Developer tools,
all in one place.
Format, convert, encode, and transform data instantly. Every tool you reach for as a developer, right here, free and private.
JSON & Data
Format, validate, and convert JSON, CSV, and YAML data
JSON Formatter
Beautify and format JSON with customizable indentation
JSON Validator
Validate JSON syntax and get detailed error messages
JSON to CSV
Convert JSON arrays and objects into CSV format
JSON to XML
Transform JSON data into well-formed XML
JSON to YAML
Convert JSON data to YAML format for config files
CSV to JSON
Convert CSV files and text into JSON arrays
CSV Formatter
Format and preview CSV data in a clean table view
YAML to JSON
Convert YAML configuration files to JSON
Data Pretty Printer
Auto-detect and pretty print JSON, YAML, or XML data
Data Minifier
Minify and compress JSON to reduce file size
Encoding / Decoding
Encode and decode Base64, URL, HTML, JWT, and more
Base64 Encode
Encode text or files to Base64 format
Base64 Decode
Decode Base64 strings back to readable text
URL Encode
Encode URLs and query strings for safe transmission
URL Decode
Decode percent-encoded URLs back to readable form
HTML Encode
Convert special characters to HTML entities
HTML Decode
Convert HTML entities back to readable characters
JWT Decoder
Decode and inspect JWT token header, payload, and signature
Unicode Converter
Convert text to Unicode code points and back
ASCII Converter
Convert text to ASCII codes and back
Binary Converter
Convert text, decimal, hex, and octal to binary and back
Time & Date
Convert timestamps, calculate date differences, and manage timezones
Timestamp Converter
Convert Unix timestamps to human-readable dates and back
Date Difference Calculator
Calculate the exact difference between two dates
Time Zone Converter
Convert times across different time zones worldwide
Cron Expression Generator
Build cron expressions visually with a friendly UI
Cron Expression Reader
Decode and explain cron expressions in plain English
ISO Date Formatter
Format dates to ISO 8601 standard and other date formats
Duration Calculator
Add or subtract durations and calculate time spans
Countdown Generator
Create a countdown to any future date or event
Color & UI
Convert colors, generate palettes, gradients, and shadows
HEX to RGB
Convert hexadecimal color codes to RGB and HSL values
RGB to HEX
Convert RGB color values to hexadecimal color codes
Color Picker
Pick colors visually and get HEX, RGB, and HSL values
Gradient Generator
Create CSS gradients with a visual builder
Contrast Checker
Check WCAG color contrast ratios for accessibility compliance
Palette Generator
Generate harmonious color palettes from a base color
Shadow Generator
Create CSS box-shadow and text-shadow with a visual editor
Text & Code
Diff, format, convert, and clean text and code
Text Diff Checker
Compare two pieces of text and highlight the differences
Code Diff Tool
Side-by-side code comparison with syntax highlighting
Word Counter
Count words, characters, sentences, and reading time
Remove Duplicate Lines
Remove duplicate lines from text while preserving order
Case Converter
Convert text between camelCase, snake_case, UPPER CASE, and more
Text Cleaner
Remove extra spaces, special characters, and clean up text
Regex Tester
Test regular expressions with live matching and highlighting
Regex Generator
Generate common regex patterns for emails, URLs, phones, and more
Code Formatter
Format and beautify HTML, CSS, and JavaScript code
Code Minifier
Minify and compress HTML, CSS, and JavaScript
Security
Generate passwords, check strength, and create hashes
Password Generator
Generate strong, random passwords with custom rules
Password Strength Checker
Check how strong your password is and get improvement tips
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
Hash Checker
Compare and verify file or text hashes
Random Token Generator
Generate cryptographically secure random tokens and secrets
Developer Utilities
UUIDs, QR codes, API testing, and network tools
UUID Generator
Generate UUID v1, v4, and v5 identifiers
GUID Generator
Generate Windows-style GUIDs for .NET and COM applications
API Request Tester
Test HTTP API endpoints with custom headers and request body
HTTP Header Viewer
Inspect and decode HTTP request and response headers
IP Lookup Tool
Look up geolocation, ISP, and details for any IP address
User Agent Parser
Parse and analyze browser user-agent strings
DNS Lookup
Query DNS records including A, AAAA, MX, CNAME, and TXT
Port Checker
Check if a port is open or closed on any host
QR Code Generator
Generate QR codes for URLs, text, WiFi, and more
QR Code Reader
Scan and decode QR codes from images or your camera
Missing a tool you need?
DevHexLab is always growing. Reach out and suggest a tool you want to see added.
Suggest a tool