You try to upload an image to a Discord channel, but the upload fails with a red banner that says Network Error. This error usually appears when Discord cannot complete the upload to its content delivery servers. The most common reasons are a blocked or unstable internet connection, a file that exceeds Discord’s size limits, or interference from a VPN or antivirus program. This article explains the technical causes behind the Network Error on image uploads and provides the steps to identify and resolve each one.
Key Takeaways: What Causes Discord Network Error on Image Upload
- Internet connection stability: A weak or intermittent connection can interrupt the upload before it finishes.
- Discord file size limit: Free users have an 8 MB limit; files larger than this trigger a network error.
- VPN or proxy interference: Some VPNs and proxies block or throttle Discord’s upload servers.
Why Discord Shows Network Error When Uploading Images
The Network Error message indicates that Discord’s client could not transfer the image file to its content delivery network. The root cause is almost never a problem with Discord’s servers themselves. Instead, the error originates from the connection between your computer and Discord’s upload endpoints. When you upload a file, Discord sends it in chunks over HTTPS. If any chunk fails to reach the server within the timeout period, the entire upload fails and the client displays Network Error.
Three main technical factors cause this failure:
Unstable or Throttled Internet Connection
Uploads require a steady stream of data. If your internet connection drops packets or has high latency, the upload can time out. Wi-Fi interference, ISP throttling, or a saturated local network can all cause packet loss. Discord’s upload process does not resume from the point of failure; it restarts from scratch, so even a brief interruption can cause the error.
File Size Exceeds the Server’s Upload Limit
Discord enforces a maximum file size per upload. For free users on a standard server, the limit is 8 MB. If you try to upload a 10 MB image, Discord’s client will attempt the upload but the server will reject it after receiving too much data. The client then interprets the rejection as a network failure and shows Network Error. Users with Discord Nitro Basic have a 50 MB limit, and Nitro Classic or Nitro subscribers have a 500 MB limit. Server-specific boosts can also increase the limit for all members of that server.
VPN, Proxy, or Firewall Blocking the Upload
Virtual private networks and proxy services route your traffic through an intermediary server. Some of these servers block or rate-limit traffic to Discord’s media CDN. Corporate or school firewalls may also block the specific ports or domains that Discord uses for file uploads. When the connection to the CDN is interrupted by the intermediary, the upload fails with Network Error.
Steps to Identify and Fix the Network Error on Image Upload
Follow these steps in order. Test an image upload after each step to see if the error is resolved.
- Check your internet connection stability
Open a command prompt or terminal and runping -n 20 8.8.8.8on Windows orping -c 20 8.8.8.8on macOS. Look for any “Request timed out” or packet loss above 1 percent. If you see packet loss, restart your router and modem. If the problem persists, contact your internet service provider. - Verify the file size
Right-click the image file and select Properties on Windows or Get Info on macOS. If the file size is larger than 8 MB and you are on a free Discord plan, the upload will fail. Resize the image using a tool like Paint or Preview to bring it under 8 MB. For frequent large uploads, consider upgrading to Discord Nitro. - Temporarily disable your VPN or proxy
Turn off any VPN client or proxy service. On Windows, go to Settings > Network & Internet > Proxy and turn off “Use a proxy server.” On macOS, go to System Settings > Network > select your active connection > Proxies and disable all proxy types. Try uploading the image again. If the upload succeeds, the VPN or proxy was the cause. Configure your VPN to exclude Discord traffic or switch to a different VPN server. - Disable antivirus or firewall temporarily
Some security software scans HTTPS traffic and can interfere with uploads. Temporarily disable your antivirus real-time protection or your firewall. On Windows Defender, go to Virus & threat protection > Manage settings and turn off Real-time protection. Attempt the upload. If it works, add Discord to the antivirus exclusion list or the firewall allowed apps list. - Flush DNS and reset network stack
On Windows, open Command Prompt as administrator and runipconfig /flushdnsfollowed bynetsh int ip resetandnetsh winsock reset. Restart your computer. This clears corrupted DNS entries and resets network protocols that may be blocking the upload. - Change Discord voice region or use a different server
If the issue occurs only on one server, the server’s upload region may be having problems. The server owner can change the voice region in Server Settings > Overview > Server Region. Alternatively, try uploading to a different Discord server to isolate the issue.
If Discord Still Shows Network Error After the Main Fixes
Some less common causes can produce the same error. Check these scenarios if the basic steps did not help.
Image File Is Corrupted or Has an Unsupported Format
Discord supports JPEG, PNG, GIF, BMP, and WebP images. If the file is corrupted or saved with an unusual extension, the upload may fail. Open the image in a photo viewer to verify it displays correctly. If it does not, save a new copy from the source or convert it to JPEG or PNG using an image editor.
Discord Client Cache Is Full or Corrupted
A corrupted cache can interfere with uploads. Clear the Discord cache by closing Discord completely, then navigating to %appdata%/discord/Cache on Windows or ~/Library/Caches/discord on macOS. Delete all files in the Cache folder. Restart Discord and try uploading again.
Windows or macOS System Time Is Incorrect
HTTPS connections rely on accurate system time for certificate validation. If your system clock is off by more than a few minutes, Discord may reject the upload. On Windows, go to Settings > Time & Language > Date & Time and turn on “Set time automatically.” On macOS, go to System Settings > General > Date & Time and enable “Set date and time automatically.”
Discord File Upload Limits: Free vs Nitro vs Server Boost
The table below shows the maximum file size you can upload based on your Discord plan and server boost level. All limits apply to image, video, and file uploads.
| Plan / Boost Level | Maximum File Size | Notes |
|---|---|---|
| Free (no Nitro) | 8 MB | Standard limit for all free users |
| Nitro Basic | 50 MB | Paid subscription tier |
| Nitro Classic or Nitro | 500 MB | Full Nitro subscription |
| Server Boost Level 1 | 100 MB | Requires 2 boosts on the server |
| Server Boost Level 2 | 250 MB | Requires 7 boosts on the server |
| Server Boost Level 3 | 500 MB | Requires 14 boosts on the server |
Now you know the three main causes of the Discord Network Error on image upload: an unstable internet connection, a file that exceeds the upload limit, and interference from a VPN or firewall. Use the steps in order to isolate which cause applies to your situation. After fixing the error, test your upload speed at a site like speedtest.net to confirm your connection is stable. If you upload images frequently, consider upgrading to Discord Nitro Basic for the 50 MB limit or ask the server owner to add more boosts.