Yes — SHA-256 is currently considered cryptographically secure and is widely used in TLS, blockchain and secure checksum applications.

Why is my hash always 64 characters?

SHA-256 always produces a 256-bit hash, represented as 64 hexadecimal characters, regardless of input length.

Can I reverse a SHA-256 hash back to the original text?

Not directly — hashing is one-way by design and considered computationally infeasible to reverse.

Is my text uploaded anywhere?

No — hashing uses your browser's built-in Web Crypto API and never leaves your device.

Is SHA-256 the same algorithm Bitcoin uses?

Yes — Bitcoin uses SHA-256 (applied twice) as part of its proof-of-work mining process.

Does browser support for this tool vary?

The Web Crypto API used here is supported in all modern browsers over a secure (HTTPS) connection.

Generatori di Hash

Generatore SHA-256 — Strumento Online Gratuito

Genera un hash SHA-256 da qualsiasi testo usando l'API Web Crypto.

Usa Questo Strumento

Funziona nel Tuo Browser
Risultati Istantanei
100% Privato

Your Text

Uppercase output

Scopri di Più

What Is a SHA-256 Hash?

SHA-256 is a cryptographic hash function that converts any input text into a fixed 64-character hexadecimal string (256 bits). It is part of the SHA-2 family and is currently the most widely used general-purpose secure hash algorithm, used in TLS certificates, blockchain systems, and secure checksums.

Like all hash functions, SHA-256 is deterministic (the same input always produces the same output) and collision-resistant in practice, meaning it is currently computationally infeasible to find two different inputs that produce the same hash.

Chi Usa Questo Strumento?

Per le Aziende

Generate a secure checksum to verify data integrity.

Per Uso Personale

Check whether a downloaded file or piece of text matches a published hash.

Per Studenti

Learn how SHA-256 works for a security or cryptography course.

Per gli Uffici

Generate a secure reference hash for an internal document or record.

Perché Usare Questo Strumento

Caratteristiche Principali

Web Crypto API

Uses your browser's native, audited SHA-256 implementation.

100% Private

Your text is hashed entirely in your browser — nothing is uploaded.

Uppercase Option

Toggle between lowercase and uppercase hex output.

One-Click Copy

Copy the resulting hash straight to your clipboard.

Il Risultato

Vantaggi

Industry-Standard Security

SHA-256 is currently considered secure for integrity and verification purposes.

No Software Needed

Generate a secure hash without a command line or programming language.

Completely Private

Sensitive text is never sent to a server, since hashing happens locally.

Passo dopo Passo

Come Usare Generatore SHA-256

Type or Paste Text

Add the text you want to hash.

Read the Generated Hash

The SHA-256 hash appears automatically below.

Copy the Hash

Use the Copy button to grab the result.

Specifiche

Dettagli Tecnici

Dettaglio	Valore
Input	Plain text, encoded as UTF-8 before hashing
Elaborazione	No practical limit — handled entirely by your browser
Output	Standard SHA-256 (FIPS 180-4), producing a 256-bit (64 hex character) hash

Puoi Verificarlo

Privacy e Sicurezza

Cosa succede realmente al tuo file quando usi questo strumento.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

Ottieni Risultati Migliori

Consigli

Use This to Verify Downloads

Compare a file's published SHA-256 hash against one you compute yourself to confirm it hasn't been tampered with.

Prefer SHA-256 Over MD5/SHA-1

For anything security-related, SHA-256 is the safer default choice.

Domande Frequenti