início/dev/hash

Hash Generator Online

SHA-1, SHA-256, SHA-512

Input

SHA-1

—

SHA-256

—

SHA-384

—

SHA-512

—

Como usar Gerador de Hash

1
Enter your text
Type or paste the text you want to hash.
2
View hashes
SHA-1, SHA-256, and SHA-512 hashes are computed instantly.
3
Copy the hash
Click copy next to any hash value to use it.

Perguntas frequentes

Is my data safe?

Yes. All processing happens entirely in your browser. Your data never leaves your device and is never uploaded to any server.

Are these hashes cryptographically secure?

SHA-256 and SHA-512 are considered cryptographically secure for data integrity verification. SHA-1 is provided for compatibility with legacy systems but is not recommended for new security-critical use — meaningful collision attacks have been demonstrated against SHA-1.

Can I use SHA-256 for password storage?

No. Raw SHA-256 is not suitable for password storage because it is too fast — an attacker can try billions of guesses per second. Use slow, purpose-built password hashing functions like bcrypt, Argon2, or scrypt instead.

Why does changing one character completely change the hash?

This is the avalanche effect — a core property of cryptographic hash functions. Even a 1-bit change in input flips roughly half the output bits on average. This makes hashes useful for detecting any modification to data.

Can I hash a file with this tool?

This tool hashes text input. To hash an entire binary file, you would need a command-line tool (sha256sum on Linux/Mac) or a file hashing tool. Text files can be pasted here if their contents are readable plain text.

Saiba mais

O que é Hash Generator?

Generate SHA-1, SHA-256, and SHA-512 cryptographic hashes from any text input instantly. All hashes are computed locally using the browser's Web Crypto API, which provides the same cryptographic primitives used in TLS/SSL connections. Useful for verifying file integrity, generating checksums, creating content fingerprints, and learning about cryptographic hash functions. Results appear immediately as you type. Your input never leaves your browser — no sign-up required.

Por que usar Hash Generator?

Uses the Web Crypto API — the same cryptographic engine the browser uses for HTTPS. Results are identical to server-side implementations.
All three SHA variants in one tool — compare SHA-1, SHA-256, and SHA-512 side by side without switching tools.
Real-time hashing — hashes update as you type, making it easy to verify small changes produce different outputs.
Completely private — your input text never leaves your browser. Safe to hash sensitive strings.
No installation or account required — works immediately in any modern browser.

Casos de uso de Hash Generator

Data integrity verification

Hash a file's contents (as text) and compare against a published checksum to verify the file has not been tampered with or corrupted.

Content fingerprinting

Generate a SHA-256 hash as a unique identifier for a piece of content. Identical content always produces the same hash, while even a single changed character produces a completely different hash.

Password hashing exploration

Understand how password hashing works by experimenting with SHA-256 and SHA-512. Note: for production password storage, use bcrypt or Argon2, not raw SHA.

API signature debugging

Some APIs require HMAC-SHA256 request signatures. Generate the hash of your expected payload to compare against the API's expected value during integration debugging.

Dicas e boas práticas

💡SHA-256 produces a 64-character hex string. SHA-512 produces 128 characters. Both are acceptable for integrity checks — SHA-512 is marginally slower but longer.
💡Hashes are deterministic — the same input always produces the same output. Even a single extra space or newline will produce a completely different hash.
💡SHA-1 is deprecated for security use (collision attacks are possible) but is still widely used for non-security purposes like Git commit IDs and older integrity checks.
💡Uppercase and lowercase hash strings are equivalent — 'a3f4...' and 'A3F4...' represent the same hash value.

Como funciona

Hashes are computed using the Web Crypto API's SubtleCrypto.digest() method, which is an asynchronous native browser implementation. The input text is encoded to UTF-8 using TextEncoder before hashing, matching the behavior of most server-side hash implementations. The resulting ArrayBuffer is converted to a hex string by mapping each byte to a two-character hex pair. The Web Crypto API runs in a sandboxed context and cannot access the network, guaranteeing that your input data stays within the browser's JavaScript engine.