Skip to main content
FreeFormatHub
🔒

File Hash Integrity Checker

Generate, verify, and compare file hashes for integrity checking using multiple cryptographic algorithms.

Quick Examples

Hash Algorithms

MD5⚠️
8 chars
Fast but cryptographically broken
SHA-1⚠️
10 chars
Legacy hash, avoid for security
SHA-256⭐
16 chars
Secure and widely used
SHA-384
24 chars
SHA-2 family, 384-bit
SHA-512⭐
32 chars
SHA-2 family, 512-bit
SHA3-256⭐
16 chars
SHA-3 family, modern
BLAKE2b⭐
32 chars
Fast and secure modern hash
xxHash
4 chars
Extremely fast, non-cryptographic
Selected: 1 algorithm

Checksum Formats

Standard
{hash} {filename}
Extension: .sum
BSD Style
{algorithm} ({filename}) = {hash}
Extension: .bsd
GNU Style
{hash} {filename}
Extension: .gnu
SFV
{filename} {hash}
Extension: .sfv
MD5SUM
{hash} {filename}
Extension: .md5
SHA256SUM
{hash} {filename}
Extension: .sha256

Security Tips

Deprecated Algorithms
Avoid MD5 and SHA-1 for security-critical applications
Recommended
Use SHA-256, SHA-512, or BLAKE2b for new projects
Performance
BLAKE2b is fastest, SHA-256 is widely supported

Data to Hash

Syntax: text

Output

Output will appear here

How It Works

Input Your Data

Paste, type, or upload your data directly into the file hash integrity checker. All processing happens locally in your browser for complete privacy and security.

Configure Options

Customize the tool settings to match your specific needs. Real-time processing with instant validation and error detection.

Process Instantly

Click the process button or enable auto-processing for real-time results. Lightning-fast performance with immediate feedback and validation.

Export Results

Copy results to clipboard, download as files, or share with others. Multiple export formats available for maximum compatibility.

Frequently Asked Questions

Which hash algorithm should I use?
SHA-256 is recommended for security-critical applications. SHA-512 offers higher security. Avoid MD5 and SHA-1 for security purposes. Use BLAKE2b for performance-critical applications.
What checksum file formats are supported?
Supports standard formats including GNU-style (hash filename), BSD-style (ALGORITHM (filename) = hash), SFV, and MD5SUM/SHA256SUM formats.
How accurate is the hash verification?
Hash verification is cryptographically secure. A matching hash provides extremely high confidence (99.999...%) that data is identical, while mismatches definitively indicate changes.
Can I verify multiple files at once?
Yes, use batch mode with checksum files. The tool parses standard checksum file formats and can verify multiple entries simultaneously.
What happens if I use a deprecated algorithm?
The tool warns about deprecated algorithms (MD5, SHA-1) but still processes them for compatibility. Use modern algorithms like SHA-256 for new applications.

Related Tools