WebCryptoTools v1.0 Zero-Telemetry WebCrypto
Directory · 105 Live Utilities

Developer Cryptography & Security Catalog

Search and filter across our full suite of 105 client-side tools. Zero telemetry, zero server uploads, and native hardware performance.

SHA-256 Popular

SHA-256 Hash Generator

Calculate 256-bit SHA-256 cryptographic hashes instantly in your browser using the native Web Cryptography API. Zero data upload, 100% private.

hashing Launch Tool →
SHA-512 FIPS 180-4

SHA-512 Hash Generator

Compute 512-bit SHA-512 cryptographic digests locally in your browser. Generates 128-character hexadecimal hashes with zero server transmission.

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SHA-384

SHA-384 Hash Generator

Generate 384-bit SHA-384 cryptographic digests in your browser. Standard for Suite B cryptographic algorithms and TLS 1.3.

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SHA-224

SHA-224 Hash Generator

Calculate 224-bit SHA-224 cryptographic digests. Useful for two-key Triple DES matching and legacy compliance.

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SHA-1 Legacy / Git

SHA-1 Hash Generator

Calculate 160-bit SHA-1 hashes client-side. Commonly used for Git commit hashing and checksum verification.

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MD5 Checksum

MD5 Hash Generator

Generate 128-bit MD5 checksums instantly in your browser. Ideal for cache keys, file verification, and legacy checksums.

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MD4 NTLM / Legacy

MD4 Hash Generator

Calculate MD4 cryptographic message digests. Used in Microsoft NTLM password hashes and legacy protocol research.

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Keccak-256 Ethereum Web3

Keccak-256 Hash Generator

Calculate Ethereum Keccak-256 hashes in your browser. Standard for Solidity function selectors, ERC-20 signatures, and smart contracts.

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Keccak-512

Keccak-512 Hash Generator

Generate 512-bit Keccak-512 cryptographic digests. High-security pre-NIST Sponge function used in advanced cryptographic systems.

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SHA3-256 NIST FIPS 202

SHA3-256 Hash Generator

Compute official NIST FIPS 202 SHA3-256 cryptographic hashes locally in your browser. Next-generation Keccak-based hashing.

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SHA3-512

SHA3-512 Hash Generator

Generate 512-bit SHA3-512 cryptographic digests. Maximum security standard of the NIST FIPS 202 sponge algorithm family.

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SHA3-384

SHA3-384 Hash Generator

Calculate 384-bit NIST SHA3-384 cryptographic digests with zero server logging. 96-hex character output.

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SHA3-224

SHA3-224 Hash Generator

Calculate 224-bit NIST SHA3-224 cryptographic digests locally in your browser. 56-hex character output.

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RIPEMD-160 Bitcoin Standard

RIPEMD-160 Hash Generator

Calculate 160-bit RIPEMD-160 cryptographic hashes. Used in Bitcoin address generation (HASH160: SHA256 + RIPEMD160).

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CRC-32 Integrity

CRC-32 Checksum Calculator

Calculate 32-bit cyclic redundancy check (CRC-32) checksums. Standard for ZIP archives, PNG chunks, and Ethernet frames.

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CRC-16

CRC-16 Checksum Calculator

Calculate 16-bit CRC-16 checksums (Modbus, CCITT, XMODEM standards) in your browser for embedded systems and serial protocols.

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BLAKE2b Ultra Fast

BLAKE2b Hash Generator

Compute 512-bit BLAKE2b cryptographic hashes. Faster than MD5, SHA-1, and SHA-256 while providing equal or greater security.

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BLAKE2s

BLAKE2s Hash Generator

Compute 256-bit BLAKE2s cryptographic hashes optimized for 8 to 32-bit platforms, embedded devices, and WireGuard protocols.

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BLAKE3 Next-Gen

BLAKE3 Hash Generator

Calculate next-generation BLAKE3 cryptographic hashes. Highly parallel tree-hashing algorithm providing maximum performance and security.

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Whirlpool ISO/IEC 10118-3

Whirlpool Hash Generator

Generate 512-bit Whirlpool cryptographic digests based on a modified Advanced Encryption Standard (AES) cipher block structure.

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Bcrypt Standard

Bcrypt Hash Generator

Generate secure Blowfish-based Bcrypt password hashes ($2a$, $2b$, $2y$) with configurable salt work factor rounds (4 to 14) in your browser.

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Bcrypt Verify Matcher

Bcrypt Hash Verifier

Verify if a plaintext password matches an existing Bcrypt hash string ($2a$, $2b$, $2y$). 100% client-side verification.

