No! All hashing happens in your browser using the Web Crypto API. Your file never leaves your device.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Is Free File Checksum Calculator free?

Yes. Free File Checksum Calculator on TheToolss is free to use with no signup required for the core workflow.

Do I need an account?

No. You can run the tool and copy or download results without creating an account.

File Checksum Calculator

Calculate MD5, SHA-1, SHA-256, and SHA-512 checksums for any file to verify integrity.

100% free
Private in browser
No signup
No watermarks

🔐

Drop a file here or click to select

Any file type, any size

Rate this tool

Be the first to rate — helps others and improves this page.

About File Checksum Calculator

File Checksum Calculator generates MD5, SHA-1, SHA-256, and SHA-512 hashes for any file. Drag & drop or select a file to verify its integrity.

How to use File Checksum Calculator

Drag & drop or select a file.
Wait for hash calculation.
Copy any checksum value.

Key features

MD5, SHA-1, SHA-256, SHA-512
Works in browser using Web Crypto API
Supports any file type and size
Drag & drop support
One-click copy

Frequently asked questions

Is my file uploaded?: No! All hashing happens in your browser using the Web Crypto API. Your file never leaves your device.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.
Is Free File Checksum Calculator free?: Yes. Free File Checksum Calculator on TheToolss is free to use with no signup required for the core workflow.
Do I need an account?: No. You can run the tool and copy or download results without creating an account.

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