🛠️ Free Online Developer Tools

A growing collection of free browser-based developer tools for JSON, CSV, YAML, Markdown, encoding, hashing, regular expressions, JWT, UUIDs, timestamps, HTML, CSS, JavaScript, SQL, XML, colors, numbers, diff checking, cron expressions, and more.

⚡ Instant Results 💻 Browser Based 🔒 Privacy Friendly 💯 Free

📋 JSON 🔐 Encoding 🛡️ Security 🌐 HTML 🎨 CSS ⚡ JavaScript 🗄️ SQL 📄 XML 🌈 Color ⚙️ Utilities 🔄 Data Conversion 🧾 YAML 📝 Markdown 🧰 Dev Utilities ❓ FAQ

📋 JSON Tools

📋 JSON Formatter

Format and beautify JSON data to make structured information easier to read, inspect, and debug.

🗜️ JSON Minifier

Minify JSON by removing unnecessary whitespace and formatting to create compact JSON.

✅ JSON Validator

Check JSON syntax and quickly identify invalid or malformed JSON data.

🔐 Encoding & Decoding Tools

🔤 Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 data directly in your browser.

🔗 URL Encoder & Decoder

Encode and decode URLs, query parameters, and special characters quickly.

🛡️ Security & Developer Tools

🆔 UUID Generator

Generate random UUIDs for applications, APIs, databases, and software development.

🔐 Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text.

🔎 Regex Tester

Test regular expressions against text and inspect matches instantly.

🔑 JWT Decoder

Decode JWT headers and payloads and inspect token claims in seconds.

🕐 Timestamp Converter

Convert Unix timestamps to readable dates and convert dates back to timestamps.

🌐 HTML Tools

🌐 HTML Formatter

Beautify and format HTML code into a clean, readable structure.

🗜️ HTML Minifier

Compress HTML by removing unnecessary whitespace and characters.

🔤 HTML Encoder & Decoder

Encode and decode HTML entities for web development and debugging.

🎨 CSS Tools

🎨 CSS Formatter

Format and beautify CSS code for easier reading and maintenance.

🗜️ CSS Minifier

Minify CSS code to reduce unnecessary whitespace and file size.

✨ CSS Beautifier

Beautify compressed or messy CSS into a cleaner readable format.

⚡ JavaScript Tools

⚡ JavaScript Formatter

Format JavaScript code into a clean and readable structure.

🗜️ JavaScript Minifier

Minify JavaScript code to reduce whitespace and optimize file size.

✨ JavaScript Beautifier

Beautify compressed or poorly formatted JavaScript code online.

🗄️ SQL Tools

🗄️ SQL Formatter

Format SQL queries into a cleaner and more readable structure.

🗜️ SQL Minifier

Remove unnecessary whitespace from SQL queries to create compact SQL.

✅ SQL Validator

Check SQL syntax and identify common query formatting and syntax problems.

📄 XML Tools

📄 XML Formatter

Format and beautify XML documents into a readable structure.

✅ XML Validator

Validate XML structure and detect malformed XML documents.

🗜️ XML Minifier

Minify XML by removing unnecessary whitespace and formatting.

🌈 Color Tools

🌈 Color Converter

Convert colors between common formats including HEX, RGB, HSL, and other color values.

🎨 HEX to RGB Converter

Convert HEX color codes into RGB values quickly and accurately.

🎨 RGB to HEX Converter

Convert RGB color values into HEX color codes for websites and applications.

🌈 HSL Converter

Convert and work with HSL, RGB, and HEX color values online.

⚙️ Number & Developer Utilities

🔢 Binary Converter

Convert binary numbers to decimal, hexadecimal, and other number formats.

🔢 Decimal Converter

Convert decimal numbers into binary, hexadecimal, and other number bases.

🔢 Hex Converter

Convert hexadecimal values to decimal, binary, and other number formats.

🔢 Number Base Converter

Convert numbers between binary, octal, decimal, hexadecimal, and other bases.

