Security Tools
21 tools
Hash generators, encryption utilities, and security validation tools
AES Decryption Tool — OpenSSL & CryptoJS Compatible
Security Tools
Decrypt AES online — GCM/CBC/CTR, passphrase or raw key, auto-detects OpenSSL & CryptoJS "U2FsdGVkX1" format. 100% in-browser, keys never leave the page.
AES Encryption Tool — GCM, CBC & CTR
Security Tools
Free online AES encryption — AES-128/192/256, GCM/CBC/CTR, passphrase (PBKDF2) or raw key. Runs 100% in your browser; nothing is uploaded.
Bcrypt Hash Generator & Verifier
Security Tools
Generate and verify bcrypt password hashes online — adjustable cost, $2b$/$2a$/$2y$ prefixes. 100% in your browser; your password is never uploaded.
CRC Checksum Calculator
Security Tools
Paste hex or text and get all 63 CRC-8, CRC-16 and CRC-32 variants at once. Got a checksum you cannot match? Type it in and the tool names the variant — MODBUS, CCITT-FALSE, XMODEM, KERMIT. Runs entirely in your browser.
DES / 3DES Encrypt & Decrypt Tool
Security Tools
DES encrypt/decrypt in your browser: single DES, 3DES (2-key/3-key), ECB/CBC, PKCS#7 (Java's PKCS5Padding). Key lengths validated strictly — never silently truncated. Includes an equivalent OpenSSL command. Nothing is uploaded.
HMAC Generator & Signature Verifier
Security Tools
Free online HMAC generator & verifier — compute or verify HMAC-SHA256/SHA1/384/512 with Text, Hex or Base64 keys and Hex/Base64/Base64URL output. 100% in your browser; your secret key never leaves the page.
JWT Decoder
Security Tools
Decode JWT tokens online with our free JWT decoder. Instantly inspect header, payload, signature, expiration, algorithm, and claims. 100% browser-based — your token never leaves your device. No signup.
JWT Encoder & Generator
Security Tools
Free online JWT generator & encoder. Build the header and payload, sign with HS256, RS256, or ES256 instantly. 100% in-browser — your secret and key never leave your device.
Free JWT Secret Generator — HS256/384/512
Security Tools
Generate a strong, RFC-correct JWT secret for HS256/384/512 — 100% in your browser, never sent to a server. base64url, base64 or hex; copy for .env.
MD5 Hash Generator & File Checksum Tool
Security Tools
Generate MD5, SHA-256, SHA-1 & SHA-512 hashes online for free. Hash text or files in your browser, verify checksums and copy results. No signup needed.
Random Password Generator — Customizable, Strong & Secure
Security Tools
Generate strong random passwords instantly — free, 100% in your browser. Customize length & characters, batch up to 50 with entropy analysis.
Free Online RSA Key Pair Generator — ECDSA and Ed25519
Security Tools
Generate an RSA key pair online — the private key never leaves your browser. RSA 2048/4096, ECDSA and Ed25519, in PKCS#8 or PKCS#1 PEM, with JWK and fingerprint.
SHA-1 Hash Generator (160-bit Legacy)
Security Tools
Generate SHA-1 hashes in your browser — 40-character hex output, no upload. Legacy tool for Git fingerprints, old certificate checks, and migration audits. Data never leaves your device.
SHA-256 Hash Generator & Checksum Tool
Security Tools
Generate SHA-256 hashes online for free. Hash text or files in your browser, verify checksums, and copy 64-character hex output. No signup; data never leaves the page.
SHA-3 Hash Generator (Keccak SHA3-256)
Security Tools
Generate SHA-3 hashes online free. NIST FIPS 202 sponge construction — the post-SHA-2 standard. SHA3-256 output in 64 hex chars. Browser-only via lazy-loaded js-sha3; zero uploads.
SHA-384 Hash Generator (TLS Suite B Hash)
Security Tools
Generate SHA-384 hashes online — 96-character hex output, length-extension immune, NSA Suite B compliant. Paired with AES-256-GCM in TLS. All hashing runs in your browser via Web Crypto API.
SHA-512 Hash Generator (512-bit SHA-2)
Security Tools
Generate SHA-512 hashes online — 128 hex chars output, faster than SHA-256 on 64-bit CPUs. Ideal for long-term archives, LUKS key derivation, and HMAC-SHA-512. Browser-only, zero uploads.
SM4 Encrypt & Decrypt Online
Security Tools
Encrypt and decrypt SM4 online. If decryption fails, it finds whether the mode, padding, IV or encoding is wrong and offers the fix. Runs in your browser; nothing is uploaded. ECB, CBC, CTR, CFB, OFB; PKCS#7, zero or no padding.
TOTP / 2FA Code Generator
Security Tools
Generate a TOTP/2FA code from a Base32 secret instantly — 100% in your browser, your secret never leaves your device. QR setup + code verify. Free, no signup.
Free ULID Generator — Generate, Decode & Convert ULIDs
Security Tools
Generate, decode, and convert ULIDs online — free and 100% in your browser. Extract the embedded timestamp from any ULID, convert ULID to UUID and back, batch-generate, with a monotonic mode. Nothing is ever sent to a server.
UUID Generator & Decoder — v1, v4, v5, v7 Batch Mode
Security Tools
Free UUID generator — create v1, v4, v5, v7 UUIDs instantly. Decode & validate any UUID. Batch generate up to 50. No signup, 100% browser-based.