Frequently asked questions
Is Peerxfer really free?
Yes, 100% free. No sign-up, account or credit card is needed. Ads may be shown on the page to keep the site running.
Is there a file size limit?
Peerxfer itself has no size limit. In practice the limit is the receiver’s free disk space and both sides’ internet speed. For files of 10 GB and more, Peerxfer automatically uses part-by-part saving on the receiving side.
Are my files stored on a server?
No. File bytes do not pass through the Peerxfer server; they flow directly between the two browsers. The server only relays small signaling messages so the two sides can find each other.
Is the transfer secure?
The transfer is encrypted with WebRTC/DTLS and additionally authenticated with your password. The password is never sent to the server. Use the generated 10-character password and share the link and the password through separate channels.
What if the receiver enters the wrong password or I forget it?
With a wrong password the receiver cannot connect. After too many wrong attempts on one room, the session is closed for security and you need to create a new link.
Which browsers work?
Up-to-date Chrome or Edge is recommended for sending. Desktop Chrome/Edge is the most compatible option for receiving, and receiving a folder is only possible with desktop Chrome/Edge. Some features may be limited in other browsers.
Can I use it on a phone?
Yes, open the link or the QR code on the phone and enter the password. Peerxfer tries to keep the screen awake during the transfer. For very large files a computer is more reliable.
What happens if the sender closes the tab?
The transfer stops. The sender’s tab must stay open. For files over 10 GB the receiver can resume where it left off once the sender reopens the same link.
If the connection drops, does the file start over?
No. If the network breaks, both sides reconnect automatically for up to 10 minutes and continue from the last verified point.
Can I send several files or a folder at once?
Yes. You can select multiple files or one folder; subfolders are preserved. Empty folders are not sent. When a transfer ends, “Start a new transfer” gives you a fresh link and password for the next file.
How long does a link stay valid?
If nobody has connected yet, the room is deleted after at most 4 hours. When the sender closes the tab the link stops working.
Why does the connection fail on some networks?
A direct connection depends on what the networks allow. Very strict firewalls or some corporate networks can block it. Trying another network, such as mobile data, usually solves it.
How do I report abuse?
Write to abuse@peerxfer.com or see the Report abuse page.
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