Hash Generator
Generate MD5, SHA1, SHA256, SHA512 hashes
Compare Hashes
Hash Algorithms
160 bits (40 chars)
256 bits (64 chars)
384 bits (96 chars)
512 bits (128 chars)
What is Hash Generator?
The Hash Generator is a free online tool that turns any text into cryptographic hash values using the SHA family of algorithms. A hash is a fixed-length fingerprint of your input: the same text always produces the same hash, but the original cannot be recovered from it. This tool computes SHA-1, SHA-256, SHA-384, and SHA-512 simultaneously as you type, so you can copy whichever digest you need. You can show each digest as lowercase hex, UPPERCASE hex, or Base64, and switch on HMAC mode to sign your input with a secret key. A built-in verify field lets you paste any hash and instantly see which generated digest it matches, while a separate compare box checks two hashes for an exact match. Everything is computed in your browser using the native Web Crypto API, so your input and secret key never leave your device.
How to use Hash Generator?
Generating, formatting, and verifying hashes takes only a moment and happens entirely in your browser:
- 1 Type or paste the text you want to hash into the input field. The hash values are computed in real time, updating instantly with every change you make.
- 2 View all hash formats at once. The tool calculates SHA-1, SHA-256, SHA-384, and SHA-512 side by side so you can choose the algorithm your task requires.
- 3 Pick an output format — lowercase hex, UPPERCASE hex, or Base64 — to match the format your system expects, then click the copy button next to any digest, or use Copy all to grab every result at once.
- 4 Turn on HMAC mode and enter a secret key to produce keyed hashes with SHA-256, SHA-384, or SHA-512 — the standard for signing API requests and webhook payloads.
- 5 Use the verify field to paste a hash and confirm which generated digest it matches, or the Compare Hashes box to check two pasted hashes against each other.
Why use this tool?
Hashing is fundamental to modern computing, used for verifying integrity, indexing data, and detecting changes. When you download a file, comparing its SHA-256 hash against the one published by the source proves the file was not corrupted or tampered with. Developers use hashes for cache keys, deduplication, and digital signatures, and use HMAC to authenticate API requests and verify webhook signatures with a shared secret. This tool gives you the full SHA family in one place, lets you switch output between hex and Base64, and compares or verifies digests instantly. Because all computation happens locally in your browser through the Web Crypto API, sensitive input and secret keys are never uploaded to a server. It is fast, free, requires no signup, and is ideal whenever you need a quick, reliable fingerprint of some data.
Examples
Hash a downloaded file's contents and compare the resulting SHA-256 value against the checksum published on the official site to confirm the file is intact.
Switch on HMAC mode, enter your shared secret, and generate an HMAC-SHA-256 signature over a request body to authenticate it exactly as your server expects.
Paste a published checksum into the verify field to instantly see which algorithm it matches, or use Base64 output to match a digest stored in that encoding.
Frequently Asked Questions
Is the Hash Generator free to use?
Yes. The tool is completely free, with no signup, no limits, and no account required. You can generate, format, and verify as many hashes as you like.
Is my input sent to a server?
No. All hashing is computed entirely in your browser using the Web Crypto API, so your input text and secret key are never uploaded or stored anywhere. The tool is safe for sensitive data.
What is HMAC mode for?
HMAC produces a keyed hash that combines your input with a secret key, which is the standard way to sign API requests and verify webhook payloads. It is available with SHA-256, SHA-384, and SHA-512.
Which algorithm should I use?
SHA-256 is recommended for most security-related uses, and SHA-384 or SHA-512 when you want a longer digest. SHA-1 is fast and fine for non-security checksums but is considered weak and should not be relied on for security.
Why do the same words sometimes give different hashes?
Hashes are sensitive to every character, including spaces, capitalization, and line breaks. Even a tiny difference in the input — or a different output format such as Base64 versus hex — produces a different-looking value.
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