A hash is a fixed-length string generated from input data using a mathematical function. The same input always produces the same hash, but it's practically impossible to reverse.

Which hash algorithm should I use?

For security purposes, use SHA-256 or SHA-512. MD5 and SHA-1 are considered weak for security but still useful for checksums and non-security purposes.

Yes! All hashing is done entirely in your browser using the Web Crypto API. Your data never leaves your device.

Can I reverse a hash back to the original text?

No. Hash functions are one-way, so there is no mathematical way to turn a digest back into its input. Tools that appear to 'crack' a hash simply guess inputs and compare their hashes until one matches.

What is a hash collision?

A collision happens when two different inputs produce the same hash value. Practical collisions have been demonstrated for MD5 and SHA-1, which is why they are no longer safe for security, while SHA-256 and SHA-512 remain collision-resistant.

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Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes online

Your files never leave your browser

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Input Text

SHA-1

Hash will appear here...

SHA-256

Hash will appear here...

SHA-512

Hash will appear here...

What is the Hash Generator?

Written and maintained by the BitConvert team · Feb 27, 2026

The Hash Generator computes cryptographic digests of any text you enter using four widely used algorithms: MD5, SHA-1, SHA-256, and SHA-512. A hash function maps input of any length to a fixed-size fingerprint -- 128 bits for MD5, 160 for SHA-1, and 256 or 512 bits for the SHA-2 family -- and the same input always yields the same output, while even a one-character change produces a completely different result.

Results for every algorithm are shown together so you can copy whichever one you need. The hashing is performed locally with the browser's Web Crypto API, so your input never leaves the page. Note that MD5 and SHA-1 are broken for security-critical uses because practical collisions exist; they remain fine for non-security checksums, but SHA-256 or SHA-512 should be used whenever integrity or authentication actually matters.

Key Features

Four Algorithms

Generate MD5, SHA-1, SHA-256, and SHA-512 digests side by side so you can pick the right one for the job.

Live Computation

Hashes recalculate as you type, giving immediate feedback without pressing a button or reloading.

Local Hashing

All digests are produced in the browser via the Web Crypto API, so input text is never sent to a server.

Per-Algorithm Copy

Copy any individual hash value to the clipboard with one click for pasting into scripts or verification checks.

Common Use Cases

Confirm a downloaded ISO or installer is intact by comparing its SHA-256 checksum against the value the publisher listed. Generate sample hashes while building or testing a login or data-integrity feature. Create a stable fingerprint of a string to use as a cache key or to detect whether content has changed. Quickly reproduce a legacy MD5 or SHA-1 digest when working with older systems that still rely on those algorithms for non-security checks.

How It Works

Enter Text

Type or paste the text you want to hash

Select Algorithm

Choose from MD5, SHA-1, SHA-256, or SHA-512

Get Hash

The hash is generated instantly - copy it with one click

Frequently Asked Questions

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Last updated: Feb 27, 2026