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PBKDF2 RFC 2898

PBKDF2 Key Derivation Generator

Derive cryptographic keys using Password-Based Key Derivation Function 2 (PBKDF2) with SHA-256, configurable iterations and salt in your browser.

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HMAC-SHA256 API Standard

HMAC-SHA256 Generator

Generate Hash-based Message Authentication Codes (HMAC-SHA256) with a secret key. Standard for AWS, Stripe, GitHub and Twilio webhook signatures.

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HMAC-SHA512

HMAC-SHA512 Generator

Compute 512-bit HMAC-SHA512 message authentication codes using shared secret keys in your browser.

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HMAC-MD5

HMAC-MD5 Generator

Calculate HMAC-MD5 keyed-hash message authentication codes for legacy API compatibility and network protocol verification.

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HMAC-SHA1 OAuth 1.0a

HMAC-SHA1 Generator

Compute HMAC-SHA1 signatures. Standard signature method for OAuth 1.0a, TOTP (Google Authenticator) and legacy systems.

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NIST Entropy Security Audit

Password Entropy & Strength Analyzer

Calculate mathematical Shannon entropy in bits, crack-time estimations, character space analysis, and NIST SP 800-63B compliance locally in your browser.

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Diceware / WebCrypto EFF Wordlist

Diceware Passphrase Generator

Generate memorable, high-entropy multi-word passphrases using the official EFF wordlist and cryptographically secure random integers (crypto.getRandomValues).

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Web Crypto CSPRNG CSPRNG

Cryptographically Secure Password Generator

Generate high-entropy random passwords using window.crypto.getRandomValues. Configure length, symbols, numbers, and avoid ambiguous characters.

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Scrypt Memory-Hard

Scrypt Hash Generator

Compute memory-hard Scrypt key derivations and password hashes. Designed to resist hardware ASIC and GPU brute-force cracking.

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Argon2id PHC Winner

Argon2 Hash Generator

Calculate Argon2id, Argon2i, and Argon2d hashes. Winner of the Password Hashing Competition (PHC) and modern gold-standard for password storage.

passwords Launch Tool →
RFC 7519 Zero-Telemetry

JWT Token Decoder

Decode and inspect JSON Web Tokens (JWT) client-side. Parse header, payload claims (iss, sub, exp, iat), and signature without sending tokens to any server.

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HMAC / RSA HS256 / RS256

JWT Signature Verifier

Verify HMAC (HS256, HS384, HS512) or RSA/ECDSA signatures of JWT tokens client-side using Web Crypto API. Confirm payload integrity locally.

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RFC 7519 Sign Creator

JWT Token Builder & Signer

Build and sign custom JSON Web Tokens (JWT) in your browser. Configure claims, expiration (exp), audience (aud), and sign with HS256 or RS256.

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RFC 7519 Claims Time Claims

JWT Expiration & Claims Inspector

Inspect JWT expiration (exp), issued-at (iat), and not-before (nbf) timestamps with human-readable local time, countdown timers, and validity checks.

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JWK/PEM RFC 7517

JWK to PEM Converter

Convert JSON Web Keys (JWK) into standard PKCS#8 or SPKI PEM formatted public and private keys in your browser.

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PEM/JWK RFC 7517

PEM to JWK Converter

Convert standard PEM public or private keys into JSON Web Key (JWK) format for OAuth 2.0 and OpenID Connect JWKS endpoints.

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PASETO Modern RFC

PASETO Token Decoder

Decode and inspect PASETO (Platform-Agnostic Security Tokens) v1, v2, v3, and v4 local and public tokens without leaking claims.

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CSPRNG Base62 Custom Prefix

Secure API Key Generator (with Custom Prefix)

Generate high-entropy API keys with custom prefixes (e.g., sk_live_..., pk_test_..., ghp_...) and CRC32 checksum verification tails in your browser.

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CSPRNG Hex/Base64 Web Security

CSRF Token Generator

Generate cryptographically random Cross-Site Request Forgery (CSRF / XSRF) anti-tamper tokens in Hex and Base64 format locally.

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OAuth 2.0 Bearer

Bearer Token Generator

Generate OAuth 2.0 Bearer authentication tokens with high cryptographic randomness for testing API authorization headers.

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Fernet AES-CBC Python / Cryptography

Fernet Token Decoder

Decode and inspect Python cryptography Fernet symmetric tokens. Parse timestamp, initialization vector (IV), ciphertext, and HMAC.

