Free Developer & Web Utilities
Practical online tools for developers, web designers, bloggers and technical users. Format, validate, convert, test, encode, generate and optimize common web-development data and code directly in your browser.
Free Developer & Web Tools
Useful browser-based utilities for coding, web development, debugging, design and everyday technical tasks.
AISkillsUp Developer & Web Utilities brings together practical tools for developers, web designers, students, bloggers and anyone working with websites or digital content.
Format and validate JSON, clean HTML, CSS and JavaScript, encode and decode data, test regular expressions, inspect colors, generate CSS components and create useful technical values such as UUIDs, timestamps and random strings.
The tools in this collection are designed around common development tasks that can often be handled directly in the browser without requiring a server-side application.
Fast Utilities
Handle common developer tasks quickly with focused tools.
Web Focused
Work with common formats and technologies used on the web.
Practical Tools
Useful utilities for coding, testing, formatting and design.
Browser Friendly
Many everyday tasks can be handled directly in your browser.
Developer & Web Tools Collection
Choose a category to find the utility you need.
JSON Tools
Format, validate, beautify and minimize JSON data.
JSON Formatter
Format JSON data into a clean and readable structure.
Open Tool →JSON Validator
Check JSON syntax and identify invalid JSON data.
Open Tool →JSON Beautifier
Beautify compressed or difficult-to-read JSON content.
Open Tool →JSON Minifier
Remove unnecessary whitespace from JSON data.
Open Tool →JSON to CSV Converter
Convert compatible JSON data into CSV format.
Open Converter →CSV to JSON Converter
Convert structured CSV data into JSON.
Open Converter →JSON Escape / Unescape
Escape or unescape characters used inside JSON strings.
Open Tool →JSON Sorter
Organize JSON object keys into a selected order.
Open Tool →HTML & XML Tools
Format, clean, validate and work with markup content.
HTML Formatter
Format HTML into a cleaner and more readable structure.
Open Formatter →HTML Minifier
Minimize HTML by reducing unnecessary whitespace.
Open Minifier →HTML Validator
Check basic HTML structure and markup issues.
Open Validator →HTML Entity Encoder
Encode special characters for use in HTML.
Open Tool →HTML Entity Decoder
Decode HTML entities back into readable characters.
Open Tool →XML Formatter
Format XML documents into a readable structure.
Open Formatter →XML Validator
Check basic XML syntax and structure.
Open Validator →HTML to Text Converter
Extract readable text from HTML content.
Open Converter →CSS Tools
Format, minimize and generate useful CSS styles.
CSS Formatter
Format CSS code into a clean readable structure.
Open Formatter →CSS Minifier
Minimize CSS by removing unnecessary whitespace.
Open Minifier →CSS Box Shadow Generator
Create CSS box-shadow values visually.
Open Generator →CSS Gradient Generator
Generate customizable CSS gradients.
Open Generator →CSS Button Generator
Create customizable CSS button styles and code.
Open Generator →CSS Border Radius Generator
Generate CSS border-radius values for UI elements.
Open Generator →CSS Color Generator
Create and preview CSS color values.
Open Generator →CSS Text Shadow Generator
Generate customizable CSS text-shadow styles.
Open Generator →JavaScript Tools
Format and minimize JavaScript for everyday development work.
JavaScript Formatter
Format JavaScript into a cleaner readable structure.
Open Formatter →JavaScript Minifier
Minimize JavaScript code by reducing unnecessary whitespace.
Open Minifier →JavaScript Escape / Unescape
Escape and unescape supported JavaScript string content.
Open Tool →JavaScript String Converter
Transform text into JavaScript-compatible string formats.
Open Tool →Encoding & Decoding Tools
Encode and decode commonly used digital text formats.
Base64 Encoder
Encode text into Base64 representation.
Open Encoder →Base64 Decoder
Decode Base64 text into readable content.
Open Decoder →Base64 Encoder / Decoder
Encode and decode Base64 from one interface.
Open Tool →URL Encoder / Decoder
Encode and decode text used in URLs.
Open Tool →HTML Entity Encoder / Decoder
Convert special HTML characters to and from entities.
Open Tool →Unicode Encoder / Decoder
Work with Unicode text representations.
Open Tool →URL & Web Tools
Work with URLs, query parameters and common web addresses.
URL Encoder
Encode text for use inside web URLs.
Open Tool →URL Decoder
Decode encoded URL components.
Open Tool →URL Parser
Break a URL into its common components.
Open Tool →Query String Parser
Inspect parameters contained in a URL query string.
Open Tool →Query String Builder
Build URL query parameters from key-value pairs.
Open Tool →URL Slug Generator
Create clean URL-friendly slugs from titles and phrases.
Open Generator →Regular Expression Tools
Test patterns and work with regular expressions.
Regex Tester
Test regular expressions against sample text.
Open Tester →Regex Generator
Create regular-expression patterns for common tasks.
