Hash 생성기
SHA-1, SHA-256, SHA-384, SHA-512 Hash를 생성합니다
알고리즘 상세 정보
SHA-1: 160비트 Hash, 레거시 용도 전용 (충돌 저항성 없음)
SHA-256: 256비트 Hash, 무결성 검사 및 블록체인에 널리 사용
SHA-384: 384비트 Hash, SHA-512의 축소 버전
SHA-512: 512비트 Hash, 가장 강력한 SHA-2 변형
사용 방법
텍스트 붙여넣기 또는 입력
입력 영역에 텍스트, 코드 또는 데이터를 입력하세요.
옵션 선택
적용할 변환이나 포맷을 선택하세요.
결과 복사
한 번의 클릭으로 출력을 클립보드에 복사하세요.
이 도구를 사용하는 이유
100% 무료
숨겨진 비용도, 프리미엄 등급도 없습니다 — 모든 기능이 무료입니다.
설치 불필요
브라우저에서 완전히 실행됩니다. 소프트웨어를 다운로드하거나 설치할 필요가 없습니다.
프라이빗 & 안전
데이터가 기기 밖으로 나가지 않습니다. 어떤 서버에도 업로드되지 않습니다.
모바일 지원
완전 반응형 — 스마트폰, 태블릿, 데스크톱에서 사용할 수 있습니다.
Cryptographic Hash Functions: MD5, SHA-1, SHA-256, and Beyond
Key Takeaways
- Hash functions produce fixed-length fingerprints of data, enabling integrity verification, password storage, and digital signatures.
- MD5 and SHA-1 are considered broken for security purposes — use SHA-256 or SHA-3 for any security-sensitive application.
- All hash computation happens in your browser using the Web Crypto API — your data never leaves your device.
Cryptographic hash functions are one-way transformations that convert any input into a fixed-size output (the hash or digest). They are fundamental to modern computing — from verifying file integrity and storing passwords to powering blockchain technology. Understanding which algorithm to use and when is critical for building secure applications.
SHA-256 produces a 256-bit hash — the probability of two different inputs producing the same hash is roughly 1 in 10^77.
Collision Resistance
Key Concepts
One-Way Property
Hash functions are designed to be computationally infeasible to reverse. Given a hash output, you cannot determine the original input. This property makes them ideal for password storage.
Collision Resistance
A strong hash function makes it extremely difficult to find two different inputs that produce the same hash. MD5 and SHA-1 have known collision attacks, which is why SHA-256 is now the standard.
Avalanche Effect
Changing even a single bit of input produces a completely different hash output. This property ensures that similar inputs cannot be detected by comparing their hashes.
Algorithm Comparison
MD5 (128-bit) is fast but broken. SHA-1 (160-bit) is deprecated. SHA-256 (256-bit) is the current standard. SHA-3 (variable) offers an alternative design. Choose based on your security requirements.
Pro Tips
Never use plain hashes for password storage — use bcrypt, scrypt, or Argon2 which add salt and computational cost.
Use SHA-256 file hashes to verify download integrity — compare with the hash published by the software vendor.
MD5 is still acceptable for non-security uses like cache keys, deduplication checks, and checksums where collision attacks are not a concern.
The Web Crypto API (SubtleCrypto.digest) provides hardware-accelerated hashing in modern browsers — much faster than JavaScript implementations.
All hash generation is performed entirely in your browser using the Web Crypto API. Your input data is never transmitted to any server, making this tool safe for hashing sensitive content.