Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files — instantly, privately, entirely in your browser.
SHA-384, SHA-512 hidden — click the pill above to enable.
Free Online Hash Generator — MD5, SHA-256, SHA-512 and More
A hash generator converts any text or file into a fixed-length fingerprint called a digest. Whether you need to verify the integrity of a downloaded file, generate a checksum for a software release, fingerprint a document, or prototype an API that uses HMAC signatures — this free tool handles it all without sending your data anywhere.
QuickToolkit's hash generator supports the five most widely-used algorithms: MD5 (128-bit, fast legacy checksums), SHA-1 (160-bit, still used in Git), SHA-256 (256-bit, the modern default), SHA-384, and SHA-512 (extra security margin for high-value data). All computation runs inside your browser using the native Web Crypto API and a pure-JS MD5 implementation — your text and files never leave your device.
Beyond plain hashing, the tool offers HMAC generation (authenticate messages with a shared secret), a file hasher that handles files of any size with a progress indicator, and a hash comparison utility to instantly verify whether two digests match.
How to Use the Hash Generator
- 1
Hash text — the Text Hash tab
Paste or type any string into the text area. Hashes for all enabled algorithms appear instantly as you type. Use the algorithm pills (MD5, SHA-1, SHA-256, etc.) to show or hide specific results. Click "Copy" next to any hash, or "Copy all hashes" to get them all at once.
- 2
Hash a file — the File Hash tab
Click to select any local file. The tool reads and hashes it in 2 MB chunks so even large files (ISOs, ZIP archives, videos) work without freezing the browser. A progress bar tracks the computation. All five algorithms are shown simultaneously.
- 3
Generate an HMAC — the HMAC tab
Enter a message and a secret key, choose HMAC-SHA256 (or another variant), and click "Generate HMAC". The output is the Base16 (hex) MAC — the same format used by AWS Signature V4, Stripe webhooks, and most JWT libraries.
- 4
Verify a checksum — the Compare tab
Paste the expected hash from the vendor's website in field A, and the hash you computed in field B. The tool instantly tells you whether they match — confirming your download is authentic and unmodified.
Hash Algorithm Comparison
| Algorithm | Output bits | Hex chars | Speed | Security status | Common use |
|---|---|---|---|---|---|
| MD5 | 128 | 32 | Very fast | Broken (collision attacks) | Legacy checksums, non-security fingerprints, Git pack objects |
| SHA-1 | 160 | 40 | Fast | Deprecated (SHAttered attack) | Git commit IDs, legacy TLS/SSH, older code signing |
| SHA-256 | 256 | 64 | Fast | Secure | File checksums, TLS certificates, Bitcoin, code signing |
| SHA-384 | 384 | 96 | Fast | Secure | TLS 1.3 cipher suites, government/compliance environments |
| SHA-512 | 512 | 128 | Fast* | Secure (highest margin) | High-security signing, long-term archival, HMAC keys |
* SHA-512 is often faster than SHA-256 on 64-bit processors due to 64-bit word operations.
Why Use This Hash Generator?
Five algorithms in one
MD5, SHA-1, SHA-256, SHA-384, and SHA-512 all available with a single text input — no switching between tools.
File hashing with progress
Hash files of any size in-browser. A progress bar shows completion. No upload required.
HMAC generation
Compute HMAC-SHA1/256/384/512 with a custom secret key — ready for API authentication and webhook verification.
Hash comparison utility
Paste two hashes to instantly verify whether they match. Case-insensitive and whitespace-tolerant.
Real-time as you type
Text hashes update live on every keystroke — no button needed. Powered by the native Web Crypto API.
One-click copy
Copy individual hashes or all hashes at once with a single button click.
100% private & offline-ready
No data ever leaves your browser. Works fully offline once the page has loaded.
Mobile-friendly
Responsive design works on any device — phone, tablet, or desktop.
Common Use Cases
Verifying software downloads
Compare the SHA-256 shown on a download page against the hash you compute here to confirm the file was not tampered with.
Generating file checksums
Attach a SHA-256 or MD5 checksum to files you distribute so recipients can verify integrity.
Prototyping API signatures
Test HMAC-SHA256 signatures for webhook validation (Stripe, GitHub, Shopify) before writing code.
Password hashing research
Understand what hashing does by hashing example strings — and see why MD5 is inadequate for password storage.
Data deduplication
Hash file contents to detect exact duplicates in a dataset — identical hashes mean identical content.
Content addressing
Generate a stable, unique identifier for a piece of text or document without relying on filenames or timestamps.
Frequently Asked Questions
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