Sécurité Outils
Hash generators, JWT decoders, password tools, subnet calculators — security utilities.
Overview
Security utilities deserve special care: by definition, you're processing sensitive data (secrets, tokens, hashes, credentials). The tools in this category all run client-side, never log to servers, and use cryptographically-strong primitives from the browser's Web Crypto API. Use them for testing, debugging, and verification — without ever sending the secret elsewhere.
Common Use Cases
- →Generate strong, random passwords with cryptographic randomness.
- →Decode and verify JWTs (with secret or public key).
- →Compute SHA-256 hashes to verify file integrity.
- →Calculate IP subnets, CIDRs, and network ranges.
Frequently Asked Questions
Is it safe to paste my JWT into a web tool?
Only if the tool runs entirely client-side (this one does). To verify, open dev tools' Network panel before pasting — confirm no network requests during processing. Never paste tokens into tools that send them to a server.
Why use SHA-256 over MD5?
MD5 is cryptographically broken (collisions are easy to find). Use it only for non-security tasks like cache keys. SHA-256 remains secure for all current applications including TLS, Bitcoin, and code signing.
What's a good password length?
16 characters for high-value accounts (email, banking), 12+ for general use. Length beats complexity — a 20-character all-lowercase password is stronger than a 10-character mixed-case-and-symbol password.
Générateur de Hash
Générez des hachages MD5, SHA-1, SHA-256 instantanément.
Vérificateur DNS
Consultez les enregistrements DNS de n'importe quel domaine instantanément.
Générateur Politique Confidentialité
Générez des politiques de confidentialité pour votre site.
Visionneur EXIF
Inspectez les métadonnées cachées de vos photos.
Éditeur EXIF
Modifiez, ajoutez ou supprimez des métadonnées dans vos photos JPEG.