Open Generator →Regex Match Extractor
Extract matching portions of text using a pattern.
Open Tool →Regex Replace Tester
Test regular-expression replacement operations.
Open Tester →Web Security & Token Utilities
Useful tools for inspecting and generating common development values and token formats.
JWT Decoder
Decode the readable header and payload portions of a JWT.
Open Decoder →UUID Generator
Generate universally unique identifier values.
Open Generator →Random String Generator
Generate random strings with customizable options.
Open Generator →Password Generator
Generate random passwords with configurable character sets.
Open Generator →Hash Generator
Generate supported cryptographic hash values in the browser.
Open Generator →HMAC Generator
Generate supported HMAC values from supplied data.
Open Generator →Color & Design Tools
Pick, convert and work with common web color formats.
Color Picker
Select colors and inspect their digital values.
Open Picker →HEX Color Converter
Convert HEX colors into other supported color formats.
Open Converter →HEX ↔ RGB Converter
Convert colors between HEX and RGB values.
Open Converter →RGB ↔ HSL Converter
Convert colors between RGB and HSL representations.
Open Converter →Color Palette Generator
Generate color palettes for websites and design projects.
Open Generator →Color Contrast Checker
Check contrast between foreground and background colors.
Open Checker →Developer Generators
Generate useful values and components for development work.
UUID Generator
Generate UUID values for development projects.
Open Generator →Random String Generator
Create customizable random strings.
Open Generator →Password Generator
Generate configurable random passwords.
Open Generator →Timestamp Generator
Generate Unix timestamps and common date-time values.
Open Generator →Unix Timestamp Converter
Convert Unix timestamps into readable dates and times.
Open Converter →QR Code Generator
Create QR codes from text, URLs and other supported data.
Open Generator →Placeholder Image URL Generator
Create simple placeholder image URLs for development layouts.
Open Generator →HTML Boilerplate Generator
Generate a basic HTML document structure.
Open Generator →CSS Reset Generator
Generate a simple customizable CSS reset.
Open Generator →Web Development Utilities
Additional practical utilities for websites and web projects.
Viewport Size Checker
Check the current browser viewport dimensions.
Open Tool →Screen Resolution Checker
Inspect screen and display resolution information.
Open Tool →Device Pixel Ratio Checker
Check the browser's device pixel ratio.
Open Tool →Browser User-Agent Checker
View the browser's available user-agent string.
Open Tool →HTML Meta Tag Generator
Generate common HTML meta tags for web pages.
Open Generator →Open Graph Meta Tag Generator
Generate basic Open Graph metadata markup.
Open Generator →<div class="developer-tools"> <h1>Build. Test. Format. Convert.</h1> <p>Practical utilities for everyday web development.</p> </div>
Useful Tools for the Modern Web
Developers frequently move between code, structured data, URLs, colors, tokens and web markup. Keeping simple utilities together makes these small but repetitive tasks easier to handle while working on websites and digital projects.
- 🧩 Format Code
- ✅ Validate Data
- 🔄 Convert Formats
- 🔐 Encode Data
- 🔎 Test Patterns
- 🎨 Generate CSS
- ⚙️ Generate Values
- 🌐 Build Web Data
Explore Related Free Tools & Utilities
Explore other AISkillsUp categories that complement developer and web-development workflows.
Developer & Web Utilities FAQ
Common questions about developer and web-development tools.
What are Developer & Web Utilities?
Developer and web utilities are focused tools that help with common programming, web-development, data-formatting, encoding, testing and website-building tasks.
What can a JSON formatter do?
A JSON formatter organizes JSON data with indentation and structure so that it is easier to read and inspect.
What is a JSON validator?
A JSON validator checks whether supplied JSON follows the expected JSON syntax and can help identify malformed data.
What is code minification?
Code minification removes unnecessary characters such as whitespace and line breaks while preserving the intended code structure, helping reduce file size.
What is Base64 encoding?
Base64 is a method of representing binary or text data using a set of ASCII characters. It is commonly encountered in web development and data transfer.
What is a regex tester?
A regular expression tester lets users test a regex pattern against sample text and inspect the matches produced by that pattern.
What is a JWT decoder?
A JWT decoder can display the readable header and payload portions of a JSON Web Token. Decoding a token does not mean that its signature has been verified.
What are CSS generators used for?
CSS generators help users visually create CSS values and styles such as gradients, shadows, buttons and border radius settings.
Can web developers use these tools for daily work?
Yes. Formatting data, converting values, testing patterns, generating CSS, working with URLs and creating technical values are common tasks during web development.
Are Developer & Web Utilities useful for bloggers?
Yes. Bloggers and website owners can use developer tools for HTML, URLs, metadata, colors, formatting and other website-related tasks.
Find the Developer Tool You Need
Format code, validate data, convert web formats, test patterns, generate CSS and work with useful developer values.
Browse Developer & Web Tools →
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