Dev Tools

Utilities for developers

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JSON Formatter & Validator

Format, beautify, and validate JSON data online for free. Make your JSON readable with proper indentation. Detect syntax errors instantly.

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UUID Generator

Generate random UUIDs (Universally Unique Identifiers) instantly online. Create single or bulk v4 UUIDs for your applications, databases, and APIs.

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Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Support for seconds and milliseconds. Perfect for developers and debugging.

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Base64 Encode/Decode

Encode text to Base64 or decode Base64 strings online. Fast, free, and secure browser-based conversion for developers.

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Password Generator

Generate strong, secure random passwords online. Customize length and character types. Uses cryptographically secure random generation.

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Lorem Ipsum Generator

Generate placeholder text for your designs and mockups. Create paragraphs, sentences, or words of Lorem Ipsum text instantly.

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URL Encoder/Decoder

Encode or decode URLs and query strings online. Supports both encodeURIComponent and encodeURI methods for different use cases.

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HEX to RGB Color Converter

Convert colors between HEX, RGB, and HSL formats instantly. Free online color converter with live preview and easy copy functionality.

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JSON to CSV Converter

Convert JSON arrays of objects to CSV format online. Choose comma, semicolon, or tab delimiter. Free, private, and runs in your browser.

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Regex Tester

Test regular expressions against sample text. See matches, indices, and a highlighted preview. Supports flags: global, ignore case, multiline.

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HTML Entity Encoder / Decoder

Encode special characters to HTML entities or decode entities to plain text. Handles ampersands, quotes, angle brackets, and common symbols.

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CSV to JSON Converter

Convert CSV to JSON array of objects online. First row becomes keys. Choose comma, semicolon, or tab delimiter. Free, private, runs in your browser.

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Case Converter

Convert text between camelCase, PascalCase, snake_case, kebab-case, and Title Case. Free online tool for developers and writers.

Dev Tools
All Tools | DejoTools