lockDev Tool

Hash Generator

Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser. Nothing leaves your device.

text_fieldsInput Text
Output:
attach_fileSelect or Drop a File
upload_file

Drop a file here or click to browse

Any file type · No size limit (all processing is local)

verifiedVerify a Hash

Paste text or select a file, enter the expected hash, and this tool will tell you if they match.

attach_file

Or drop / select a file

keyExpected Hash (any algorithm)
check_circle

Frequently Asked Questions

A cryptographic hash function takes input of any length and produces a fixed-length output (digest). The same input always produces the same hash, but even a tiny change produces a completely different one. Hashes are one-way — you cannot recover the original input from the hash alone.
SHA-256 produces a 256-bit (32-byte) digest shown as 64 hex characters. SHA-512 produces a 512-bit (64-byte) digest shown as 128 hex characters. SHA-512 provides a larger security margin but is slower and produces longer output. For most applications, SHA-256 is the standard choice.
SHA-1 is no longer considered cryptographically secure — practical collision attacks have been demonstrated. Do not use it for digital signatures, certificates, or security-critical applications. For non-security checksums (e.g., detecting file corruption rather than tampering), it may still be acceptable.
Yes. Go to the Verify tab, select the downloaded file, and paste the expected hash (from the software developer's website). This tool will compute the hash locally and tell you immediately if the file is authentic and unmodified.
No. All hashing is performed locally using the browser's built-in Web Crypto API (crypto.subtle). No text or file content ever leaves your device. The Web Crypto API is built into all modern browsers and is the same technology used by secure websites.

Hash Generator — Overview

The Hash Generator computes cryptographic hash values from text input or file uploads using industry-standard algorithms including MD5, SHA-1, SHA-256, SHA-384, and SHA-512. A cryptographic hash function takes any input of arbitrary length and produces a fixed-length output (the "digest") that acts as a fingerprint for that data. Even a single character change produces a completely different hash — a property known as the avalanche effect. Hashes are widely used to verify file integrity (confirming a download hasn't been corrupted or tampered with), store passwords securely in databases, create digital signatures, and generate checksums for data comparison. All hashing in this tool occurs entirely within your browser using the Web Crypto API, so your text or files are never transmitted to any server, making it safe for sensitive inputs.

Common Use Cases

How to Use This Tool

Type or paste text into the input field, or drag and drop a file onto the upload area. Select the desired hash algorithm from the dropdown — MD5, SHA-1, SHA-256, SHA-384, or SHA-512. The hash digest is computed instantly and displayed in the output field, ready to copy with one click.

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