Noobkit
Professional online developer tools and utilities for coding, testing, debugging, and system administration. Fast, secure, and completely free for developers worldwide.
Find Your Tool
Search through 38 professional tools instantly
Popular Tools
Start with our most popular tools used by thousands daily
JWT Decoder
Decode and verify JSON Web Tokens
UUID Generator
Generate UUIDs (v4 and v7) with customizable options
Bcrypt Hasher
Generate secure bcrypt hashes with customizable rounds
Bcrypt Hash Compare
Compare plain text with bcrypt hashes to verify passwords
SHA-256 Hasher
Generate SHA-256 hashes from text or files with verification
JSON Validator
Validate JSON syntax and format with detailed error messages
IP Subnet Calculator
Calculate IP subnet ranges, network addresses, and CIDR blocks
Date Calculator
Calculate days between dates or add/subtract days from any date
Browser Size Calculator
Real-time browser viewport size detector with visual ruler interface
PDF to PNG Converter
Convert PDF pages to high-quality PNG images with page selection
5-Color Palette Generator
Generate harmonious random color palettes with lock functionality
Image Base64 Converter
Convert images to Base64 data URLs and decode Base64 back to images
Time to Unix Converter
Convert dates and times to Unix timestamps or convert Unix timestamps back to human-readable dates
PDF Splitter & Reorder
Split PDF files, reorder pages by drag and drop, remove specific pages, and download the reorganized PDF
Timezone Converter
Convert time between different timezones with comprehensive timezone list
XML Formatter & Validator
Professional XML linter, beautifier, and minifier with syntax validation
Password Generator
Generate secure passwords with customizable criteria. Supports character types, length control, symbol categories, and exclusion options. Cryptographically secure random generation.
Password Strength Checker
Analyze password strength with detailed scoring system. Check against common vulnerabilities, length requirements, character diversity, and security best practices.
Word Count Tool
Analyze text with intelligent word, character, and sentence counting. Auto-adapts for English, Chinese, and Japanese text with cultural relevance.
YAML Linter
Validate YAML syntax, format, and structure with detailed error reporting
TOML Linter
Validate TOML syntax, format, and structure with detailed error reporting
QR Code Generator
Generate custom QR codes with style options
AES File Encryption
Encrypt and decrypt files using AES-256-GCM encryption with password protection. Secure client-side processing with PBKDF2 key derivation and authenticated encryption.
PDF Merger
Merge multiple PDF files into a single document with page ordering support. Drag-and-drop file upload with preview functionality
Browse by Category
Discover tools organized by their purpose and functionality
Security & Authentication
9 toolsJWT tokens, password hashing, and security tools
Data Conversion
8 toolsConvert between different formats and encodings
Color & Design
3 toolsColor palettes, design tools, and visual utilities
Development Tools
8 toolsValidation, testing, and developer utilities
Document & Media
6 toolsImage processing and document conversion
Calculators & Math
3 toolsMathematical calculations and computational tools
Generators & QR
1 toolsGenerate QR codes, barcodes, and other visual elements
Security & Authentication
9 tools available
JWT Decoder
Decode and verify JSON Web Tokens
Bcrypt Hasher
Generate secure bcrypt hashes with customizable rounds
Bcrypt Hash Compare
Compare plain text with bcrypt hashes to verify passwords
MD5 Hasher
Generate MD5 hashes from text or files with verification
SHA-256 Hasher
Generate SHA-256 hashes from text or files with verification
SHA-512 Hasher
Generate SHA-512 hashes with maximum security from text or files
Password Generator
Generate secure passwords with customizable criteria. Supports character types, length control, symbol categories, and exclusion options. Cryptographically secure random generation.
Password Strength Checker
Analyze password strength with detailed scoring system. Check against common vulnerabilities, length requirements, character diversity, and security best practices.
AES File Encryption
Encrypt and decrypt files using AES-256-GCM encryption with password protection. Secure client-side processing with PBKDF2 key derivation and authenticated encryption.
Data Conversion
8 tools available
Base64 Converter
Encode and decode Base64 strings
IPv4 Hex Converter
Convert IPv4 addresses to hexadecimal notation and vice versa
CSV to JSON Converter
Convert CSV data to JSON format with table preview
Excel to JSON Converter
Convert Excel files (.xlsx, .xls) to JSON format with multi-sheet support
UUID to Short Form Converter
Convert UUIDs to shorter formats: flickrBase58, cookieBase90, and uuid25Base36
JSON to CSV Converter
Convert JSON data to CSV format with customizable delimiters and headers
Time to Unix Converter
Convert dates and times to Unix timestamps or convert Unix timestamps back to human-readable dates
Timezone Converter
Convert time between different timezones with comprehensive timezone list
Color & Design
3 tools available
Color Variations Generator
Generate lighter, darker, alpha, and contrast-sufficient color variations
Color Contrast Checker
Check color contrast ratio and WCAG accessibility compliance between foreground and background colors
5-Color Palette Generator
Generate harmonious random color palettes with lock functionality
Development Tools
8 tools available
UUID Generator
Generate UUIDs (v4 and v7) with customizable options
UUID Validator
Validate UUIDs and identify their version (v4/v7)
JSON Validator
Validate JSON syntax and format with detailed error messages
NDJSON Validator
Validate NDJSON format and convert to standard JSON arrays
Browser Size Calculator
Real-time browser viewport size detector with visual ruler interface
XML Formatter & Validator
Professional XML linter, beautifier, and minifier with syntax validation
YAML Linter
Validate YAML syntax, format, and structure with detailed error reporting
TOML Linter
Validate TOML syntax, format, and structure with detailed error reporting
Document & Media
6 tools available
Image Color Picker
Extract pixel colors from images, get hex and RGB values instantly
PDF to PNG Converter
Convert PDF pages to high-quality PNG images with page selection
Image Base64 Converter
Convert images to Base64 data URLs and decode Base64 back to images
PDF Splitter & Reorder
Split PDF files, reorder pages by drag and drop, remove specific pages, and download the reorganized PDF
Word Count Tool
Analyze text with intelligent word, character, and sentence counting. Auto-adapts for English, Chinese, and Japanese text with cultural relevance.
PDF Merger
Merge multiple PDF files into a single document with page ordering support. Drag-and-drop file upload with preview functionality
Calculators & Math
3 tools available
Generators & QR
1 tools available