Tool Directory
Security Tools
For encryption, signature verification, certificate inspection, and TLS checks.
File Digest / Password Hash Lab
Compute file digests, password hashes, and verification results in the browser with SHA, BLAKE3, Argon2id, bcrypt, scrypt, and PBKDF2.
AES Text Encrypt / Decrypt
Encrypt and decrypt text in the browser with AES-GCM or AES-CBC, using either passphrase-derived keys or raw keys with copyable payload output.
JWT Decode / Verify
Decode JWT header and payload in the browser, then verify signatures and claims with shared secrets, PEM public keys, or JWK input.
RSA / PEM / JWK Toolbox
Generate RSA / EC keys, convert PEM and JWK material, and run compact JWS signing and verification in the browser.
File AES Encrypt / Decrypt
Encrypt and decrypt local files in the browser with AES-GCM, using passphrase-derived keys or raw keys, and export a recoverable binary package.
Certificate / CSR / Public Key Viewer
Inspect x509 certificates, CSRs, and PEM public keys in the browser, including subject, issuer, validity, SAN, fingerprints, and common extensions.
HMAC / Webhook Signature Verifier
Generate HMAC signatures in the browser and verify GitHub, Stripe, Slack, or generic webhook signature headers.
Certificate Chain / TLS Checker
Check certificate-chain order, signature relationships, validity windows, CA constraints, and TLS hostname matching in the browser.
Remote TLS Report
Connect to a remote site to inspect TLS handshake details, certificate chains, protocol, cipher, hostname checks, and the PEM bundle.