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Calculate file SHA hash values, verify integrity and security, support SHA-1/256/512 algorithms
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Max 100 MB
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SHA Hash Calculator
Online hash generator and verification tool supporting SHA1, SHA256, and SHA512 algorithms, featuring advanced salting and multi-round iteration options.
HMAC-SHA Calculator
Securely calculate message authentication codes (MAC). Supports SHA256, SHA512, and other algorithms to verify data integrity and sender identity.
SHAKE Hash Generator
Variable-length hash generator for SHAKE-128/256, featuring salt support, multiple iterations, and various input/output formats.
Keccak Hash Calculator
Online hash tool supporting Keccak-224, 256, 384, and 512 algorithms. Features custom salt, iterations, and multiple input/output formats.
SHA Hash Calculator
Online hash generator and verification tool supporting SHA1, SHA256, and SHA512 algorithms, featuring advanced salting and multi-round iteration options.
HMAC-SHA Calculator
Securely calculate message authentication codes (MAC). Supports SHA256, SHA512, and other algorithms to verify data integrity and sender identity.
SHAKE Hash Generator
Variable-length hash generator for SHAKE-128/256, featuring salt support, multiple iterations, and various input/output formats.
Keccak Hash Calculator
Online hash tool supporting Keccak-224, 256, 384, and 512 algorithms. Features custom salt, iterations, and multiple input/output formats.
Bulk SHA Hash Generator
Bulk generate SHA-1, SHA-256, and SHA-512 hashes. Supports HEX/Base64 formats and case conversion for data validation and digital signatures.
When downloading important files, how can you confirm they haven't been tampered with? File SHA checksum verification allows you to easily verify file integrity and authenticity by calculating a unique digital fingerprint (hash value) for your files. SHA (Secure Hash Algorithm) is a set of cryptographic hash functions that convert files of any size into fixed-length strings (SHA-1 produces 40 characters, SHA-256 produces 64 characters, SHA-512 produces 128 characters). Even if a file changes by just 1 bit, the hash value will be completely different.
What's the difference between SHA-1 and SHA-256?
SHA-1 generates 160-bit hashes (40 characters) and has known collision vulnerabilities; SHA-256 generates 256-bit hashes (64 characters) and is currently more secure.
Why doesn't my calculated hash value match the official website's?
First, confirm that the algorithms are the same (e.g., both using SHA-256), second, check if the file was completely downloaded, and finally confirm that the official website's hash value comes from a trusted source.
For sensitive files, it's recommended to use local verification tools; large files (over 2GB) may fail due to browser memory limitations; if verification results don't match, please re-download the file and confirm the algorithm selection is correct.
When releasing software, it's recommended to provide both SHA-256 and SHA-512 hash values simultaneously. Typical verification scenario: after downloading a Linux image file, run sha256sum filename.iso to compare with the value provided on the official website. Note that Windows line endings (CRLF) and Linux line endings (LF) will result in different hash values.