Many online file-encryption or password-protection tools ask you to upload your file to a server first — which means trusting a stranger's server with the exact file you're trying to protect. NearSeal encrypts entirely on your device using your browser's built-in cryptography; the unprotected file never leaves your browser.
→ 0 files sent to a server · encryption runs on your device
Emailing a sensitive document or storing it in the cloud exposes it to whoever runs the server. NearSeal encrypts files locally with a key derived from your passphrase — the default NearSeal format uses AES-256-GCM (PBKDF2), or choose the age format, the open age-encryption.org standard (scrypt + ChaCha20-Poly1305), so the file opens with any age-compatible tool, not just this site. Nothing is sent to a server and no account is required.
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