Is SHA-512 more secure than SHA-256?

Both are currently considered cryptographically secure; SHA-512 offers a larger output size and security margin, but SHA-256 is more commonly required by existing standards.

Why is my hash always 128 characters?

SHA-512 always produces a 512-bit hash, represented as 128 hexadecimal characters, regardless of input length.

Is my text uploaded anywhere?

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

Can I reverse a SHA-512 hash back to the original text?

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

Is SHA-512 slower than SHA-256?

Not necessarily — SHA-512's 64-bit internal operations can make it faster than SHA-256 on modern 64-bit processors.

Which hash should I use if a system doesn't specify?

SHA-256 is the more commonly expected default; use SHA-512 only if a system specifically calls for it.

Générateurs de Hachage

Générateur SHA-512 — Outil en Ligne Gratuit

Générez un hachage SHA-512 à partir de tout texte via l'API Web Crypto.

Utiliser Cet Outil

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Résultats Instantanés
100% Privé

Your Text

Uppercase output

What Is a SHA-512 Hash?

SHA-512 is a cryptographic hash function from the same SHA-2 family as SHA-256, but it produces a longer, 128-character hexadecimal hash (512 bits) using 64-bit internal operations, which can make it faster than SHA-256 on 64-bit hardware despite the longer output.

It is used anywhere a very high security margin or longer hash length is desired, including some password-hashing schemes, certificate systems, and data-integrity applications.

Qui Utilise Cet Outil ?

Pour les Entreprises

Generate a high-security checksum for sensitive data verification.

Pour un Usage Personnel

Check whether a downloaded file or piece of text matches a published SHA-512 hash.

Pour les Étudiants

Compare SHA-512 against SHA-256 for a cryptography course.

Pour les Bureaux

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

Pourquoi Utiliser Cet Outil

Fonctionnalités Clés

Web Crypto API

Uses your browser's native, audited SHA-512 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.

Le Résultat

Avantages

Extra-Long Hash Output

A 512-bit hash offers an even larger security margin than SHA-256.

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.

Étape par Étape

Comment Utiliser Générateur SHA-512

Type or Paste Text

Add the text you want to hash.

Read the Generated Hash

The SHA-512 hash appears automatically below.

Copy the Hash

Use the Copy button to grab the result.

Spécifications

Détails Techniques

Détail	Valeur
Entrée	Plain text, encoded as UTF-8 before hashing
Traitement	No practical limit — handled entirely by your browser
Sortie	Standard SHA-512 (FIPS 180-4), producing a 512-bit (128 hex character) hash

Vous Pouvez le Vérifier

Confidentialité & Sécurité

Ce qui se passe réellement avec votre fichier lorsque vous utilisez cet outil.

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.

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Astuces

Use SHA-512 for Extra-Long Hash Requirements

Choose SHA-512 when a system specifically requires a 128-character hash.

SHA-512 Can Be Faster on 64-Bit Systems

Despite the longer output, SHA-512 can outperform SHA-256 on 64-bit hardware.

Questions Fréquentes