File Hash Generator
Generate SHA-1, SHA-256 and SHA-512 checksums for any file. Verify file integrity. File stays in browser.
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File Integrity Verification: Trust but Verify
When you download software, security tools or large files from the internet, a single bit flip during transmission can corrupt the file — or malicious actors can replace the file with malware. File hashing (also called checksums) creates a unique fingerprint of a file — if any part of the file changes, the hash changes completely. Our tool generates SHA-1, SHA-256 and SHA-512 hashes and lets you verify against a known hash — instantly confirming your download is intact and unmodified.
Frequently Asked Questions
How to verify a downloaded file hash on Windows? ▼
Windows PowerShell: Get-FileHash C:\Downloads\file.exe -Algorithm SHA256. Windows Command Prompt: certutil -hashfile C:\Downloads\file.exe SHA256. Compare the output with the hash published on the download page. If they match, the file is intact.
How to check file hash on Mac or Linux? ▼
Mac Terminal: shasum -a 256 filename (SHA-256), shasum -a 1 filename (SHA-1). Linux: sha256sum filename (SHA-256), md5sum filename (MD5). Compare the hash string with what the publisher lists. Our browser-based tool works on any OS without using the terminal.
What hash algorithm should I use for file verification? ▼
For file integrity: SHA-256 is the current standard (used by most Linux distributions and software publishers). SHA-512 offers slightly stronger security but SHA-256 is sufficient for all practical purposes. Avoid MD5 and SHA-1 for security purposes — both have known collision vulnerabilities. For passwords: use bcrypt, scrypt or Argon2 (not SHA-256).
Can two different files have the same hash? ▼
Theoretically yes (called a "collision") but practically impossible for SHA-256. The probability of finding a SHA-256 collision by accident is 1 in 2¹²⁸ — smaller than the number of atoms in the observable universe. Deliberate collisions are extremely difficult — no practical SHA-256 collision has ever been found.
What is the difference between checksum and hash? ▼
Checksum is a simpler error-detection value (like CRC32) designed to catch accidental corruption — NOT secure against tampering. Hash (SHA-256, SHA-512) is a cryptographic function designed to be collision-resistant and tamper-evident. Use hashes (SHA-256) for security verification; checksums for quick error detection only.