Explore hundreds of free online tools
BMI Calculator
Whitespace cleaner (trim, collapse spaces, remove double spaces)
Convert between encodings (UTF-8/Latin-1) basic
HTML preview sandbox (safe, local)
“Keyboard layout heatmap” (paste text → show key frequency)
Curtain fabric calculator (pleat fullness)
BTU room estimate (simple heuristic inputs)
Print size calculator (pixels ↔ inches/cm at DPI)
Math game
Attention game
Oddball game
Digit Span Test Number Memory Game
Falling Math
QR Code Scrambler
Key Phrase Text Encryptor
Pixel Grid Encryption
Triple Key Text Encryptor
Shareable Encrypted Message
Image Encryption/Decryption Tool
have nice day
