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File Hash & Checksum Generator

Generate cryptographic checksums (SHA-256, SHA-384, SHA-512, SHA-1, MD5) and verify file integrity by comparing expected vendor hashes locally.

100% Client-Side Processing: All cryptographic hashes and checksums are computed on your device using native Web Crypto & Web Workers. Your files are never uploaded.

Drag and drop any file to compute hashes, or select from your computer

Computes SHA-256, SHA-384, SHA-512, SHA-1, and MD5 instantly

What a Matching Hash Does and Does Not Prove

A matching SHA-256 proves the file you received is bit-for-bit the file that was hashed — protecting against corrupted downloads and tampering after publication. It does not prove the file is safe: if the publisher hashed a malicious file, the checksum matches perfectly. Trust therefore flows from the channel publishing the hash, not from the hash itself. MD5 and SHA-1 remain fine for detecting accidental corruption but are broken against deliberate collision attacks; use SHA-256 whenever both options exist.

How the Tool Processes Your File

  1. Drop the file you want to hash onto the tool. It can be any type and any size the browser can read.
  2. Select the algorithm: SHA-256 (recommended), SHA-384, SHA-512, SHA-1, or MD5.
  3. The hash is computed with the browser-native SubtleCrypto API and displayed in lowercase hex.
  4. Paste the expected checksum from the software vendor into the verification field to see an instant match or mismatch.

Typical Use

Verify a downloaded ISO
Input: linux-distro.iso (3.8 GB) → SHA-256
Output: a1b2c3…9f0e (64 hex characters)
Compare this value with the one printed on the official download page. A match confirms the download is complete and untampered.
Compare two copies of a file
Input: backup.zip and backup-copy.zip → SHA-256
Output: Identical hash if the files match byte-for-byte
Any single bit of difference changes the entire hash. This is the standard way to confirm a copy operation or a sync worked.

Common Questions

What is a file hash or checksum?

A checksum is a short, fixed-length fingerprint computed from the file bytes. Changing even one bit produces a completely different hash, so matching hashes prove two files are identical.

Why choose SHA-256 over MD5?

SHA-256 is collision-resistant and is the de-facto standard for integrity verification today. MD5 is fast but cryptographically broken and only suitable for non-security checks.

Does the file leave my device?

No. Hashing runs on your processor through the browser WebCrypto API; the file content never leaves your machine.

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