Developer Tools

Developer tools for programmers and developers — free, no upload.

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Format, validate and minify JSON instantly, with clear error messages.

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Convert any JSON object into TypeScript interfaces, including nested types.

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Convert JSON into a ready-to-use Mongoose schema definition.

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Convert JSON into a CREATE TABLE SQL statement with inferred column types.

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Convert JSON into an Excel file with inferred column types.

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Pick colors and styles per line and get ready-to-paste console.log statements with ANSI escape codes.

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Paste JSON and explore it as a collapsible, searchable interactive tree.

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Convert plain key-value text into JSON, with automatic detection of numbers, booleans and null.

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Paste any SQL query, get it formatted, highlighted, and broken down into its logical clauses.

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Turn any code snippet into a beautiful, shareable screenshot — pick a theme, background and font size, then export as PNG.

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Remove or comment out console statements from your code in one click — filter by type, preview a diff, and export clean code instantly.

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Design a schema, pick field types, and instantly generate realistic mock JSON responses with cURL and JS Fetch snippets.