Security & Encoding
Security Tools Browser Only

Free SHA Hash Generator Online

Generate SHA-1, SHA-256, and SHA-512 hashes from text or files

Hashing runs using the browser's Web Crypto API. No data leaves your device.

Web Crypto API

Uses the browser's native crypto.subtle.digest — no external libraries.

Three Algorithms

SHA-1 (legacy), SHA-256 (standard), SHA-512 (high security).

Files & Text

Hash text strings or compute checksums for entire files locally.

How to Use

  1. 1

    Select hash algorithm

    Choose SHA-1, SHA-256, or SHA-512 depending on your need.

  2. 2

    Choose input type

    Select "Text" to hash a string, or "File" to compute the checksum of a file.

  3. 3

    Enter your data

    Type text or upload a file. The hash is calculated immediately in your browser.

  4. 4

    Copy the hash

    Click the copy button to copy the hex-encoded hash string.

Frequently Asked Questions

Is the SHA hash generator free?+
Yes, completely free with no sign-up. It uses the browser's built-in Web Crypto API, so no library needs to be loaded from a CDN.
What is the difference between SHA-1, SHA-256, and SHA-512?+
SHA-1 produces a 160-bit (40 hex char) hash — deprecated for security use. SHA-256 produces a 256-bit (64 hex char) hash and is the current standard. SHA-512 produces a 512-bit (128 hex char) hash for higher security requirements.
Can SHA-256 be reversed?+
No. SHA-256 is a one-way function — it is computationally infeasible to reverse a hash to recover the original input. This is what makes it useful for integrity verification.

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