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No! You can upload files and generate a QR code without any account at all. Just open the home page, drag-and-drop your files, and hit "Generate QR". Login is completely optional — it only adds features like transfer history and a profile card.

QR file transfer links automatically expire after 7 minutes. After that, the download code is no longer valid. If you enabled "One-Time Download", the link expires after the first successful download, whichever comes first. You can also manually expire a link at any time using the "Expire Link" button.

When a transfer link expires, the encrypted file chunks are automatically deleted from our servers. There is no way to recover them after expiry — this is by design for your privacy.

Yes. There are file size limits to ensure fair usage and server performance for all users. Exact limits may change — check the upload UI for the current limits. For large files, we recommend splitting them into smaller parts before sharing.

Yes! You can select and upload multiple files in a single transfer. The receiver gets one QR code that gives access to all the files in that batch. All files in a batch are encrypted together under the same session key.

When you enable the "One-Time Download" checkbox before generating the QR, the link becomes valid for exactly one download. After the first person successfully downloads the file, the link is automatically invalidated. This is perfect for sharing sensitive files securely.

Yes! You can optionally set a password before generating the QR code. The receiver will need to enter the correct password to decrypt and download the files. The password is used for additional encryption on top of the AES-256 baseline — even if someone scans the QR, they can't access the files without the password.

No. Files are encrypted in your browser using AES-256-GCM before they ever leave your device. The server receives only encrypted chunks and a wrapped key — it has no access to the raw decryption key. Even if our storage were somehow compromised, the chunks would be unreadable without both the wrapped key and the server secret.

Never in plain text. Passwords are hashed with PBKDF2-SHA256 (100,000 iterations) and a unique random salt. Only the hash and salt are stored — verification uses constant-time comparison to prevent timing attacks. We literally cannot recover your password if you lose it.

Yes. All communication between your browser and Setu's servers uses HTTPS/TLS. WebSocket connections for live rooms also use WSS (WebSocket Secure). Data is encrypted in transit at all times.

Your name/nickname is visible to members of rooms you join — this is necessary for the collaboration feature. Your email, phone number, and country are stored in our secured database and are not publicly accessible. Only you can see your full profile details.

We use browser localStorage (not cookies) to store your theme preference and session token. We also use anonymized Google Analytics to understand platform usage. We do not use advertising cookies, retargeting, or cross-site tracking technologies.

When you log in, Setu issues a short-lived JWT (JSON Web Token) that is stored securely in your browser. This token is sent with each authenticated request to verify your identity. Tokens expire automatically to limit the window of misuse if a token were ever compromised.

Yes. Live Room & Chat requires authentication. This allows the server to verify your identity, track room membership securely, and display your name to other participants. You cannot join a room as a guest.

No. Room chat messages are relayed live over WebSocket to connected members only. Messages are not permanently stored on the server. When you leave or the room closes, the session ends and the messages are gone — like a real conversation.

Setu rooms are designed for team collaboration. The exact member limit depends on the current server configuration. Check the room page for any displayed limits. For large groups, consider creating multiple rooms.

When all members leave a room, the live session ends. The room ID may be reused or cleaned up depending on the room type (instant vs. persistent). Any messages in the session are cleared. Files shared within a room follow the same 7-minute expiry rule.

Click the "Connect" button in the navigation bar on the home page, then choose "Sign Up". Fill in your name, email, and password. That's it — your account is ready to use. You don't need to verify your email to get started, but it's recommended for account recovery.

Use the "Forgot Password" option on the login page, or contact us directly. Because we hash passwords using PBKDF2-SHA256, we cannot recover your original password — only reset it.

Yes. You have the right to request deletion of your account and all associated personal data. Please contact us through the contact form and we'll process your deletion request within 30 days.

For registered users, we store: your name, nickname (optional), email address, hashed password, phone number (optional), and country (optional). Transfer history is also stored so you can review past transfers. See our Privacy Policy for full details.

Yes! The QR File Transfer feature works completely without an account. However, to access:

• 🏠 Live rooms & chat — account required
• 📋 Transfer history — account required
• 👤 Profile card — account required
• 📁 Basic file transfer via QR — no account needed

Setu (सेतु, meaning "bridge" in Sanskrit) is a real-time collaboration platform built entirely in the browser. It offers QR-based encrypted file sharing, live rooms with chat, instant room creation, and more — with no installations required. Learn how it works →

Yes, Setu is currently free to use. We're focused on building a great product and growing the community. If we ever introduce paid tiers, existing users will be given advance notice and free features will remain available.

Yes! Setu is fully responsive and works on smartphones and tablets. The QR code scanning workflow is especially convenient on mobile — you can share between devices by scanning the QR with your phone's camera. The UI adapts gracefully to all screen sizes.

Setu works on all modern browsers that support WebCrypto API and WebSockets, including:

• Google Chrome 90+
• Mozilla Firefox 88+
• Microsoft Edge 90+
• Safari 15+ (macOS & iOS)
• Opera 76+

We recommend using the latest version of your browser for the best experience.

We'd love to hear from you! Use our Contact page to report bugs or submit feature ideas. Choose the appropriate category ("Issue / Problem" or "Idea / Improvement") so we can route your message to the right team.

Yes! Setu's frontend code is available on GitHub. We believe in transparency, especially for a security-focused product. You're welcome to review the code, report issues, or contribute.