JS for production or beautify minified JS for debugging. Use for JS only; for JSON use json-formatter, for CSS use css-formatter. Input: JS text ≤10MB. Returns minified or beautified JS or syntax error. 100% client-side.

• Minify JavaScript for production bundles
• Beautify minified code for debugging
• Syntax validation before minification
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Free online SQL formatter with indentation and keyword casing. Format queries privately in browser.

• Format SQL across 11+ SQL dialects
• Control keyword case and comma placement
• Collapse or expand long statements
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Format and validate XML with indentation and well-formedness checks. Use for XML; for JSON use json-formatter, for XML to JSON conversion use xml-to-json. Input: XML ≤10MB. Returns formatted XML or line-numbered error. 100% client-side.

• Beautify, minify, and validate XML documents
• Real-time error detection with line numbers
• Custom indentation and newline handling
• +1 more

Format and validate YAML with syntax checks. Use for YAML editing; for JSON to YAML conversion use json-to-yaml, for TOML/YAML/JSON cross-conversion use toml-converter. Input: YAML ≤10MB. Returns formatted YAML or error. 100% client-side.

• Format and validate YAML documents
• Minify output for compact configuration
• Syntax error reporting with location hints
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Analyze text for word count, readability, and language stats. Paste and get instant insights.

• Count words, characters, and sentences
• Flesch reading ease and grade level scores
• Keyword density and character frequency
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Compare two JSON documents and highlight added, removed, and changed keys with line-level diff. Use when comparing API responses or configs; for single-document formatting use json-formatter, for validation errors use json-validator. Input: two JSON texts ≤10MB. Returns highlighted diff. 100% client-side.

• Compare two JSON documents side by side
• Highlight additions, removals, and changes
• Structural diff that ignores cosmetic formatting
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Compress JSON by stripping whitespace for smallest payload. Use when preparing production payloads; for readable output use json-formatter or json-beautifier. Input: JSON text ≤10MB. Returns minified JSON or line-numbered error. 100% client-side.

• Strip whitespace and formatting to shrink payloads
• Original vs. minified size comparison
• Real-time minification while you type
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Validate JSON syntax and report errors with line numbers without reformatting. Use when only correctness matters; for auto-fix and formatting use json-formatter. Input: JSON text ≤10MB. Returns valid/invalid + error location. 100% client-side.

• Validate JSON syntax with precise error locations
• Line and column reporting for quick fixes
• Handles deeply nested and large documents
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Convert docker run commands to Docker Compose YAML files online for free. Simplify container orchestration with this easy migration tool.

• Convert docker run commands to Compose YAML
• Parses ports, volumes, env vars, and labels
• Detects docker CLI flags automatically
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View and navigate YAML with collapsible tree and validation. Use for read-only inspection; for editing/validation use yaml-formatter. Input: YAML ≤10MB. Returns tree view or error. 100% client-side.

• Pretty-print YAML with syntax highlighting
• Validate structure and report problems
• Open YAML files from disk
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Build JS benchmarks comparing snippets. Use when comparing speed; for regex testing use regex-tester. Input: JS snippets. Returns ops/sec table. 100% client-side, files never leave browser.

• Time JavaScript snippets with high precision
• Compare multiple implementations side by side
• Configurable iterations and warm-up runs
• +1 more

Escape or unescape JSON strings. Use when embedding JSON; for formatting use json-formatter. Input: JSON ≤10MB. Returns escaped string. 100% client-side, files never leave browser.