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🔐 Security · 9 Tools

Security & Encoding Tools

Free tools for hashing, encoding, JWT, password generation, and UUIDs

Security and encoding utilities are among the most frequently needed — and hardest to find as clean, trustworthy, browser-based tools. Whether you're hashing a string to verify data integrity, decoding a JWT token to debug an authentication issue, encoding an image as Base64 for an email template, or generating a cryptographically secure password, you need tools you can trust with sensitive data.

MODOO HUB's 9 security and encoding tools run entirely in your browser. The Hash Generator supports MD5, SHA-1, SHA-256, SHA-384, and SHA-512. The JWT Decoder shows the full header and payload without any server round-trip. The Password Generator uses the Web Crypto API's getRandomValues() for true cryptographic randomness — not the predictable Math.random().

Nothing you input is ever transmitted. These tools are safe to use with real API tokens, secrets, and sensitive strings.

All 26 Security & Encoding Tools
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Password Generator
Cryptographically secure random passwords
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Hash Generator
MD5, SHA-1, SHA-256, SHA-512 hashing
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JWT Decoder
Decode and verify JWT tokens client-side
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JWT Generator
Create signed JWT tokens with custom claims
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HTML Encoder / Decoder
Escape and unescape HTML entities
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Base64 Image Converter
Convert images to/from Base64 data URIs
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UUID Generator
Generate UUID v4 identifiers in bulk
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Random String Generator
Custom length random strings with any charset
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Base64 Encoder
Encode text or files to Base64 online. Supports standard and URL-safe modes.
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Base64 Decoder
Decode Base64 (standard or URL-safe) back to text. Free online tool with auto-de…
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URL Encoder
텍스트와 URL을 퍼센트 인코딩(URL 인코딩)으로 변환합니다. encodeURIComponent와 encodeURI 두 가지 모드를 지원합니다…
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URL Decoder
퍼센트 인코딩된 URL을 원래 텍스트로 변환합니다. decodeURIComponent, decodeURI, 자동 감지 모드를 지원합니다.
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HTML Entity Decoder
HTML 엔티티(&amp;, &lt;, &gt;, &quot; 등)를 원래 텍스트로 디코딩합니다. 숫자 엔티티, 유…
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HTTP Header Checker
HTTP 응답 헤더 분석, 보안 헤더 누락 확인, 최적화 가이드.
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SSL Certificate Checker
도메인 SSL 인증서 유효성, 만료일, 발급자, SAN 도메인을 무료로 확인하세요.
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SSL Certificate Decoder
SSL/TLS 인증서 PEM을 붙여넣어 디코딩하세요. 인증서 유형, 길이, HEX 미리보기, OpenSSL 명령어 참조.
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CSR Generator
CSR 필드 입력 후 OpenSSL 명령어 즉시 생성. SSL 인증서 발급 준비 가이드.
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CSP Generator
CSP 지시어 설정 후 헤더 값·메타 태그·서버 설정 즉시 복사.
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CSP Validator
CSP 헤더를 파싱해 지시어 분석, 위험 키워드 경고, 누락 항목 진단.
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CORS Header Checker
CORS 응답 헤더 분석, Access-Control-* 값 검사, 교차 출처 요청 성공 여부 즉시 확인.
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Hash Checker
텍스트의 SHA-256, SHA-384, SHA-512, SHA-1 해시 생성 및 해시 비교 검증. 온라인 Hash Checker.
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bcrypt Generator
비밀번호를 bcrypt 해시로 변환. Cost factor 설정. 온라인 Bcrypt Password Hash Generator.
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bcrypt Validator
비밀번호와 bcrypt 해시를 비교해 일치 여부 확인. 온라인 Bcrypt Password Validator.
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HMAC
HMAC Generator
HMAC-SHA256, HMAC-SHA384, HMAC-SHA512 서명 생성. 키·메시지 입력 → HEX/Base64 출력. 온라인 HMAC …
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RSA
RSA Key Generator
RSA 2048/4096비트 공개키·개인키 쌍 생성기. PEM 형식 출력. 브라우저 Web Crypto API 사용. 온라인 RSA Key Ge…
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SSH
SSH Key Generator
ssh-keygen 명령어 생성기. Ed25519, RSA 2048/4096비트 SSH 키 생성 가이드 및 명령어 자동 생성. 온라인 SSH K…
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Frequently Asked Questions
What hashing algorithms does the Hash Generator support?▼
The Hash Generator supports MD5, SHA-1, SHA-256, SHA-384, and SHA-512. Use SHA-256 or higher for security-sensitive applications — MD5 and SHA-1 are considered cryptographically weak.
Can I use the JWT Decoder to verify a token's signature?▼
The JWT Decoder decodes the header and payload client-side and can validate the HMAC signature if you provide the secret key. It supports HS256, HS384, and HS512 signed tokens.
Are the passwords generated here truly random?▼
Yes. The Password Generator uses the browser's built-in crypto.getRandomValues() API, which produces cryptographically secure random values — not predictable pseudo-random numbers from Math.random().
What is Base64 encoding used for?▼
Base64 is used to safely transmit binary data (like images or files) over text-based protocols. It's commonly used in data URIs, email attachments, and HTTP Authorization headers.
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