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JSON Parser

JWT to JSON Payload Converter

Extract and format the payload of any JWT into formatted, beautified JSON with one click. Clean, minimal, and fast.

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AES-GCM AEAD Standard

AES-256-GCM Encryptor & Decryptor

Authenticated encryption and decryption using AES-256-GCM (Galois/Counter Mode) via the native Web Cryptography API. Total data privacy.

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AES-GCM

AES-128-GCM Encryptor & Decryptor

Encrypt and decrypt data using 128-bit AES-GCM via browser WebCrypto. Fast, authenticated symmetric encryption.

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AES-CBC PKCS#7

AES-256-CBC Encryptor & Decryptor

Encrypt and decrypt using AES-256-CBC (Cipher Block Chaining) with PKCS#7 padding and random initialization vectors in your browser.

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AES-CBC

AES-128-CBC Encryptor & Decryptor

Encrypt and decrypt using 128-bit AES in CBC mode with PKCS#7 padding client-side.

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AES-CTR

AES-CTR Stream Encryptor & Decryptor

Encrypt and decrypt data using AES in Counter (CTR) mode. Converts block ciphers into stream ciphers with zero padding required.

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ChaCha20-Poly1305 TLS 1.3 / WireGuard

ChaCha20-Poly1305 Encryptor

Encrypt data using ChaCha20-Poly1305 AEAD stream cipher. High-speed cipher used in WireGuard, TLS 1.3 and Android devices.

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Triple DES Banking Legacy

Triple DES (3DES) Encryptor

Encrypt and decrypt using Triple DES (EDE3 / 3DES) for legacy financial systems and banking smart card compliance.

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DES Legacy 56-bit

DES Encryptor & Decryptor

Encrypt and decrypt data using the historic 56-bit Data Encryption Standard (DES). For cryptographic education and legacy research.

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Blowfish

Blowfish Encryptor & Decryptor

Encrypt and decrypt text using Bruce Schneier's classic Blowfish symmetric block cipher with variable key lengths up to 448 bits.

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RC4 (ARCFOUR) Historical

RC4 Stream Cipher Encryptor

Encrypt and decrypt data using the classic Rivest Cipher 4 (RC4 / ARCFOUR) stream cipher for security research and WEP/SSL analysis.

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XOR

XOR String Cipher Encryptor

Perform symmetric bitwise XOR encryption and decryption on strings with repeating multi-character keys.

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ROT13 / Caesar Classic

ROT13 & Caesar Cipher Tool

Encrypt and decrypt text with ROT13, ROT47, and classical Caesar substitution ciphers with custom alphabet shift values.

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RSA-OAEP / PSS Popular

RSA Key Pair Generator (2048 & 4096-bit)

Generate cryptographically secure 2048-bit, 3072-bit, and 4096-bit RSA public and private key pairs in standard PKCS#8 and SPKI PEM format in your browser.

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Ed25519 Modern EdDSA

Ed25519 Key Pair Generator

Generate high-speed, collision-resistant Ed25519 Edwards-curve Digital Signature Algorithm key pairs in OpenSSH and PEM formats.

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X25519 ECDH

Curve25519 Key Pair Generator

Generate Curve25519 (X25519) key pairs for Diffie-Hellman key exchange. Used in Signal Protocol, WireGuard, and WhatsApp encryption.

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ECDSA P-256 NIST secp256r1

ECDSA P-256 Key Pair Generator

Generate NIST P-256 (secp256r1 / prime256v1) elliptic curve public and private key pairs via browser WebCrypto for TLS and WebAuthn/Passkeys.

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ECDSA P-384

ECDSA P-384 Key Pair Generator

Generate high-security NIST P-384 (secp384r1) elliptic curve key pairs for Suite B commercial national security systems.

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secp256k1 Blockchain

secp256k1 (Bitcoin/Ethereum) Key Pair Generator

Generate Koblitz curve secp256k1 key pairs used by Bitcoin, Ethereum, and EVM blockchains. View private key, public key, and derived uncompressed hex.

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OpenSSH OpenSSH Format

SSH Key Pair Generator (OpenSSH / ed25519 / RSA)

Generate SSH keys (ed25519 and RSA 4096) directly in OpenSSH format (id_ed25519 and id_ed25519.pub) for GitHub, GitLab, and Linux servers.

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RSA-OAEP RSA-OAEP

RSA Public Key Encryptor

Encrypt secret payloads using an RSA public key (RSA-OAEP with SHA-256) in your browser. Only the private key holder can decrypt.

