Hash Generator — SHA-256 and File Checksums

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Drag & drop a file here, or click to browse

Any file type supported. All processing happens locally.

Multiple Algorithms

Supports MD5, SHA-1, SHA-256, and SHA-512. Calculate multiple hashes at once.

File Hashing

Drag and drop any file to compute its checksum and verify download integrity.

Hash Comparison

Paste a known hash to instantly verify if your data matches — no manual comparison needed.

100% Private

All computation happens locally in your browser. No data is ever uploaded to any server.

High Performance

Leverages the native Web Crypto API for blazing-fast hashing, even for large files.

Completely Free

No registration, no limits, no ads. Free to use forever.

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Frequently Asked Questions

What is a hash?
A hash function converts any input data into a fixed-length digest. The same input always produces the same output, but you cannot reverse the output to recover the original input.
Is my data uploaded anywhere?
No. All hash computations happen entirely in your browser. Your text and files never leave your device, ensuring complete privacy.
What's the difference between MD5 and SHA-256?
MD5 produces a 128-bit (32-character) hash and is fast but has known collision vulnerabilities — not recommended for security purposes. SHA-256 produces a 256-bit (64-character) hash with much stronger security, and is the most widely used hash algorithm today.
How large of a file can I hash?
It depends on your browser and device memory. Most modern browsers can handle files of several hundred MB or even a few GB. The tool reads files in chunks to conserve memory.
Can a hash be decrypted?
No. Hashing is a one-way function — by design, you cannot recover the original data from a hash value. This is fundamentally different from encryption, which can be reversed with a key.
How do I generate a SHA-256 hash from text?

Choose SHA-256 and enter your text to produce its digest. Whitespace and line endings are part of the input, so different text produces a different result.

How do I compare a file hash with a published checksum?

Choose the same algorithm as the published checksum, select your file and compare the complete digest. Use the algorithm specified by the checksum source; MD5 and SHA-256 produce different digests.