Why is my upload so slow and how can I speed it up?

4 min read · Updated 2026-11-13

Short answer

Upload speed is mostly set by your own internet connection's upload speed, which is often far lower than its download speed. Using a cable instead of Wi-Fi, moving closer to the router and pausing other uploads or backups usually helps most.

If your upload is crawling along, the bottleneck is almost always the upload side of your own connection. Many home broadband packages advertise a big download speed but offer only a fraction of that for uploads. A 3.8 GB folder that downloads in a couple of minutes can take far longer to send.

Pandafile upload at 38 per cent showing speed and time left, beside a chart comparing Wi-Fi far from the router, Wi-Fi near the router and an Ethernet cable
The speed and time left are shown under each upload.

Quick wins

  1. Plug in a network cable if you can. Ethernet is usually much faster and steadier than Wi-Fi.
  2. If you must use Wi-Fi, move closer to the router or avoid walls and floors between you and it.
  3. Pause cloud backups and sync apps (photo backup, file sync, video uploads) while you send.
  4. Ask others on the same connection to pause big uploads or video calls for a while.
  5. Close other tabs that are uploading or streaming.
  6. If you are on a VPN, try without it, as many VPNs slow uploads noticeably.

Leave it running safely

Large uploads are fine to leave going. Keep the Pandafile tab open and stop your computer from going to sleep. Uploads are resumable, so if the connection drops for a moment the upload continues from where it stopped instead of starting from scratch.

Is it Pandafile or my connection?

Run any online speed test and look at the upload figure. If our speed is close to that number, your connection is the limit and there is not much more to gain. If we are much slower than your speed test on several attempts, try another browser and another network, and if it persists email hello@pandafile.co with the speed test result and what you were sending.

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