50+ Free Online Developer Utilities
Secure, client-side online tools for formatting, validation, encoders, generators, and converters. No data ever leaves your device.
All Tools (85)
YAML Formatter
Format, align, and pretty print raw YAML configuration strings client-side.
YAML to CSV Converter
Convert YAML structures or lists into flat CSV spreadsheet layout tables client-side.
XML Formatter
Format, align, and pretty print complex XML documents and documents structures.
HTML Formatter
Format HTML source code templates for better code readability and structure alignment.
HTML Entity Encoder & Decoder
Encode special characters into HTML entities to safely display code snippets, and decode them back.
HTML to Markdown Converter
Convert raw HTML tag markup to clean, simplified Markdown content.
XML to JSON Converter
Convert structured XML tag configurations into standard JSON objects.
Markdown Live Editor & Previewer
Write markdown syntax on the left and see formatted HTML rendering dynamically on the right.
Live Web Compiler
Write, edit, and compile HTML, CSS, and JS code blocks in real-time client-side.
JSON Formatter
Clean, format, and beautify your JSON data with custom indentation and formatting rules.
JSON Validator
Check if your JSON data is syntax-valid and see descriptive error details if parse fails.
JWT Decoder
Decode and extract information from JSON Web Tokens (JWT) client-side without compromising security.
UUID Generator
Generate secure, random UUID v4 strings individually or in batches for database primary keys.
Secure Password Generator
Create cryptographically strong, random passwords with customizable parameters (numbers, symbols, length).
QR Code Generator
Generate high-quality QR codes for URLs, text messages, or contact details instantly.
URL Encoder & Decoder
Safely encode or decode special characters in URLs for query parameters and API payloads.
Base64 Encoder & Decoder
Convert plaintext data or strings to Base64 format and decode them back to standard text.
Base64 Decoder
Decode Base64 encoded data back to plaintext or binary format.
SQL Formatter
Beautify and format your SQL queries with proper alignment, indentation, and capitalization keywords.
Epoch Timestamp Converter
Convert Unix epoch timestamps to human-readable date-time formats and vice-versa.
Color Code Converter
Convert color codes between Hex, RGB, HSL, and clean CSS declarations with real-time visual previews.
Regex Tester
Test, evaluate, and match regular expressions against test text inputs in real-time.
Hash Generator
Generate secure MD5, SHA-1, and SHA-256 cryptographic checksums for text inputs.
String Case Converter
Instantly convert strings between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.
Lorem Ipsum Generator
Generate random placeholder text paragraphs, sentences, or lists for UI design layout mockups.
Binary/Hex/Decimal Converter
Convert number values between Binary, Octal, Decimal, and Hexadecimal representations.
CSV to JSON Converter
Convert spreadsheet data (CSV format) to parsed, fully formatted JSON structures.
CSV to XML Converter
Convert spreadsheet data (CSV format) to structured XML format.
User Agent Parser
Analyze and extract browser type, OS version, engine, and device vendor from a user agent string.
Morse Code Generator
Translate text to Morse code signals and play back or copy the output.
Date Calculator
Calculate the precise duration, days, hours, and weeks between two selected calendar dates.
CSS Box Shadow Generator
Design elegant CSS box shadows visually with real-time browser preview and generated CSS output code.
CSS Gradient Generator
Visually create linear and radial CSS gradients with unlimited color stops.
CSS Flexbox Visualizer & Generator
Visualize CSS Flexbox layouts dynamically and generate copy-pasteable CSS declarations.
URL Parser & Query String Splitter
Break down an absolute URL into its components: host, port, protocol, path, and parsed query variables.
IP Address & Client Info Lookup
Detect your current public IP address, browser dimensions, device details, and screen depth.
Multi Unit Converter
Convert quantities between Length, Weight, Temperature, Area, and Volume systems.
Percentage Calculator
Calculate fractional proportions, percentage increases, percentage decreases, and ratio percentage returns.
Word & Character Counter
Count words, characters, sentences, paragraphs, and reading times dynamically.
Text to Speech Reader
Synthesize written text into spoken voice prompts using standard local Web Speech APIs.
Caesar Cipher Encryptor/Decryptor
Encode and decode messages using the classic Caesar shift cipher algorithm with custom key shifts.
ROT13 Encoder & Decoder
Obfuscate and decode text inputs using the standard ROT13 rotation cipher (shift of 13 places).
Cron Expression Generator & Reader
Generate cron schedule syntax and parse existing cron schedules into readable descriptions.
Random Number Generator
Generate single or bulk random numbers within a custom range, with or without duplicates.
List Sorter & Shuffler
Sort text lists alphabetically, reverse list entries, remove empty items, or shuffle lists randomly.
