WolfP2PSend a file that is too large for email
For:All users
No technical knowledge required.Email and messaging services may reject a large file, impose an attachment limit, or replace the attachment with a hosted download link. That adds an upload step and may leave another stored copy with the provider. WolfP2P lets the sender stream the file to the receiver as part of one live transfer, without first completing a provider upload.
Why WolfP2P fits
WolfP2P sends the file directly between two browsers without an attachment-size ceiling imposed by email. Email or messaging carries only the invitation; the large file itself travels over an encrypted direct transfer channel.
This also avoids another provider-held copy and requires no transfer application or account. For original media handling, see Send a Large Video Without Compression.
This is most useful when the receiver is available now. Unlike an attachment or hosted link, the invitation does not contain the file and does not make it available for a later download after the sender leaves.
Before you start
The browsers need a direct network path. The current configuration gathers host candidates only, with no STUN traversal between separate private networks and no TURN file relay. Even a shared network can block the connection. Both peers must remain online while file bytes are moving. Complete folder preservation and disk-backed large-file handling require a Compatible Browser, such as current Chrome, Edge, or Brave, with the required capabilities confirmed by WolfP2P's live check. Keep both transfer tabs open until completion. Confirm that the receiver can write to the chosen destination and has enough free space for the transfer mode.
How to send the file
Ask the receiver to be available
Unlike an attachment or hosted download, this is a live handoff. Confirm that the other person can keep their computer online until the file arrives.
Create an invitation
Open WolfP2P on the computer containing the file, create a tunnel, and privately share its link or six-character code.
Select the oversized file
After the intended receiver joins, choose the file that the email or messaging service could not accept.
Review before accepting
The receiver checks the offered name and size, chooses a destination with enough space, and accepts the transfer.
If the browser refuses Documents or reports system files, create a subfolder inside Documents and select that instead. See folder permissions.
Complete the direct handoff
Keep both computers awake while the file moves, then confirm that the receiver can open the result before ending the tunnel.
See How WolfP2P Works for the complete transfer flow.
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.
Mid-file checkpoint resume requires the receiver to use Safe mode. Safe mode may need about twice the file's size in free disk space, and an interruption can require retransferring up to approximately 256 MB of the current large file.
Quick mode uses about the file's own size in free disk space and avoids checkpoint-copy overhead, but an interrupted current file restarts from its beginning.
A restrictive network may prevent a direct WebRTC connection. WolfP2P does not fall back to relaying file bytes through its server.
Use another method when the receiver needs to download later, several people need the same link, or the file must remain hosted online. Compare live large-file transfer with email delivery when availability after the sender leaves is the deciding factor.
Questions and answers
Does WolfP2P upload the large file first?
No. WolfP2P's server helps the browsers connect but does not receive, store, or relay the file bytes.
Can the receiver download the file later?
No. This is a live transfer, so both computers must remain online until it finishes. Use a hosted service when the receiver needs an asynchronous download.
Can an interrupted large file continue?
Safe mode can resume from a durable checkpoint on a compatible receiving browser. Quick mode restarts the interrupted current file. See recovery and reliability for the exact rules.