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RSA-OAEP Client-Side Only

RSA Private Key Decryptor

Decrypt RSA-OAEP encrypted payloads using your private key locally in your browser. Safe execution with zero network telemetry.

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Digital Signature RSASSA-PKCS1 / PSS

Digital Signature Signer (RSA/ECDSA)

Sign messages, hashes, and contracts using an RSA or ECDSA private key with SHA-256. Generate verifiable digital signatures in your browser.

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Signature Verify Integrity Check

Digital Signature Verifier

Verify digital signatures against a plaintext message using an RSA or ECDSA public key in your browser. Confirm data integrity.

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OpenPGP RFC 4880 OpenPGP

PGP / GPG Public Key Inspector

Inspect OpenPGP (GPG) public key blocks (-----BEGIN PGP PUBLIC KEY BLOCK-----). Parse Key ID, User ID, creation date, subkeys, and algorithm client-side.

keys Launch Tool →
X.509 ASN.1 Popular

X.509 Certificate (PEM/CRT) Decoder

Decode and inspect X.509 SSL/TLS certificates (PEM/CRT format) client-side. View Subject, Issuer, Validity Period, SANs, and Serial Number with zero data leaks.

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X.509 Dates Countdown

SSL Certificate Expiry & Validity Checker

Check the exact validity period, notBefore, notAfter, and countdown days remaining before your SSL/TLS certificate expires.

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PKCS#10 PKCS#10

CSR (Certificate Signing Request) Decoder

Decode Certificate Signing Requests (CSR) in PEM format (-----BEGIN CERTIFICATE REQUEST-----). Verify Common Name (CN), Organization, and SANs before submitting to a CA.

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X.509 Generator Dev / Testing

Self-Signed SSL Certificate Generator

Generate self-signed SSL/TLS certificates and private keys locally in your browser for local development (localhost), Docker, and staging environments.

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ASN.1 Binary

PEM to DER Converter

Convert ASCII Base64 PEM certificates and keys into raw binary DER (Distinguished Encoding Rules) format in your browser.

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Base64 ASN.1

DER to PEM Converter

Convert binary DER certificates and keys into standard Base64 PEM format with appropriate header tags in your browser.

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PKCS#12 .pfx / .p12

PFX / PKCS#12 Certificate Inspector

Inspect PFX / PKCS#12 bundle archives locally in your browser. Inspect certificate chains, friendly names, and bag attributes without uploading files.

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RFC 5280 CRL Revocation

CRL (Certificate Revocation List) Parser

Parse Certificate Revocation Lists (CRL). Inspect revoked certificate serial numbers, revocation dates, and next-update timestamps client-side.

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IANA TLS TLS 1.2 / 1.3

TLS Cipher Suite Explainer & Lookup

Look up and dissect TLS 1.2 and TLS 1.3 cipher suites (e.g., TLS_AES_256_GCM_SHA384, ECDHE-RSA-AES128-GCM-SHA256). Learn key exchange, authentication, encryption, and MAC algorithms.

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X.509 SAN Multi-Domain

SAN (Subject Alternative Name) SSL Inspector

Extract and inspect Subject Alternative Names (SAN) from SSL/TLS certificates. View all authorized domains, subdomains, and wildcard entries.

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RFC 4648 Base64 Popular

Base64 Encoder & Decoder

Encode plaintext into Base64 or decode Base64 into UTF-8 strings and binary byte arrays in your browser. Fast, bidirectional, and private.

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RFC 4648 Base64URL URL Safe

Base64URL Safe Encoder & Decoder

Convert between standard Base64 and URL-safe Base64URL (- instead of +, _ instead of /, no = padding). Standard for JWT tokens and web URLs.

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Base58 Crypto Standard

Base58 (Bitcoin/Solana) Encoder & Decoder

Encode and decode Base58 strings used across Bitcoin, Solana, and IPFS. Excludes confusing characters (0, O, I, l) to prevent human reading errors.

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RFC 4648 Base32 RFC 4648

Base32 Encoder & Decoder

Encode and decode Base32 strings. Standard for TOTP two-factor authentication secret keys (Google Authenticator) and Tor onion addresses.

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Ascii85

Base85 / Ascii85 Encoder & Decoder

Encode and decode Base85 (Ascii85) binary-to-text strings. Used in Adobe PDF files, Git binary patches, and btoa IPv6 representations.

