AES File Encryptor/Decryptor
Encrypt and decrypt files locally in your browser using AES-256-GCM with PBKDF2 passphrase-based key derivation. Secure your files before sharing, with no server uploads and no account required.
Encrypt files using AES-256-GCM with PBKDF2-derived keys, then decrypt them locally in your browser. No uploads, no server processing, and no account required.
Higher iterations increase brute-force resistance and processing time.
Use at least 8 characters.
Must match to avoid irreversible encryption mistakes.
Security note: if you forget your passphrase, encrypted files cannot be recovered. Keep a secure backup.
AES-256-GCM Encryption
Encrypt files with AES-256-GCM, an authenticated encryption mode that protects confidentiality and detects tampering during decryption. The output package includes integrity-checked ciphertext.
PBKDF2 Key Derivation
Passphrases are hardened with PBKDF2-SHA256 and configurable iteration counts, increasing resistance against brute-force attacks while keeping full compatibility with browser Web Crypto.
Browser-Only Privacy
Files and passphrases stay on your device. Encryption and decryption run entirely in your browser using the Web Crypto API with no server uploads or remote processing.
Free and Unlimited
Encrypt and decrypt as many files as you need without account signup, usage caps, or hidden costs. Useful for personal privacy workflows and recurring operational handoffs.
Secure Client File Exchange
Encrypt sensitive PDFs, reports, or archives before sharing over email or chat channels, then share the passphrase through a separate secure path.
Local Backup Protection
Protect exported database snapshots, credentials, and personal records in local backups so copied files remain unreadable without the passphrase.
Compliance-Oriented Handling
Encrypt ad-hoc extracts containing customer or employee data before temporary transfer between teams, reducing accidental disclosure risk in intermediate storage.
Pre-Upload Hardening
Encrypt files locally before sending them to third-party systems where you prefer zero-trust storage assumptions and retain exclusive decryption control.
Cross-Team Secure Handoffs
Encrypt handoff packages between engineering, legal, and finance teams while preserving filename metadata to simplify recovery on the receiving side.
Incident Response Artefacts
Protect logs, screenshots, and forensic bundles during incident investigations when material must be shared rapidly but still guarded against unauthorized access.
AES File Encryptor/Decryptor protects local files using modern browser cryptography primitives. The tool derives an AES-256-GCM key from your passphrase via PBKDF2-SHA256 and encrypts the entire file payload inside a versioned ABACKAES container. Decryption validates integrity before restoring the original content.
Cryptographic Design
Each encryption operation generates a fresh random salt and IV. The passphrase is never used directly as a key; instead it is stretched through PBKDF2 to create a 256-bit AES key. AES-GCM provides both confidentiality and authentication, so modified ciphertext fails decryption instead of returning corrupted plaintext.
Container Format
Encrypted output includes a magic header, version, PBKDF2 iteration count, salt, IV, embedded filename, and ciphertext payload. This allows the decryptor to recover metadata and apply the same derivation parameters automatically. The resulting file uses an .abackaes extension.
Passphrase Guidance
Use a long passphrase with mixed words and symbols, and avoid reusing passwords from other systems. If the passphrase is lost, the encrypted data cannot be recovered. For team workflows, transmit passphrases over a separate secure channel from the encrypted file.
Privacy and Trust Model
All encryption and decryption happens in your browser via Web Crypto API with no network transfer of file bytes or passphrase values. This makes the tool suitable when policy requires local-only handling of sensitive records and minimal operational surface area.
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Frequently Asked Questions About AES File Encryptor/Decryptor
The tool uses AES-256-GCM for authenticated encryption. Your passphrase is converted into an AES key using PBKDF2-SHA256 with configurable iteration counts and per-file random salt. AES-GCM ensures both confidentiality and tamper detection during decryption.
Encryption and decryption run entirely in your browser using the Web Crypto API. Files and passphrases are not uploaded to external servers, which keeps sensitive content local to your device and minimizes data exposure risk.
If the passphrase is lost, the encrypted file cannot be recovered through this tool. AES-GCM with PBKDF2 is designed to resist brute-force recovery. Store passphrases securely in a password manager or secure vault before distributing encrypted files.
Yes. The encrypted output embeds required metadata such as iteration count, salt, and IV in a versioned ABACKAES container. As long as you have the correct passphrase, you can decrypt the file and restore the original content.
Higher iteration counts increase resistance to password-guessing attacks but also require more processing time. The balanced default of 250,000 is a strong starting point for most workflows, while 400,000 offers extra hardening on modern hardware.
Yes. You can encrypt any file type because the tool operates on raw bytes rather than file semantics. Documents, images, archives, and binary payloads can all be processed and restored exactly after successful decryption.
Yes. The tool is free to use without signup, subscriptions, or usage quotas. You can encrypt and decrypt files as often as needed for development, operations, legal transfer, or personal privacy workflows.