Hash Generator

Key takeaways

• SHA-1 and SHA-2 family via SubtleCrypto
• Hex digest output
• Input stays in the browser
• Not a substitute for password hashing KDFs

What is a cryptographic hash?

A hash function maps input to a fixed-length digest. Small input changes produce very different outputs; the original input cannot be recovered from the digest alone.

Hashes are for integrity checks and fingerprints, not confidentiality. Do not store passwords as raw SHA digests — use a dedicated password KDF. MD5 is not offered here because Web Crypto does not expose it.

Features

• Multiple algorithms

  Switch between SHA-1 and the SHA-2 family in one workspace.

• Hex output

  Lowercase hexadecimal digests ready for configs and comparisons.

• Input limits

  Enforces shared character limits to keep the tab responsive.

• Private by default

  Hashing stays on-device via SubtleCrypto.

How it works

1. 1

   Paste text

   Enter the string you want to hash (UTF-8 bytes).

2. 2

   Pick an algorithm

   Choose SHA-1, SHA-256, SHA-384, or SHA-512.

3. 3

   Hash & copy

   Generate the digest and copy the hex string.

Example walkthroughs

• Hello

  SHA-256 of “hello” is 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824.

  hello

Supported algorithms

Use cases

• Cache keys

  Derive stable keys from request bodies or query strings.

• Integrity checks

  Compare digests when verifying copied payloads.

• Debug pipelines

  Confirm hashing matches between services during local testing.

Code snippets

• SHA-256 with Web Crypto

  js

  Hash Generator uses SubtleCrypto the same way for SHA algorithms.

  const data = new TextEncoder().encode(text);
  const digest = await crypto.subtle.digest("SHA-256", data);
  const hex = [...new Uint8Array(digest)]
    .map((b) => b.toString(16).padStart(2, "0"))
    .join("");

Common errors

• Digest does not match another service

  Cause: Different algorithms, encodings, or trailing newlines in the input.

  Fix: Confirm UTF-8 text, trim consistently, and match SHA-1 vs SHA-256.

• Looking for MD5

  Cause: Web Crypto does not expose MD5.

  Fix: Prefer SHA-256 for new work; MD5 is intentionally not offered here yet.

About Hash Generator

Hash Generator computes cryptographic digests of text using the Web Crypto API (SHA-1, SHA-256, SHA-384, SHA-512).

Use it for checksums, cache keys, and debugging — your input never leaves the browser.

Frequently asked questions

Explore more

• All developer tools

  Browse formatters, converters, encoders, and more.

• Hash tools

  SHA digests and checksum helpers that run in your browser.