エンコーダー＆暗号化
AESファイル暗号化 / 復号化
Encrypt files with AES-GCM and a passphrase.
Drop a file or click to browse
Any file. Downloads as <name>.aes.json after encryption.
AES-GCM 256-bit · PBKDF2 200,000 iterations · everything runs in your browser.
編集者注
Understanding · A passphrase, a key derivation, and a cipher.
この詳細な解説章は現在、英語版のみで提供されています。上の変換ツールはあなたの言語で動作しますが、長文の解説記事はまだ翻訳されていません。
よくある質問
Quick answers.
›What happens if I forget my password?
The data is unrecoverable. Because this is a privacy-first tool with no server-side storage, there is no 'reset' or recovery mechanism for lost passphrases.
›Is the encryption local or server-side?
All encryption and decryption occur locally on your device via your browser's Web Crypto API. Your files and passwords are never uploaded to any external server.
›Why is AES-GCM better than CBC mode?
GCM provides authenticated encryption, meaning it can detect if any part of the encrypted file has been tampered with or corrupted before decryption. Traditional CBC mode only provides privacy and requires a separate MAC for integrity.
›What is the file size limit?
The limit depends on your browser's available memory. For files larger than 1GB, we recommend using a dedicated desktop tool to avoid browser crashes or memory exhaustion.
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