A fast, clean unit converter for everyday use. Convert between 40+ units across 6 categories: Length, Weight, Temperature, Area, Volume, and Speed. Real-time conversion, swap button, quick reference table, and temperature formula handling. 100% client-side — instant results with no server round-trips.
A zero-knowledge, military-grade password vault that runs entirely in your browser. KDBX4 format with ChaCha20 encryption and Argon2id key derivation — your secrets never leave your device. Everything is encrypted and decrypted client-side via WebCrypto: no accounts, no uploads, no server-side storage. Quick unlock with Touch ID/FaceID/Windows Hello via WebAuthn passkeys, and full portability with standard .kdbx files that open in KeePassXC, Strongbox, and KeePassDX. Your vault, your keys, your device.
Free AI translation app with auto language detection, EN↔中文 default, tabs for English/中文/Français/Español/日本語 + full dropdown of 45+ languages. Includes dictionary panel (definition, pronunciation, voice, similar/opposite words, example sentences) and localStorage history. Built on free APIs, no sign-in required.
Family habit tracking with multi-profile support, minutes-based logging, and lower-is-better screen-time budgets. Track daily habits for the whole family — EN default, 中文 toggle included.
A clean, fast message encryption and decryption tool using AES-GCM 256-bit encryption. Enter a message and a secret passphrase to encrypt, or paste an encrypted string with the key to decrypt. Features PBKDF2 key derivation, random IV per encryption, one-click copy, swap, and reset. No server, no tracking — everything runs locally in your browser.
Encode and decode Base64 strings instantly with auto-processing, URL-safe mode, swap function, and file-to-Base64 conversion. Supports Unicode text encoding with drag-and-drop file uploads up to 5MB. Copy, paste, and swap between encode/decode modes seamlessly. 100% client-side.
Real-time text analysis tool with word count, character count (with and without spaces), sentence and paragraph counts, reading and speaking time estimates, Flesch reading ease score, keyword density with stop-word filtering, lexical diversity, average word/sentence length, and word goal progress bar. Perfect for writers, students, and content creators.
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