AES Encryption/Decryption Tool
Free online AES encryption and decryption tool. Supports AES-128, AES-192, AES-256 with multiple modes (CBC, ECB, CFB, OFB).
Bee Tools - Free Online Tools Collection
Bee Tools provides a rich collection of free online tools, including AES encryption/decryption, Cron expression generator, online tuner and more practical tools. Simple to use, no download required.
Developer Tools
SM4 Encryption/Decryption Tool
Online SM4 encryption and decryption tool. Supports ECB/CBC modes and PKCS padding. Chinese national standard symmetric encryption algorithm.
Base64 Encoder/Decoder
Free online Base64 encoder and decoder. Encode text to Base64 or decode Base64 to text instantly. Supports file conversion, no download required.
Cron Expression Generator
Generate and validate Cron expressions online with an intuitive visual builder. Get next/previous execution times for scheduled tasks.
Hash Calculator Tool
Calculate MD5, SHA1, SHA256, SHA512, and other hash values online. Verify data integrity with fast and accurate hash computation.
JSON⇋YAML Converter
Free online JSON to YAML and YAML to JSON converter. Format, validate, and convert between JSON and YAML with syntax highlighting.
JWT Encoder/Decoder
Decode and verify JWT tokens online. View payload, header, and signature information. Validate tokens with secret keys.
Password Generator
Generate strong, secure random passwords online. Customize length and character types including uppercase, lowercase, numbers, and symbols.
RSA Key Generator
Generate RSA public-private key pairs online. Support for multiple key lengths (1024, 2048, 4096 bits) and encryption algorithms.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports multiple date formats with timezone conversion functionality.
Image Format Converter
Convert images between PNG, JPEG, WebP, and other formats instantly in your browser. No upload needed, privacy-friendly.
Excel to SQL Converter
Convert Excel (.xlsx, .xls) and CSV files to SQL INSERT statements online. Generate SQL for MySQL, PostgreSQL, SQLite databases.
QR Code Generator & Decoder
Generate QR codes online for URLs, text, WiFi, contacts, and more. Decode QR from uploaded images instantly.
Finance Tools
Compound Interest Calculator
Calculate compound interest and investment returns online. See how your money grows over time with different interest rates and compounding periods.
Early Repayment Calculator
Calculate interest savings from early loan repayment. Find the optimal repayment strategy and see how much you can save on interest.
Mortgage Calculator
Calculate mortgage monthly payments, total interest, and amortization schedule. Compare different loan terms and interest rates easily.
Math Tools
Permutation & Combination
Calculate permutations (nPr) and combinations (nCr) online. Step-by-step solutions for counting problems in mathematics.
Percentage Calculator
Free online percentage calculator. Calculate percentages, growth rates, discounts, and increase/decrease ratios. Fast and accurate results.
Age Calculator
Calculate exact age from date of birth in years, months, and days. Find total days lived and countdown to your next birthday.
Date Difference Calculator
Calculate the difference between two dates in days, weeks, months, and years. Perfect for finding age or time span between events.
Workday Calculator
Count business days between dates, exclude weekends, add or subtract workdays from any date. Perfect for project deadline planning.
Unit Converter
Convert length, weight, temperature, area, volume, speed, data, and more units instantly. All common units in one free tool.
BMI Calculator
Calculate BMI, BMR, and TDEE (daily calories) online. Understand your body metrics for health and fitness planning.
Music Tools
Games
Tetris
Play Tetris online for free. Arrange falling blocks to complete horizontal lines and score points. Classic puzzle game with modern gameplay. No download needed.
Snake
Play Snake game online for free. Control the snake to eat food and grow longer while avoiding walls and yourself. Classic arcade game, no download required.
House Master
Play House Master trading game online for free. Buy and sell commodities, invest in real estate, and accumulate wealth. Become the ultimate house master!
2048
Play 2048 puzzle game online for free. Slide and merge number tiles to reach 2048. Simple rules, challenging gameplay, no download required.