Send Large Files While Sleeping
Why Do Large Overnight Transfers Fail?
When you attempt to send large files while sleeping (like massive 4K video exports, heavy project folders, or full system backups) between devices, the transfer often takes hours. By default, most phones and laptops will turn off their screen and enter "sleep mode" or standby to save battery after a few minutes of inactivity.
When the screen sleeps, the operating system aggressively pauses background network activity. This instantly kills your ongoing file transfer. You wake up the next morning expecting the 100GB transfer to be complete, only to find it failed at 5%. Textunnel solves this by intentionally engaging a browser-level "Wake Lock" that forces the system network and screen to stay active until the last byte is delivered safely.
How to Transfer While Sleeping (3 Simple Steps)
- Drag your massive file: Drop your massive video or zip archive into the transfer box above to generate a secure P2P connection code.
- Notice the Green Indicator: You will immediately see the "Smart Wake-Lock Active" badge appear on the screen. This confirms your browser has successfully blocked the device from sleeping.
- Go to Sleep: Open the provided secure link on your receiving device (like your NAS or backup PC). Leave both browser tabs open. They will automatically stay awake, push the data at maximum local network speed, and finish the job while you rest.
Perfect for Heavy Production Workloads
Our anti-sleep transfer tool is highly recommended for users who deal with massive data and cannot afford transfer interruptions:
- Video Editors & Filmmakers: Sending 200GB raw RED camera footage from a laptop to a local editing server overnight.
- Data Hoarders & Backups: Migrating large photo libraries or system snapshots between old and new devices over the local network without babysitting the progress bar.
- 3D Artists: Moving massive render caches and asset libraries securely while the studio is closed.
Frequently Asked Questions
How do I send large files while sleeping without the transfer failing?
Textunnel automatically activates a 'Smart Wake-Lock' using modern browser APIs. As soon as you start a file transfer, it locks your screen to prevent it from going to sleep or dimming, ensuring your Wi-Fi connection remains stable overnight until the transfer completes.
Is there a limit on file size?
No! Because Textunnel uses true Peer-to-Peer (P2P) WebRTC connections, files are transferred directly between your devices over your local network. You can send 50GB, 100GB, or even larger video files without worrying about timeouts or artificial cloud limits.
Do I need to install an app or extension to prevent screen sleep?
No. Everything happens directly in your web browser. You don't need to change your system settings, install Chrome extensions, or download native apps. Just open this page, drag your file, and the browser handles the wake-lock.
Can I leave my laptop closed while transferring?
If you want to send large files while sleeping and physically close your laptop lid, you must ensure your operating system settings are configured to 'Do nothing' when the lid is closed. As long as the OS remains awake, our browser wake-lock will keep the network connection active for the transfer.
Is it secure to send files this way?
Yes, it is highly secure. Your files never touch our servers. They are encrypted end-to-end and sent directly over your local Wi-Fi or LAN. Even if you are transferring highly sensitive data while sleeping, it remains strictly between your two devices.
What happens if the Wi-Fi disconnects temporarily?
WebRTC P2P connections require a stable local network. If your Wi-Fi drops completely, the transfer may fail. However, the wake-lock drastically reduces the chance of Wi-Fi sleeping, which is the most common cause of dropped connections during massive background transfers.
How fast is the background transfer speed?
Because this is a true peer-to-peer connection, the transfer speed is dictated solely by your local router's capability, bypassing your ISP's upload and download limits entirely. On a modern 5GHz Wi-Fi network, you can easily achieve speeds exceeding 50MB/s, making it significantly faster than uploading to the cloud.
Does the wake-lock feature work on iOS and Android phones?
Yes, the browser-based wake-lock API is supported on modern Android devices via Chrome. On iOS devices (iPhone/iPad), Apple imposes stricter background restrictions, so we recommend keeping the Safari tab actively open on the screen while the transfer completes to ensure iOS does not suspend the process.
Explore our other secure, serverless transfer tools: