#️⃣

Hash String

Compute cryptographic hashes using SHA-256, SHA-512, BLAKE2b, and more.

POST 1 credit /v1/auth/hash

curl -X POST "https://auth.toolkitapi.io/v1/auth/hash" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "input": "Hello, World!",
    "algorithm": "sha256"
  }'

import httpx

resp = httpx.post(
    "https://auth.toolkitapi.io/v1/auth/hash",
    json={
    "input": "Hello, World!",
    "algorithm": "sha256"
  },
)
print(resp.json())

const resp = await fetch("https://auth.toolkitapi.io/v1/auth/hash", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "input": "Hello, World!",
    "algorithm": "sha256"
  }),
});
const data = await resp.json();
console.log(data);

# See curl example

Response 200 OK

{
  "hash": "dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f",
  "algorithm": "sha256",
  "input_length": 13
}

Try It Live

Live Demo

Response

Description

Compute cryptographic hashes using SHA-256, SHA-512, BLAKE2b, and more.

How to Use

1

1. Set the `input` field to the string you want to hash.

2

2. Choose an `algorithm` — defaults to `sha256` if not specified. Available options: `md5`, `sha1`, `sha256`, `sha384`, `sha512`, `sha3-256`, `sha3-512`, `blake2b`.

3

3. Send a POST request. The response contains the hex-encoded hash digest.

About This Tool

The Hash String endpoint computes a cryptographic hash digest of any input string. It supports a wide range of algorithms including MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA3-256, SHA3-512, and BLAKE2b.

Cryptographic hashes are one-way functions that produce a fixed-size digest from arbitrary input. They are fundamental to data integrity verification, content addressing, digital signatures, and deduplication workflows.

Note that MD5 and SHA-1 are considered cryptographically broken for collision resistance and should only be used for checksums or legacy compatibility — not for security purposes.

Why Use This Tool

Data integrity verification — Hash files or payloads and compare digests to detect changes
Content addressing — Use hashes as unique identifiers for data deduplication
Checksum generation — Create checksums for downloads or data transfers
Fingerprinting — Generate unique fingerprints for strings, documents, or configurations
Cache key generation — Hash complex query parameters into fixed-length cache keys

Frequently Asked Questions

Which algorithm should I use?

For general purpose hashing, `sha256` is the standard choice. Use `blake2b` for better performance. Avoid `md5` and `sha1` for security-sensitive applications.

Can I hash binary data?

This endpoint accepts string input encoded as UTF-8. For binary data, encode it as Base64 first, then hash the encoded string.

Is the hash deterministic?

Yes. The same input and algorithm always produce the same hash. This is what makes hashing useful for integrity checks and deduplication.

What's the difference between SHA-256 and SHA3-256?

SHA-256 belongs to the SHA-2 family, while SHA3-256 uses a completely different internal construction (Keccak). Both produce 256-bit digests and are considered secure, but SHA3 provides an alternative if SHA-2 is ever compromised.

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