QR Code Generator
Generate QR codes for text, URLs, and more
Generate QR codes for text, URLs, and more
Beautify and validate JSON data
Base64 encoding and decoding
URL parameter encoding and decoding
Test and debug regular expressions
Format JS, HTML, and CSS code
Generate strong random passwords
Generate UUID v4 identifiers
Convert between Unix timestamps and dates
Length, weight, temperature conversion
Binary/Octal/Decimal/Hex converter
Decode JWT token payload
Count words, characters, and paragraphs
Live preview Markdown editor
Generate placeholder text
Pick colors and convert between formats
Compress images in browser
Compare text differences
Generate CSS gradient backgrounds
Focus timer for productivity
Calculate Body Mass Index
Real-time fund valuation and NAV query
Build structured prompts for ChatGPT, Claude, and Midjourney
Guess whether text was written by AI or a human
Generate random prompts for Midjourney and Stable Diffusion
Classic number puzzle game
Test your reaction time
Test your typing speed in WPM
Click to earn coins, buy upgrades, auto-earn
Mine ores, upgrade tools, hire miners
Auto-battle RPG, upgrade gear, fight bosses
Chinese national standard SM2 ECC encryption, decryption, signing
Chinese national standard SM3 cryptographic hash
Chinese national standard SM4 block cipher encryption/decryption
AES symmetric encryption with ECB/CBC/GCM modes
RSA asymmetric key generation, encryption and decryption
DES and 3DES symmetric encryption/decryption (ECB/CBC)
MD5, SHA-1, SHA-256, SHA-384, SHA-512 hash
HMAC-MD5/SHA1/SHA256 message authentication code