Chiffrer / Déchiffrer un Texte
Encrypt and decrypt text using AES-256 password protection
100 % gratuit. Fonctionne entièrement dans votre navigateur : vos fichiers et données ne quittent jamais votre appareil et rien n'est envoyé à un serveur.
À propos de cet outil
Encrypt text using AES-256 with a password you choose, producing scrambled ciphertext that can only be decrypted back to the original with the same password - useful for protecting sensitive notes, sharing a secret securely, or encrypting text before storing it somewhere less trusted.
Comment utiliser cet outil
- Choose encrypt or decrypt modeSelect whether you want to protect or recover text.
- Enter plaintext/ciphertextPaste source content exactly, preserving formatting where needed.
- Set strong passwordUse long unique passphrase for reliable protection.
- Run and copy outputGenerate ciphertext or restored plaintext instantly in-browser.
Pourquoi l’utiliser
- Strong AES-256 protection for sensitive text snippets.
- Runs locally so content and passwords stay on device.
- Simple workflow for secure sharing of short secrets.
- Supports both encryption and decryption in one interface.
Usages courants
- Protecting confidential notes before storage.
- Sharing temporary credentials via encrypted text.
- Creating secure snippets for cross-channel communication.
- Teaching encryption basics in practical demos.
Conseils pour de meilleurs résultats
- Use unique passphrase per secret context.
- Share password through separate channel from ciphertext.
- Store recovery password safely; no reset exists.
- Test decrypt flow once before relying on workflow.
Erreurs à éviter
- Using weak or reused passwords for encryption.
- Sending password and ciphertext in same message.
- Assuming encrypted text is recoverable without key.
- Pasting modified ciphertext and expecting successful decrypt.
Questions fréquentes
AES-256 is a widely-trusted, industry-standard encryption algorithm used to protect everything from government data to banking systems - it's considered extremely secure when used correctly with a strong password.
The password is not stored anywhere by this tool - if you forget it, there is no way to recover the original text from the encrypted output. Keep the password somewhere safe.
Encryption/decryption runs entirely in your browser - neither your text nor your password is transmitted anywhere.
The encryption algorithm is only as strong as the password protecting it - use a long, random, unique password rather than something easily guessable, since a weak password undermines even strong encryption.
Yes. Encrypt Decrypt is free for normal use with no account required, and ToolBox does not add a watermark to your result.
Most tools in this category run in your browser so the file stays on your device. If a tool needs a temporary server job, files are handled for that job only and are not kept as a lasting archive.
No install needed. Open Encrypt Decrypt in your browser, add your file or paste your input, then download or copy the result.
Yes on modern mobile browsers. For large files, a desktop browser is usually faster and more reliable.
Les gens recherchent aussi
- encrypt decrypt online free
- encrypt decrypt no signup
- free encrypt decrypt in browser
- free encrypt decrypt online
- encrypt decrypt without uploading
- best free encrypt decrypt