Security Tools

Hash files, test password strength, and encrypt files with a password — all entirely inside your browser. No uploads, no accounts; your data never leaves your device.

Files never leave your device

Hash & Checksum

Compute BLAKE3, SHA-256/512, SHA-1, MD5, and CRC32 checksums of one or many files or text, and verify them against an expected hash — free, in your browser, no uploads.

Password Strength & Hash

Check how strong a password is (zxcvbn), and generate or verify Argon2id and bcrypt password hashes — all in your browser. Your password is never sent anywhere.

Encrypt / Decrypt Files

Encrypt any file with a password using ChaCha20-Poly1305 or AES-256-GCM (Argon2id key derivation), and decrypt it back — 100% in your browser, no uploads.

JWT Decoder & Verifier

Decode a JSON Web Token to read its header and claims, and verify the signature (HS256, RS256, ES256) — entirely in your browser. Nothing is uploaded.

TOTP Generator & Setup

Generate live TOTP authenticator codes from a base32 secret with a countdown, or create a brand-new secret with an otpauth:// URI and scannable QR code — entirely in your browser.

Key Pair Generator

Generate a new Ed25519, ECDSA P-256, or RSA-2048 key pair — PEM private/public keys plus an OpenSSH public key line — entirely in your browser. Nothing is uploaded.