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

• Pangram

  A longer ASCII sample — SHA-256 is d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592 when the algorithm is set to SHA-256.

  The quick brown fox jumps over the lazy dog

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

O Gerador de Hash calcula digests criptográficos de texto com a Web Crypto API — SHA-1, SHA-256, SHA-384 ou SHA-512 — e imprime hex em minúsculas pronto para configs e comparações. Use para checksums, chaves de cache e depuração entre serviços.

Hashes são impressões digitais unidirecionais, não criptografia. Pequenas mudanças na entrada produzem saídas muito diferentes; você não recupera o texto original só com o digest. Não armazene senhas como digests SHA crus — use um KDF de senha dedicado. MD5 é omitido de propósito porque o Web Crypto não o expõe.

O cálculo do digest fica no navegador via SubtleCrypto. Cole corpos de requisição ou strings de fixture sem enviá-los a um site de hash hospedado. Alinhe bem as codificações: quebras de linha finais e UTF-8 versus outras encodings são motivos comuns de discordância entre duas strings “idênticas”.

Boa prática: prefira SHA-256 ou mais forte para novas verificações de integridade; trate SHA-1 só como legado. Alinhe algoritmo e normalização com o outro serviço antes de depurar divergências. Use o Gerador de UUID para IDs aleatórios e Base64 quando precisar de codificação reversível em vez de um digest.

Frequently asked questions

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