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Case Converter

Free online text case converter. Convert between lowercase, UPPERCASE, Title Case, camelCase, snake_case, kebab-case, and more. Character and word count included.

text tools

CSS Minifier & Beautifier

Free online CSS minifier and beautifier. Compress CSS to reduce file size or format for readability. View statistics and color palette extraction.

formatters

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Color Converter

Free online color converter. Convert between HEX, RGB, and HSL color formats. Includes color picker, palette generator, and visual preview.

converters

Byte Calculator

Free online byte calculator. Convert between bytes, KB, MB, GB, TB, and PB. Supports binary (1024) and decimal (1000) bases. Calculate download times.

calculators

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Base64 Encoder & Decoder

Free online Base64 encoder and decoder. Convert text to Base64 and decode Base64 to text instantly. Supports URL-safe encoding and Unicode.

encoders

Cron Expression Parser

Free online cron parser and explainer. Parse cron expressions, see human-readable descriptions, and preview next scheduled runs.

dev utilities

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Diff Checker

Free online diff checker to compare two text blocks. Highlight additions, deletions, and changes with split or unified view. Copy unified diff format.

dev utilities

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CSV to JSON Converter

Free online CSV to JSON converter. Transform CSV data to JSON arrays or objects instantly. Supports custom delimiters, headers, and bidirectional conversion.

converters

HTML Entity Encoder

Free online HTML entity encoder and decoder. Convert special characters to HTML entities and vice versa. Prevent XSS attacks and display special characters safely.

encoders

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Hash Generator

Free online hash generator. Create MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes instantly. Compare algorithms, copy results, and learn about hash functions.

encoders

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JSON Formatter

Free online JSON formatter, validator and beautifier. Format, minify, and validate JSON data instantly.

formatters

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JSON to TypeScript

Free JSON to TypeScript converter. Generate interfaces or type aliases from JSON data instantly. Supports nested objects, arrays, and optional fields.

converters

HTTP Status Codes

Free HTTP status code lookup tool. Search and browse all HTTP response codes with descriptions, use cases, and examples. Complete 1xx-5xx reference.

dev utilities

JSON to YAML Converter

Free online JSON to YAML converter and YAML to JSON converter. Transform between formats instantly with proper formatting.

converters

Lorem Ipsum Generator

Free Lorem Ipsum generator. Create paragraphs, sentences, or words of placeholder text. Supports HTML output and customizable length.

generators

Image to Base64 Converter

Free online image to Base64 encoder. Convert PNG, JPEG, GIF, WebP, SVG images to Base64 strings instantly. Generate data URIs, HTML img tags, and CSS backgrounds.

encoders

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JSON Validator

Free online JSON validator with detailed error reporting. Check JSON syntax, find errors with line numbers, view statistics, and auto-fix common issues.

validators

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JWT Decoder

Free online JWT decoder. Decode and inspect JWT tokens, view header and payload claims, check expiration times, and understand token structure.

dev utilities

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Markdown Preview

Free online Markdown preview tool. Write Markdown and see real-time HTML preview with syntax highlighting, word count, and reading time.

formatters

Number Base Converter

Free online number base converter. Convert between binary, octal, decimal, and hexadecimal instantly with bit information.

converters

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Password Generator

Generate cryptographically secure passwords instantly. Customize length, characters, and complexity.

generators

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Regex Tester

Free online regex tester with real-time matching, capture groups, and a library of common patterns. Debug and test your regular expressions instantly.

validators

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Unix Timestamp Converter

Free online Unix timestamp converter. Convert between Unix timestamps and human-readable dates. Supports seconds, milliseconds, and multiple timezones.

calculators

Slug Generator

Free online slug generator. Convert text to URL-friendly slugs with customizable options for SEO-optimized permalinks.

generators

SQL Formatter

Free online SQL formatter and beautifier. Format, indent, and clean up your SQL queries instantly with customizable options.

formatters

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QR Code Generator

Free online QR code generator. Create custom QR codes for URLs, text, email, phone, WiFi, and more with customizable colors and sizes.

generators

URL Encoder & Decoder

Free online URL encoder and decoder. Encode special characters for URLs, decode percent-encoded strings, and parse URL components. Supports multiple encoding modes.

encoders

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UUID Generator

Free online UUID v4 generator. Create single or bulk UUIDs instantly. Multiple formats: standard, uppercase, no dashes, braces. Secure and private.

generators

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Word Counter

Free online word counter tool. Count words, characters, sentences, paragraphs, and get reading time estimates instantly.

text tools

Why Use CMD Tools?

CMD Tools is a comprehensive collection of free online developer tools designed to make your workflow faster and more efficient. Whether you're formatting JSON, generating secure passwords, encoding data, or performing quick calculations, our tools are built with developers in mind.

Privacy-First Approach

All our tools run entirely in your browser. Your data never leaves your device — we don't send it to any server, store it, or track it. This makes our tools safe for handling sensitive data like API keys, passwords, and confidential configurations.

Optimized for Speed

Built with modern web technologies, our tools load instantly and perform operations in milliseconds. No waiting for server responses — everything happens locally at the speed of your device.

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Jump straight into using any tool without creating an account or signing up. Bookmark your favorites and access them anytime, completely free.