🎲 Random String Generator

Generate random strings for testing, development, identifiers, and sample data.

🔗 Slug Generator

Create clean URL-friendly slugs from titles and text.

🔄 JSON & CSV Conversion Tools

📊 JSON to CSV

Convert JSON arrays and structured data into CSV format for spreadsheets, exports, and data processing.

📋 CSV to JSON

Convert CSV data into structured JSON for APIs, JavaScript applications, databases, and development workflows.

🧾 YAML Tools

🧾 YAML Formatter & Validator

Format YAML into a readable structure and check YAML input for syntax errors.

🔄 JSON to YAML

Convert valid JSON data into clean YAML for configuration files, development, and DevOps workflows.

🔄 YAML to JSON

Convert YAML documents into structured JSON for applications, APIs, configuration, and debugging.

📝 Markdown Tools

👁️ Markdown Previewer

Write or paste Markdown and preview the rendered result directly in your browser.

📝 Markdown to HTML

Convert Markdown syntax into HTML markup for websites, documentation, articles, and other web content.

🌐 HTML to Markdown

Convert HTML markup into cleaner Markdown for documentation, notes, content migration, and editing.

🧰 Additional Developer Utilities

🔍 Diff Checker

Compare two blocks of text or code and quickly identify additions, removals, and differences.

⏱️ Cron Expression Generator

Build cron expressions for common recurring schedules and inspect the generated cron syntax.

❓ Frequently Asked Questions

What are Developer Tools?

Developer Tools are online utilities that help developers format, validate, convert, encode, decode, test, and transform common programming and web development data.

Are these Developer Tools free?

Yes. BreymanTech Developer Tools are free to use online without requiring a subscription.

Can I use these tools on mobile devices?

Yes. The tools are designed to work in modern desktop and mobile web browsers.

Can I format and validate JSON online?

Yes. JSON Formatter can beautify JSON while JSON Validator can check whether JSON syntax is valid.

Can I encode and decode Base64 and URLs?

Yes. The Base64 Encoder & Decoder and URL Encoder & Decoder tools support both encoding and decoding directly in your browser.

What hash algorithms are available?

The Hash Generator supports common algorithms such as MD5, SHA-1, SHA-256, SHA-384, and SHA-512.

Can I decode a JWT token?

Yes. JWT Decoder lets you inspect the header and payload of a JSON Web Token. Decoding a JWT does not verify its cryptographic signature.

Can I format HTML, CSS, and JavaScript?

Yes. BreymanTech provides separate formatting, minification, and beautification tools for HTML, CSS, and JavaScript.

Can I format and validate XML?

Yes. XML Formatter, XML Validator, and XML Minifier are available for working with XML documents.

Can I format SQL queries online?

Yes. SQL Formatter helps organize SQL queries into a cleaner and more readable structure.

Can I convert HEX, RGB, and HSL colors?

Yes. The Color Tools section includes color conversion tools for HEX, RGB, and HSL values.

Can I convert numbers between different bases?

Yes. Number Base Converter and the Binary, Decimal, and Hex converters can convert values between common number systems.

Can I convert JSON and CSV online?

Yes. JSON to CSV converts structured JSON data into CSV, while CSV to JSON converts comma-separated data into JSON for development and data workflows.

Can I format, validate, and convert YAML?

Yes. You can format and validate YAML, convert JSON to YAML, and convert YAML back to JSON using the YAML tools.

Can I preview Markdown or convert Markdown and HTML?

Yes. Markdown Previewer renders Markdown in the browser, while Markdown to HTML and HTML to Markdown provide conversion in both directions.

What does the Diff Checker do?

Diff Checker compares two blocks of text or code so you can identify content that was added, removed, or changed.

Can I generate cron expressions?

Yes. Cron Expression Generator helps create cron syntax for common recurring schedules used by servers, scripts, and scheduled tasks.

Do I need to install software?

No. These are browser-based online tools, so you can use them directly without installing additional software.

⭐ Popular Developer Tools