Hashing Engine
Generate message digests using various algorithms.
SHA-256 OutputStrong
...
Hashing Comparison
What is Salting?
Salting adds random data to the input before hashing, making it impossible to use pre-computed "Rainbow Tables" to crack hashes.
Collision Resistance
A good hash function should never produce the same hash for two different inputs. SHA-256 is highly collision-resistant.
⚠️ MD5 and SHA-1 are considered cryptographically broken and should not be used for sensitive data like passwords. They are still useful for non-sensitive checksums/ETags.
Hashing Guide Guide
How to Use
- 1Select your desired algorithm (e.g., SHA-256, SHA-512) from the algorithm selector.
- 2Paste your input text into the 'Input Data' text area.
- 3Optionally, check 'Use HMAC' and provide a secret key for keyed hashing.
- 4The hash result will instantly appear in the results section. Use the copy button to copy it.
Formula & Logic
A cryptographic hash function takes an arbitrary amount of data and returns a fixed-size string of bytes. It is a one-way function—computationally impossible to reverse.
Practical Applications
Data Integrity
Generate a hash of a file or message and compare it later to ensure it hasn't been modified.
Digital Signatures
Hash a message and then encrypt it with your private key to create a secure signature.
Blockchain & Cryptocurrencies
Bitcoin and many other distributed ledgers use SHA-256 to secure blocks and transactions.
Frequently Asked Questions
Q.Is MD5 secure?
No, MD5 is cryptographically 'broken' due to collision vulnerabilities. It should only be used for non-sensitive tasks like file checksums, never for passwords.
Q.What is SHA-256?
SHA-256 is part of the SHA-2 set of cryptographic hash functions designed by the NSA. It is widely used in modern security protocols like SSL/TLS and HTTPS.
Q.What is an HMAC?
HMAC stands for Hash-based Message Authentication Code. It combines a cryptographic hash function with a secret key to provide both data integrity and authentication.