WolfP2PShare a sensitive file privately
For:All users
No technical knowledge required.A personal record, signed agreement, customer document, private photograph, unpublished design, or project containing protected intellectual property may be small enough for email or messaging but too sensitive to leave with another storage provider unnecessarily. You need to deliver it to one known person while limiting where additional copies are created. WolfP2P streams the accepted file bytes between the two browser peers without creating a hosted middle copy, while still requiring you to verify the recipient and trust both endpoints.
Why WolfP2P fits
WolfP2P sends the selected file over a browser-provided encrypted peer-to-peer connection. Its coordination server helps the browsers connect but does not receive, read, store, or relay the file bytes.
That avoids an intermediary file copy on WolfP2P's server and reduces the number of services entrusted with the file. The invitation can travel through a private message or another trusted channel without attaching or uploading the sensitive file itself. There is also no transfer application to install or account to create.
The first browser that successfully joins takes the tunnel's open peer role. Once both roles are occupied, additional attempts to use the invitation are refused, so another party cannot join the live tunnel and receive the offered file. An interrupted participating browser can reclaim its reserved role during supported recovery.
“Private” does not mean consequence-free or anonymous. Send only files you are authorized to transfer, confirm the person at the other end, and use an organization-approved system instead when policy requires identity assurance, revocation, audit evidence, data-loss prevention, or controlled retention.
Before you start
Connection discovery helps the browsers connect directly across different networks. Some networks still prevent a connection, and there is no relay fallback. See connection requirements. Keep both computers online until the transfer finishes. Keep WolfP2P open on both computers until the transfer finishes. Make sure the receiving computer can save the files and has enough free space.
How to share the sensitive file
Check before sharing
Make sure you have permission to share the files. Contact the receiver by phone or a messaging app you trust.
Share the invitation privately
When the receiver is at his computer, create the invitation. Share the link or six-character code only with the receiver, by phone or a messaging app you trust. Ask the receiver to join promptly.
To intercept your invitation, an attacker would have to cycle through 1,073,741,824 possible codes — and do so within the limited window of time between the tunnel's creation and the receiver joining it. Although WolfP2P has measures to limit brute-force attempts, the short window duration further reduces the risk.
Confirm the right person joined
Once the receiver joins and the tunnel is occupied at both ends, no one else can join it. Using your phone or a messaging app you trust, verify that the person who connected is indeed the intended receiver of the invitation.
Choose the files
Select the files you want to send. Ask the receiver to check the file list, choose where to save the files, and accept.
Keep both computers on
Keep both computers online and WolfP2P open until the transfer finishes. Ask the receiver to check the received files. Follow any rules that apply to keeping or deleting sensitive files.
For the complete sequence, see How WolfP2P Works. For the coordination boundary, see What WolfP2P's Server Sees.
One browser tab represents one tunnel. Reloading or browser-restoring the same tab can resume its session, but genuinely closing the tab ends that session.
Home or workplace network rules may affect whether the computers can connect. If you are unable to connect, see connection requirements for sending files remotely.
You still rely on WolfP2P to connect the browsers correctly. Confirm the recipient through a phone call or another trusted channel; WolfP2P does not independently prove who is using the other browser. Read the technical trust limits.
WolfP2P does not independently verify the receiver's real-world identity. Anyone who obtains a valid invitation before the intended receiver joins may attempt to use it, so share it privately and create a new tunnel if it may have been exposed.
Transport encryption does not protect a file after either endpoint opens or stores it. WolfP2P cannot prevent the receiver from retaining, copying, or redistributing the delivered file, and it does not scan files for malware or enforce access policy, audit records, data-loss prevention, or regulated retention. Use an organization-approved managed system when those controls are required.
Questions and answers
Can WolfP2P read the sensitive file?
WolfP2P's coordination server does not receive the file-data channel, so it cannot read the transferred file contents. The sender's and receiver's browsers necessarily process the readable bytes at their endpoints.
Is the connection encrypted by WolfP2P?
Your browsers provide the encryption that protects files on the connection. WolfP2P uses that built-in protection. Read how encryption works for the technical details and limits.
Does private transfer prove who received the file?
WolfP2P refuses additional newcomers after the first receiving peer successfully joins using the invitation link or tunnel code. However, WolfP2P does not currently provide accounts, verified identities, or an independent fingerprint comparison. The first successful joiner could be someone who obtained the invitation without authorization, so confirm the intended person separately before offering the file.
Can someone reuse the invitation after the receiver joins?
Not to enter the occupied live tunnel. Once both peer roles are held, additional join attempts are refused. A participating browser may reclaim its own reserved role after an interruption; that recovery does not give a third party another place in the tunnel.
Does WolfP2P keep a copy for later download?
No. Both computers must be online simultaneously because WolfP2P does not hold the file for later delivery. Use a managed or hosted service when delayed download, revocable access, or an audit trail is more important than avoiding intermediary storage. Compare direct transfer with a hosted sharing link for that decision.