Developer Tools
37 free online developer utilities — number converters, hash generators, code formatters, JWT tools, and more. All run entirely in your browser.
Binary To Decimal
Convert between binary, decimal, hex and octal number systems
Color Converter
Convert colors between HEX, RGB, and HSL formats
Convert Binary
Convert binary numbers to text and text to binary
Convert Timestamp
Convert Unix epoch timestamp to standard date format and back
Count Words
Count words, characters, sentences and paragraphs in text
Convert Datetime
Convert datetime between different formats and timezones
Encode Image to Base64
Encode any image file to Base64 string for embedding in HTML or CSS
Encode / Decode Base64
Encode or decode text and data using Base64 encoding
Encode / Decode URL
URL encode or decode strings for use in web addresses
Format XML
Format and beautify XML documents with proper indentation
Generate JWT Token
Generate JWT tokens from a JSON payload and secret key
Generate Checksum
Generate MD5, SHA-1 or SHA-256 checksum of any text
Generate Cryptographic Hash
Generate a variety of cryptographic hashes from text or files
Generate Sitemap
Generate an XML sitemap for any website instantly
HEX To RGB
Convert hexadecimal color codes to RGB and HSL values
JSON Formatter
Format and beautify JSON data with proper indentation
Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text for designs and mockups
Parse Cron Expression
Parse and explain cron expressions in plain English
Password Generator
Generate secure random passwords with custom rules
Regex Tester
Test and validate regular expressions against sample text
RGB To Hex
Convert RGB color values to hexadecimal color codes
Text Case Converter
Convert text between camelCase, snake_case, PascalCase and more
UUID Generator
Generate unique UUIDs (v1 and v4) for use in applications
Verify & Decode JWT
Decode and verify JWT tokens to inspect their payload and header
Validate XML with XSD
Validate an XML file against an XSD schema definition
HTML Beautifier
Format and beautify HTML code with proper indentation and structure
HTML Compressor
Minify and compress HTML by removing whitespace and comments
CSS Beautifier
Format and beautify CSS stylesheets with proper indentation
CSS Compressor
Minify and compress CSS stylesheets to reduce file size
JavaScript Beautifier
Format and beautify JavaScript code with proper indentation
JavaScript Compressor
Minify and compress JavaScript code to reduce file size
Glassmorphism Generator
Create frosted-glass CSS effects with live preview — adjust blur, transparency and border
Neumorphism Generator
Generate soft UI / neumorphism CSS box-shadow effects with live preview
CSS Animation Generator
Generate CSS keyframe animations with live preview — 16 presets, full timing control
SVG Blob Generator
Generate random organic SVG blob shapes for backgrounds and illustrations
CSS Grid Generator
Visually build CSS Grid layouts — click cells to define areas, copy the CSS instantly
Flexbox Playground
Interactive CSS Flexbox builder — control all flex properties with live preview
What are browser-based developer tools?
Browser-based developer tools are standalone web utilities that run entirely client-side — no server, no backend, no account required. Every operation (encoding, decoding, formatting, generating, validating) happens inside your browser tab using JavaScript and the native Web APIs. This means your data never leaves your device — an essential property when working with sensitive inputs like API keys, JWT tokens, database schemas, or configuration files.
These tools are built for developers, DevOps engineers, and technical teams who need quick, reliable utilities without standing up a local environment or trusting a cloud service with sensitive data. Each tool is a single focused function — paste input, get output — with no installation, no Docker container, and no waiting.
Tool categories
Data Formatters & Validators
JSON Formatter (beautify, minify, validate), XML Formatter & Validator, CSS Beautifier/Compressor, JS Beautifier/Compressor, HTML Beautifier/Compressor. Paste messy output from APIs or build pipelines and get clean, readable, validated code instantly.
Encoding & Decoding
Base64 Encoder/Decoder, URL Encoder/Decoder, Image to Base64, Binary to Decimal, Decimal to Binary, Hex converter. Essential for working with HTTP headers, data URIs, authentication tokens, and binary protocols.
Security & Cryptography
JWT Generator & Verifier, Password Generator (crypto.getRandomValues), SHA-256/SHA-512 Hash Generator, HMAC tools. All use the browser's native Web Crypto API — the same engine powering secure websites — with zero data transmission.
Generators & Converters
UUID v4 Generator, Cron Expression Parser, Unix Timestamp Converter, Color Converter (HEX ↔ RGB ↔ HSL), Lorem Ipsum Generator, Regex Tester with live match highlighting, Word Counter, Text Case Converter.
Why use these instead of desktop tools?
Desktop tools like Postman, Notepad++, and VS Code extensions are excellent for deep workflow integration. But for a quick one-off operation — checking a JWT expiry, validating a JSON blob, generating a UUID for a ticket — opening an IDE or a desktop app adds unnecessary friction. Browser tools open instantly in any tab, work on any OS, and require no install or update.
Security is another key reason. When you paste an API token or a production database schema into an online tool, you are trusting that service with sensitive credentials. Our tools are 100% client-side with zero network activity for the actual processing. You can verify this by opening DevTools → Network tab and watching that no requests are made when you use any tool on this page.
Frequently Asked Questions
Is my data sent to a server when I use these tools?
No. All processing happens in your browser using client-side JavaScript. When you paste a JWT token, API key, JSON blob, or regex pattern, that data never leaves your browser tab. There is no backend server receiving your input — you can verify this in your browser's Network DevTools.
Can I use these tools offline?
Once the page is loaded, most tools (formatters, encoders, generators) work entirely offline. Tools that use the JWT validation API or external schema validators require an internet connection for that specific step.
Do I need an account to use developer tools?
A free account is needed to unlock higher daily usage limits. However, basic usage is available to guests. Sign up for free to remove most limits.
What is the best tool for validating JSON?
The JSON Formatter includes a strict validator using the browser's native JSON.parse(). It flags the exact character position of any syntax error — trailing commas, single-quoted strings, undefined values, and more.
Which tools support batch input?
The Word Counter, Text Case Converter, and Lorem Ipsum Generator all accept multi-paragraph input. The Base64 and URL encoders process entire text blocks at once.