QikDrive

File Checksum Calculator

Verify file integrity with SHA-1, SHA-256, SHA-384, and SHA-512 checksums. Runs entirely in your browser, no files are uploaded anywhere.

Drop any file here, or click to select

Any file type · Processed locally · No uploads

Free File Checksum & Hash Verifier

Drop any file to instantly compute SHA-1, SHA-256, SHA-384, and SHA-512 checksums. Paste an expected hash to verify your download is authentic. Everything runs locally, no files leave your browser.

Four algorithms at once

Compute SHA-1, SHA-256, SHA-384, and SHA-512 simultaneously with a single file drop, no need to repeat the process for each algorithm.

Web Crypto API accuracy

Uses the browser's built-in Web Crypto API, the same cryptographic engine used by TLS and password managers, for mathematically correct results.

Instant hash verification

Paste an expected checksum into the verify field and instantly see whether it matches any of the computed hashes, perfect for validating downloads.

No file uploads, ever

The file is read directly by your browser. Nothing is sent to a server. Your sensitive files stay on your device.

Any file, any size

Works with executables, disk images, archives, documents, any file type or size supported by your browser.

One-click copy

Copy any individual hash to your clipboard with a single click for easy comparison with published checksums.

Frequently asked questions

What is a file checksum?
A checksum is a fixed-length string produced by a cryptographic hash function like SHA-256. Even a tiny change to the file produces a completely different hash, making them ideal for verifying a download is authentic and unmodified.
Is my file uploaded to your servers?
No. The checksum is computed entirely inside your browser using the Web Crypto API. The file never leaves your device.
Which algorithm should I use?
SHA-256 is the most widely used for file verification today and is recommended for most purposes. SHA-512 offers a higher security margin. SHA-1 is considered weak for security applications but is still published by some legacy software.
How do I verify a downloaded file?
Drop the file into the calculator, then paste the expected checksum (usually listed on the download page) into the "Verify against known hash" field. A green "Hash verified" message confirms the file is authentic.
Why is SHA-1 included if it is weak?
Some older software still publishes SHA-1 checksums for legacy compatibility. While not recommended for new security-critical uses, it remains useful for checking accidental corruption in non-security contexts.
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