Duplicate Line Remover
Remove repeated lines and items from text lists while preserving ordering.
ASCII & Character Code Lookup
Find character keys, ASCII codes, binary codes, Hex encodings, and HTML entity representations.
URL Slug Generator
Clean strings to generate URL-safe SEO slugs, converting characters to lowercase and removing symbols.
Text Diff Checker
Compare two text passages side-by-side to highlight character, word, or line differences.
Binary to Text Converter
Translate binary digits (0s and 1s) to ASCII english characters and vice-versa.
MIME Types Quick Reference
Lookup common file extensions and their corresponding MIME Content-Types.
HTTP Status Codes Reference
Review common HTTP response status codes, categories (1xx-5xx), and standard descriptions.
Base32 Encoder & Decoder
Encode plain text strings using standard RFC 4648 Base32 alphabet and decode them.
Image to Base64 Converter
Load images from your device and encode them directly into data URL Base64 strings for CSS/HTML.
Phone Number Standardizer
Format phone numbers into clean international formats, extracting country and area dialing codes.
JSON to YAML Converter
Convert JSON data to clean, standard YAML format client-side.
YAML to JSON Converter
Convert YAML configurations to standard formatted JSON objects.
JSON Minifier
Compress and minify your JSON data by stripping unnecessary whitespace and line breaks.
YAML Validator & Formatter
Validate YAML syntax and pretty-print/beautify your YAML configurations.
JSON to XML Converter
Convert JSON structures to standard, well-formed XML tag code.
JSON to TypeScript
Generate clean TypeScript interfaces recursively from JSON structures client-side.
JSON to CSV Converter
Convert JSON array and object structures to flat CSV spreadsheet rows client-side.
JSON Diff Checker
Compare two JSON objects side-by-side and highlight structural differences.
JSON to Java Converter
Generate standard Java POJO class models recursively from JSON structures.
CSS Minifier & Formatter
Minify stylesheets or beautify stylesheet formats with clean indent spacing.
JS Formatter & Beautifier
Pretty-print, format, and align raw or compressed JS code blocks.
XML Validator & Linter
Validate XML syntax and trace lines containing markup structural errors.
JSON to C# Converter
Convert JSON objects recursively into C# property class definitions.
JSON to Go Struct
Convert JSON structures into nested Go (Golang) struct models.
Markdown to HTML
Convert standard Markdown syntax strings into rendered HTML tags client-side.
JavaScript Minifier
Compress raw JS code blocks, stripping comments and spaces.
SQL Minifier
Compress SQL queries by removing blank lines and double spaces.
HTML Minifier
Compress raw HTML tags and templates client-side securely.
JSONPath Tester
Query and extract specific nodes or elements from JSON payloads using standard JSONPath queries.
XML to YAML
Convert standard XML structures into clean nested YAML format client-side.
YAML to XML
Convert YAML configurations to standard formatted XML tag structures.
JS Obfuscator
Obfuscate variables, constants, and function names in JS scripts.
JSON to Excel
Convert lists of JSON objects into Excel-compatible spreadsheet logs.
Python Online Compiler
Write, run, and test Python code directly in your browser client-side using WebAssembly.
Python Formatter & Beautifier
Format and beautify raw Python code blocks with proper PEP 8 indents, spacing, and styling.
Python Code Minifier
Compress Python scripts by removing docstrings, comments, empty lines, and excessive whitespaces.
Python Syntax Validator
Validate Python code syntax client-side. Check for compile errors, trace wrong indents, and identify formatting bugs.
JSON to Python Converter
Convert JSON array and object structures to Python dictionaries or typed dataclass models client-side.
JSON to C++ Converter
Generate C++ struct definitions recursively from JSON structures client-side.
Python to JSON Converter
Convert Python dictionary literal structures to standard, well-formed JSON client-side.
📚 Developer Articles & SEO Guides
Read our deep-dives on data formats, security configurations, and web monetization.
Demystifying JSON Formatting and Validation: A Developer's Guide
Learn the difference between clean, formatted JSON data and raw JSON strings. Find out how validator tools parser logs work to fix syntax issues.
Understanding JWT Structures: How to Securely Decode Tokens
Deep-dive into the JSON Web Token (JWT) standard. Understand header, payload, and signature sections, and how to inspect claims safely.
A Comprehensive Guide to UUID v4 Generation and Best Practices
What is a Universally Unique Identifier? Understand UUID structure, random entropy, and why Version 4 is ideal for database keys.
How to Generate Secure Cryptographic Passwords
Best practices for password security. Learn why entropy matters and how to programmatically create secure passwords.