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Caesar Chiffre

Verschlüsselt und entschlüsselt mit Caesar-Chiffre.

Caesar Chiffre is a free online sicherheit tool that works right in your browser — whatever you enter is processed locally and never sent to a server. No installation, no signup; works on both phone and desktop, ready to use instantly.

Alle Sicherheitswerkzeuge laufen lokal ohne externe Datenübertragung. Passwort-Generierung, Hash-Berechnung und andere sensible Operationen erfolgen vollständig in Ihrem Browser.

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How to use

  1. 1 Öffnen Sie die Caesar Chiffre-Tool-Seite.
  2. 2 Fügen Sie Ihren Text, Ihre URL oder Ihre Daten in den Eingabebereich ein.
  3. 3 Wählen Sie den Operationsmodus und die Parameter.
  4. 4 Führen Sie das Tool aus und überprüfen Sie das Ergebnis.
  5. 5 Kopieren oder herunterladen Sie das Ergebnis.

Why we built this tool

When testing security tools, sending sensitive data like passwords or tokens to a remote server defeats the purpose. We built this tool to run entirely in your browser using the Web Crypto API — your data never leaves your device.

About Caesar Chiffre: what you should know

DevOps engineers and security-conscious developers who rotate secrets and verify integrity as part of their daily workflow. Whether you are checking a file checksum, generating an API key, or validating a token, doing it locally avoids sending sensitive data through an external service.

Key features

  • Cryptographically Secure Output — Uses the Web Crypto API under the hood, so generated values have real entropy and are suitable for production use — not weak Math.random() output.
  • No Server, No Storage — Every operation runs entirely in your browser. Secrets, hashes, and tokens are never transmitted or logged by any third-party service.
  • Configurable Parameters — Adjust length, algorithm, or character set on the fly to match your specific requirements. Whether you need a short token or a long hash, the tool adapts.

Common use cases

  • Building Lookup Tables for Testing — Generate a batch of hashes or tokens to populate a test database. Each value is independent, so tests do not interfere with each other.
  • Rotating Secrets After a Breach — When a key or password may have been exposed, generate a fresh replacement here and update your configs — all without exposing the new value to a third party.

Häufig gestellte Fragen

Ist dieses Tool kostenlos?

Ja, völlig kostenlos und ohne Anmeldung.

Kann ich es auf dem Handy nutzen?

Ja, es funktioniert auf mobilen Browsern mit Touch-Unterstützung.

Zu welcher Kategorie gehört es?

Sicherheit

Sind die Prüftools sicher?

Völlig sicher. Alle Prüfungen laufen lokal in Ihrem Browser, ohne Daten oder Anfragen extern zu senden.

What hash algorithms are supported for checksum generation?

ToolPure supports MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hash algorithms. All hashing is performed locally using the Web Crypto API, ensuring your data never leaves your browser.

Can I generate and validate JWT tokens?

Yes, you can decode JWT tokens to inspect header and payload, and generate new JWT tokens with custom claims. The tool supports HS256, HS384, and HS512 signing algorithms.

Are password generation tools truly random?

Yes, password generation uses the Web Crypto API getRandomValues() function, which provides cryptographically secure random numbers. Generated passwords are not stored or transmitted anywhere.

Is Caesar Chiffre safe? Is my data uploaded or stored?

Yes. Caesar Chiffre is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.

🔒 Privacy & Security：All processing happens locally in your browser. Files are never uploaded or stored.

🔒 Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.

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