37 tools total
Strip whitespace, compress SQL/CSS/JS — shows compression ratio in real time
Convert between camelCase, snake_case, kebab-case and more; case conversion; symbol replacement
Convert numbers to Chinese words; format amounts in Chinese financial notation
Convert between Simplified and Traditional Chinese, covering 800+ common characters
Line-by-line diff with syntax highlighting, line numbers, and inline character changes
Live regex matching with highlight, multiple flags, and capture group details
Compress JPEG/PNG/WebP locally in your browser with adjustable quality
Convert between JPEG, PNG, WebP and AVIF formats with adjustable output quality
Resize images by pixels or percentage with optional aspect ratio lock
Split photos into 3×3 or other grid layouts for sharing
Add text watermarks with customizable position, color, opacity and rotation
Extract dominant colors from images, output HEX/RGB — essential for designers
AI-powered background removal, outputs transparent PNG, fully local processing
Shorten long URLs instantly, or expand short links back to their original URL
MD5, SHA-1, SHA-256, SHA-384, SHA-512 with optional HMAC mode
Format, minify, escape, unescape, sort keys — with real-time syntax validation
Convert JSON arrays to CSV and back — comma, semicolon or tab delimiter, Excel-compatible download
Encode/decode text, URL-safe mode, convert images to Base64 Data URI
Convert timestamps, compare time zones worldwide, calculate date differences
AES-256-GCM encryption, ROT13/Caesar/Vigenère classic ciphers, URL encode/decode
UUID, Snowflake ID, random strings and password generator with batch support
160+ kaomoji organized by category, click to copy instantly
Auto-detect your IP or look up any IP for country, city, ISP and timezone info
Step-by-step Chinese kinship calculator — figure out how relatives are addressed
Calculate monthly payments, total interest and repayment schedule for mortgages
2024 China income tax calculator with social insurance and special deductions
Real-time converter for length, weight, temperature, area, volume, time and speed
Calculate BMI and estimate body fat percentage from height, weight, age and gender
Visual Spring Boot cron expression builder with presets, DOW/month pickers, and live next-5-trigger preview
Subnet mask calculator, IP format converter (binary/hex/integer), CIDR subnet divider, and IP address list generator
Classic attention training — 3×3 to 6×6 grids, millisecond timer, auto-saves best times
Color-word interference test for inhibitory control and cognitive flexibility
Track position and letter N steps back simultaneously to train working memory
60-second countdown with real-time WPM/CPM/accuracy, supports Chinese and English
Click when the screen turns green — 5 rounds averaged, millisecond precision
Click green circles, hold back on red — 30 stimuli, tracks hit rate and false alarms
Enter wake-up time to get optimal bedtimes based on 90-min sleep cycles, with ratings