Encoding and Security Tools

Base64 Encode and Decode

Encode and decode UTF-8 text using Base64 safely in browser.

Base32 Base58 Base58Check Converter

Convert text and bytes between Base32, Base58, and Base58Check with checksum validation.

URL Encoder and Decoder

Convert URL components between readable and encoded forms.

HTML Encoder and Decoder

Encode and decode HTML entities safely for markup and debugging.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes.

SHA256 Generator

Generate SHA-256 hashes quickly for integrity checks.

HMAC Generator

Generate keyed HMAC signatures with SHA-256, SHA-384, and SHA-512.

Password Strength Checker

Evaluate password quality with practical security feedback.

Unicode Converter

Convert plain text to Unicode escape sequences and decode back instantly.

JWT Decoder

Decode JWT header and payload locally without sending data out.

JWT Encoder

Create signed HS256 JWT tokens locally from JSON payload and secret.

JWT Verifier

Verify JWT signatures for HS, RS, and ES algorithms using secret, PEM key, or JWKS.

PEM X.509 Certificate Decoder

Decode PEM and X.509 certificate details including issuer, subject, validity, SAN, and key metadata.

TLS SSL Certificate Expiry Checker

Check a public domain TLS certificate issuer, validity dates, SAN entries, and days until expiry.

Secure Compare Tool Online

Compare two values safely with optional normalization.

Password Policy Tester

Test passwords against configurable policy rules including length, case, digits, and symbols.

Password Entropy Calculator

Calculate entropy bits and strength level for passwords.

TOTP Generator

Generate time-based OTP codes from Base32 secret keys.

Webhook Signature Verifier

Verify webhook signatures using HMAC algorithms for secure integration debugging and testing.

PBKDF2 Key Generator

Derive secure keys from passwords using PBKDF2 with configurable salt, iterations, and length.

AES GCM Encrypt Decrypt

Encrypt and decrypt text locally with AES-GCM for quick private testing and validation.

CRC32 Checksum Calculator

Calculate CRC32 checksum values for text input to verify data, payloads, and file content.

JWT Timeline Inspector

Inspect JWT timeline claims like iat, nbf, and exp.

Cookie Parser

Parse Cookie header values into key-value pairs for debugging browser sessions and requests.

Set Cookie Parser

Parse Set-Cookie headers into structured attributes.

Base64 Inspector

Decode Base64 and inspect bytes, text preview, and JSON payloads.