Algorithm
Hash appears here
MD5 Hash Generator
Free online SHA hash generator. Generate SHA-1, SHA-256, and SHA-512 cryptographic hashes instantly. Uses the browser's native Web Crypto API.
Free
No login
100% browser-based
No data sent to servers
Try these next
What is a MD5 Hash Generator?
SHA (Secure Hash Algorithm) is a family of cryptographic hash functions standardised by NIST. A hash function takes any input and produces a fixed-length output (digest) that is deterministic, fast to compute, and practically impossible to reverse. SHA-256 produces a 256-bit (64 hex character) digest and is the backbone of TLS certificates, Bitcoin, and code-signing pipelines worldwide.
This tool generates SHA-1, SHA-256, and SHA-512 digests using the browser's native SubtleCrypto API. No data leaves your machine. Use it to verify file integrity, checksum API payloads, or explore how hashing works.
Can I reverse a SHA hash?
No. SHA is a one-way function — it's mathematically infeasible to reverse. This is by design for security. What attackers use instead are rainbow tables: precomputed databases of common password hashes.
Which SHA should I use — SHA-1, SHA-256, or SHA-512?
SHA-1 is deprecated for security use due to collision vulnerabilities. SHA-256 is the current standard — use it for checksums, signatures, and password hashing (with salt). SHA-512 is stronger but rarely necessary.
Is this hash generator private?
Yes. Hashing uses the browser's native Web Crypto API. Your input text never leaves your device.
What is the difference between SHA-1, SHA-256, and SHA-512?
SHA-1 produces a 160-bit (40 hex) hash and is cryptographically broken — do not use for security. SHA-256 produces a 256-bit (64 hex) hash and is the current standard for most security applications. SHA-512 produces a 512-bit (128 hex) hash — stronger but slower, used when extra security margin is needed. For new applications always use SHA-256 or SHA-512.
Can I reverse a SHA hash back to the original text?
No. SHA is a one-way hash function — it is computationally infeasible to reverse. However, short or common inputs (like "password123") can be looked up in rainbow tables. This is why passwords should be hashed with bcrypt, scrypt, or Argon2 (which add salt and are slow by design), not raw SHA.
What is SHA hashing used for?
File integrity verification (checksums), digital signatures, certificate fingerprints, Git commit IDs, API request signing (HMAC-SHA256), and storing non-sensitive identifiers. Do NOT use raw SHA for password storage — use bcrypt or Argon2 instead.
What is the difference between SHA and MD5?
MD5 produces a 128-bit hash and has known collision vulnerabilities — two different inputs can produce the same hash. SHA-256 has no known collisions and is significantly more secure. MD5 is still used for non-security checksums (e.g. file download verification) where speed matters and collision resistance is not critical.