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Hex Decoder

Hex to String (ASCII/UTF-8) Converter

Convert raw hexadecimal byte sequences (0x48656c6c6f) into human-readable ASCII and UTF-8 strings client-side.

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Hex Encoder

String to Hex Converter

Convert plain text and Unicode strings into continuous or space-separated hexadecimal byte sequences.

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Hex/Binary

Hex to Binary Converter

Convert hexadecimal strings into 8-bit padded binary strings (0s and 1s) with byte grouping in your browser.

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Binary/Hex

Binary to Hex Converter

Convert binary sequences (0s and 1s) into clean, compact hexadecimal strings client-side.

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Binary Decoder

Binary to Text (ASCII) Converter

Convert 8-bit binary code (01001000 01101001...) into readable ASCII and UTF-8 characters in your browser.

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Binary Encoder

Text to Binary Converter

Convert plain text and symbols into 8-bit binary bytes (0s and 1s) with space separation in your browser.

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Percent-Encoding

URL Component Encoder & Decoder

Percent-encode special characters in URLs (encodeURIComponent) or decode percent-encoded URLs into clean strings client-side.

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HTML Entities

HTML Entity Encoder & Decoder

Convert special HTML characters (&, <, >, ", ') into safe HTML entities (&amp;, &lt;, &gt;) to prevent Cross-Site Scripting (XSS).

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Punycode IDNA RFC 3492

Punycode (IDN) International Domain Converter

Convert Internationalized Domain Names (IDN) with Unicode characters to ASCII Punycode (xn--...) and vice versa client-side.

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Base-8 Octal

Octal to Text & Text to Octal Converter

Convert base-8 octal byte sequences into readable text characters and convert plain text into octal notation in your browser.

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RFC 4122 v4 Standard

UUID v4 (Random) Generator

Generate cryptographically random UUID v4 (Universally Unique Identifiers) in your browser using window.crypto.getRandomValues. Bulk generation available.

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RFC 9562 v7 New RFC 9562

UUID v7 (Time-Ordered Modern RFC 9562) Generator

Generate time-ordered UUID v7 identifiers specified in RFC 9562. Combines millisecond Unix timestamp with random bits for optimal database B-Tree index performance.

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RFC 4122 v1

UUID v1 (Timestamp-Based) Generator

Generate timestamp and MAC/node-based UUID v1 identifiers client-side. Inspect timestamp and sequence components.

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RFC 4122 v5

UUID v5 (Namespace SHA-1) Generator

Generate deterministic name-based UUID v5 identifiers using SHA-1 hashing of a namespace (DNS, URL, OID) and name string in your browser.

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ULID Spec Sortable 128-bit

ULID (Universally Unique Lexicographically Sortable ID) Generator

Generate 26-character Crockford Base32 ULID identifiers. 128-bit compatibility with UUIDs, 1-millisecond timestamp precision, and URL-safe characters.

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ULID Parser

ULID Timestamp & Randomness Decoder

Decode 26-character ULID strings into their exact Unix millisecond timestamp, human-readable ISO date, and 80-bit randomness payload in your browser.

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NanoID CSPRNG Compact & Safe

NanoID Secure Collision-Resistant ID Generator

Generate compact, URL-friendly unique IDs using the NanoID algorithm. Smaller than UUID (21 characters) with equal or higher collision resistance.

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CUID2 Next-Gen ID

CUID2 Secure Next-Gen Unique ID Generator

Generate collision-resistant, horizontal-scale CUID2 identifiers designed for modern web applications and distributed databases.

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Segment KSUID

KSUID (K-Sortable Unique ID) Generator

Generate Segment K-Sortable Unique Identifiers (KSUID). 27-character base62 strings sorted naturally by second-level timestamp.

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64-bit Snowflake Discord / Twitter

Discord/Twitter Snowflake ID Timestamp Extractor

Extract exact creation timestamps, worker IDs, and sequence numbers from 64-bit Snowflake IDs used by Discord, Twitter (X), and Mastodon in your browser.

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BIP-39 CSPRNG Web3 Wallet

BIP-39 Mnemonic Seed Phrase Generator (12/24 Words)

Generate 12-word (128-bit) and 24-word (256-bit) BIP-39 mnemonic seed phrases using browser CSPRNG. Safe offline simulation with zero secrets logged.

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Base58 / EIP-55 Multi-Chain

Crypto Address Validator (BTC, ETH, SOL)

Validate public blockchain addresses for Bitcoin (Legacy, SegWit, Taproot), Ethereum (EIP-55 checksum validation), and Solana in your browser.

identifiers Launch Tool →