Online Hash Generator & Checksum Verifier

Q: Which hashing algorithm should I use?

SHA-256 is the most widely used and a safe default. SHA3-256 is the newest NIST standard. BLAKE3 is very fast. xxHash variants (XXH3, XXH128) are extremely fast non-cryptographic hashes ideal for checksums. SM3 is the Chinese national standard. MD5 and SHA-1 are legacy — avoid them for security-critical purposes, but they are fine for basic integrity checks.

Text encoding:

Algorithms

Algorithm

Hash Value

Enter text or drop a file above to compute hashes.

Verify / Compare Hash

Paste an expected hash to verify:

How to Use

Hashing Text:
1. Select the Text Input tab.
2. Type or paste your text into the green-bordered area.
3. Hashes are computed instantly as you type.

Hashing a File (Integrity Check):
1. Select the File Input tab.
2. Drag & drop your file or click to browse.
3. All selected hash values are computed and displayed.

Verifying a Hash:
1. Compute hashes as above.
2. Paste the expected hash into the Verify / Compare Hash field.
3. The tool will automatically identify the matching algorithm and show whether the hash matches.

About This Tool

Use our online hash generator and file checksum verifier to compute cryptographic hashes for text and files. Features industry-standard algorithms: SHA-2, SHA-3, BLAKE2b/2s, BLAKE3, xxHash, SM3, Whirlpool, RIPEMD-160, MD5, CRC32, CRC64, Adler-32 and more.
WebAssembly Accelerated: All hash algorithms run as compiled WebAssembly modules for near-native speed, powered by the hash-wasm library. Large files are supported.
Client-Side Security: This hash calculator is fully client-side. All data is processed locally in your browser. Nothing leaves your device.
File Integrity Checker: Verify downloaded files by comparing their hash against the value published by the source — detect corruption or tampering instantly.
Supported Algorithms: SHA-224, SHA-256, SHA-384, SHA-512, SHA3-224, SHA3-256, SHA3-384, SHA3-512, BLAKE2b, BLAKE2s, BLAKE3, XXH32, XXH64, XXH3, XXH128, SM3, Whirlpool, RIPEMD-160, MD5, SHA-1, CRC32, CRC64-ECMA, Adler-32.

Algorithm Self-Test

All hash implementations are verified against basic official test vectors (NIST, RFC, reference implementations) on page load.

Running self-test…

Test Details

Frequently Asked Questions

Issue: What is a hash and why do I need one?

Answer: A hash is a fixed-size digital fingerprint of data. Even a tiny change in the input produces a completely different hash. This makes hashes ideal for verifying file integrity (e.g. downloaded software) and detecting tampering.

Issue: Which hashing algorithm should I use?

Answer: SHA-256 is the most widely used and a safe default. SHA3-256 is the newest NIST standard. BLAKE3 is very fast. xxHash variants (XXH3, XXH128) are extremely fast non-cryptographic hashes ideal for checksums. SM3 is the Chinese national standard. Whirlpool and RIPEMD-160 are established algorithms used in specific ecosystems. MD5 and SHA-1 are legacy — avoid them for security-critical purposes, but they are fine for basic integrity checks.

Issue: Is my data safe when using this online hash generator?

Answer: Yes. This tool runs entirely in your browser using WebAssembly. No data is uploaded to any server. You can even disconnect from the Internet after loading the page and it will continue to work.

Issue: What is WebAssembly and why does it matter for hashing?

Answer: WebAssembly (WASM) lets the browser run compiled code at near-native speed. All hash algorithms in this tool use WASM via the hash-wasm library, making them significantly faster than equivalent pure-JavaScript implementations — especially for large files.

Verify / Compare Hash

How to Use

About This Tool

Algorithm Self-Test

Frequently Asked Questions

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