Online Developer Tools
86 free tools for developers. Hash generators, converters, encoders, network calculators, and more. No signup required.
Showing all 86 tools
ASCII Art Generator
Create ASCII art text
Base Converter
Convert numbers between bases (binary, hex, decimal)
Base64 File Converter
Convert files to and from Base64
Base64 String Converter
Encode and decode Base64 strings
Basic Auth Generator
Generate HTTP Basic Authentication headers
Bcrypt
Hash and verify passwords with bcrypt
Benchmark Builder
Measure code execution time
BIP39 Generator
Generate BIP39 mnemonic seed phrases
Camera Recorder
Record video from webcam
Case Converter
Convert text case (camelCase, snake_case, etc.)
Chmod Calculator
Calculate Unix file permissions
Chronometer
Stopwatch and timer
Color Converter
Convert colors between HEX, RGB, HSL
Crontab Generator
Build cron schedule expressions
Date-Time Converter
Convert dates between formats and timezones
Device Information
View browser and device details
Docker Run to Compose
Convert docker run to docker-compose.yml
Email Normalizer
Normalize and validate email addresses
Emoji Picker
Browse and copy emojis
Encryption
Encrypt and decrypt text with AES, DES
ETA Calculator
Calculate estimated time of arrival
Git Cheatsheet
Common Git commands reference
Hash Text
Hash text with MD5, SHA1, SHA256, SHA512
HMAC Generator
Generate HMAC authentication codes
HTML Entities
Encode and decode HTML entities
HTML WYSIWYG Editor
Visual HTML editor with live preview
HTTP Status Codes
HTTP status code reference guide
IBAN Validator
Validate and parse IBAN numbers
Invisible Text Detector
Detect and remove invisible Unicode characters from text
IPv4 Address Converter
Convert IPv4 between formats
IPv4 Range Expander
Expand CIDR ranges to IP lists
IPv4 Subnet Calculator
Calculate subnet masks and IP ranges
IPv6 ULA Generator
Generate IPv6 Unique Local Addresses
JSON Diff
Compare two JSON documents
JSON Minifier
Minify JSON by removing whitespace
JSON to CSV
Convert JSON arrays to CSV format
JSON to TOML
Convert JSON to TOML format
JSON to XML
Convert JSON to XML format
JSON to YAML
Convert JSON to YAML format
JSON Viewer
View and format JSON data with syntax highlighting
JWT Parser
Decode and inspect JWT tokens
Keycode Info
Find JavaScript keyboard keycodes
List Converter
Convert between list formats (comma, newline, etc.)
Lorem Ipsum Generator
Generate placeholder text
MAC Address Generator
Generate random MAC addresses
MAC Address Lookup
Find vendor by MAC address
Math Evaluator
Evaluate mathematical expressions
Meta Tag Generator
Generate HTML meta tags for SEO
MIME Types
Look up MIME types by file extension
NATO Alphabet
Convert text to NATO phonetic alphabet
Numeronym Generator
Create numeronyms like i18n, a11y
OTP Generator
Generate TOTP/HOTP codes for 2FA
Password Strength
Analyze password strength and security
PDF Signature Checker
Verify digital signatures in PDF files
Percentage Calculator
Calculate percentages and ratios
Phone Number Parser
Parse and format international phone numbers
QR Code Generator
Generate QR codes for URLs and text
Random Port Generator
Generate random available port numbers
Regex Cheatsheet
Regular expression syntax reference
Regex Tester
Test regular expressions with sample text
Roman Numeral Converter
Convert between Roman numerals and Arabic numbers
RSA Key Pair Generator
Generate RSA public/private key pairs
Safelink Decoder
Decode Microsoft SafeLinks URLs
Slugify String
Convert text to URL-friendly slugs
SQL Formatter
Format and beautify SQL queries
String Obfuscator
Obfuscate and hide text
SVG Placeholder
Generate SVG placeholder images
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin
Text Diff
Compare two text documents
Text Statistics
Analyze text with word and character counts
Text to Binary
Convert text to binary representation
Text to Unicode
Show Unicode code points for text
Token Generator
Generate random tokens and secure strings
TOML to JSON
Convert TOML to JSON format
TOML to YAML
Convert TOML to YAML format
ULID Generator
Generate sortable unique identifiers
URL Encoder
Encode and decode URLs
URL Parser
Parse and analyze URL components
User Agent Parser
Parse and analyze user agent strings
UUID Generator
Generate UUIDs v1, v4, and v5
WiFi QR Code Generator
Generate QR codes for WiFi credentials
XML Formatter
Format and beautify XML documents
XML to JSON
Convert XML to JSON format
YAML Formatter
Format and validate YAML
YAML to JSON
Convert YAML to JSON format
YAML to TOML
Convert YAML to TOML format