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ERR_SSL_PROTOCOL_ERROR means Chrome received data it could not understand during a secure connection; it does not identify a single cause. Check whether the problem affects one website or several, then test the browser and network safely. The steps below help narrow down the fault without bypassing certificate warnings or weakening your security.
What causes ERR_SSL_PROTOCOL_ERROR?
Google defines the Chrome error as: “The page sent data that Chrome doesn’t understand.” Google Chrome Help describes a failed exchange, not a diagnosis. Causes can include a website’s configuration, device or network settings, browser extensions, or security software that inspects HTTPS connections.
Start with the scope of the problem. A failure on one site may be site-specific; failures across multiple sites may point to the browser, device, or network. These patterns are clues rather than proof.
Use these checks to narrow down the cause
- Check the site and address. Make sure the URL is spelled correctly, reload the page, and note whether other websites load.
- Compare browsers. Try the same address in another browser. If it fails only in Chrome or Edge, focus first on that browser. If it fails in multiple browsers, continue checking the device and network.
- Compare trusted networks. If available, try a different trusted connection. If the same site fails in multiple browsers and on different networks, report it to the site owner. If several sites fail across browsers while you are on one device or network, investigate local settings or contact the network administrator.
A browser or network test can help locate the problem, but it cannot by itself prove which component is responsible.
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#1 Best Overall
Sale
TP-Link USB to Ethernet Adapter,Support Nintendo Switch,1Gbps,Plug and Play
- 𝐇𝐢𝐠𝐡-𝐒𝐩𝐞𝐞𝐝 𝐔𝐒𝐁 𝐄𝐭𝐡𝐞𝐫𝐧𝐞𝐭 𝐀𝐝𝐚𝐩𝐭𝐞𝐫 - UE306 is a USB 3.0 Type-A to RJ45 Ethernet adapter that adds a reliable wired network port to your laptop, tablet, or Ultrabook. It delivers fast and stable 10/100/1000 Mbps wired connections to your computer or tablet via a router or network switch, making it ideal for file transfers, HD video streaming, online gaming, and video conferencing.
- 𝐔𝐒𝐁 𝟑.𝟎 𝐟𝐨𝐫 𝐅𝐚𝐬𝐭𝐞𝐫, 𝐌𝐨𝐫𝐞 𝐒𝐭𝐚𝐛𝐥𝐞 𝐃𝐚𝐭𝐚 𝐓𝐫𝐚𝐧𝐬𝐟𝐞𝐫𝐬- Powered via USB 3.0, this adapter provides high-speed Gigabit Ethernet without the need for external power(10/100/1000Mbps). Backward compatible with USB 2.0/1.1, it ensures reliable performance across a wide range of devices.
- 𝐒𝐮𝐩𝐩𝐨𝐫𝐭𝐬 𝐍𝐢𝐧𝐭𝐞𝐧𝐝𝐨 𝐒𝐰𝐢𝐭𝐜𝐡- Easily connect your Nintendo Switch to a wired network for faster downloads and a more stable online gaming experience compared to Wi-Fi.
- 𝐏𝐥𝐮𝐠 𝐚𝐧𝐝 𝐏𝐥𝐚𝐲- No driver required for Nintendo Switch, Windows 11/10/8.1/8, and Linux. Simply connect and enjoy instant wired internet access without complicated setup.
- 𝐁𝐫𝐨𝐚𝐝 𝐃𝐞𝐯𝐢𝐜𝐞 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲- Supports Nintendo Switch, PCs, laptops, Ultrabooks, tablets, and other USB-powered web devices; works with network equipment including modems, routers, and switches.
How to fix the error in Chrome
- Confirm the connection. Check that Wi-Fi or Ethernet is working. On public Wi-Fi, complete the network’s sign-in page before retrying. Restart the modem or router only if the broader connection appears to be affected.
- Update and restart Chrome. Install any available browser update, then close and reopen Chrome before testing the site again.
- Test in Incognito. Open the affected address in an Incognito window. If it loads there, an extension may be involved. Disable extensions, then turn them back on one at a time while testing to identify the one causing the problem.
- Check your device’s date and time. If you also see a certificate or date warning, make sure the computer’s date, time, and time zone are accurate.
- Check HTTPS inspection cautiously. Some antivirus products inspect encrypted web traffic, and managed work or school networks may use HTTPS inspection. If appropriate, use only a brief diagnostic test of the antivirus product’s HTTPS-scanning feature, then restore protection. If the result changes, consult the security vendor for its supported configuration. For a managed device or network, contact IT; Google warns that installing a certificate yourself may create a security risk.
- Escalate based on the pattern. If the problem remains limited to one site, contact its owner. If several sites fail across browsers, investigate the device or network, or ask the network administrator.
How to troubleshoot the error in Edge
Microsoft’s guidance covers general Edge and loading problems, not a dedicated fix for ERR_SSL_PROTOCOL_ERROR. These are general browser and network troubleshooting steps, so clearing data or repairing Edge is not a guaranteed cure for this particular code.
- Update Edge and restart the browser, then try the page again.
- Clear cached browsing data as a browser-isolation step. If the error persists, do not assume the cache was the cause.
- Test the address in another browser and, if possible, on another trusted network to see whether the failure follows Edge, the device, or the connection.
- Check the network. If other pages or services are also affected, verify the connection; restart the modem or router only if the wider network appears to have a problem.
- Repair Edge if Edge itself continues to malfunction after the simpler checks. If only one website continues to fail, report the problem to its owner.
What to do about certificate warnings
A certificate warning can indicate that a site’s certificate is invalid, expired, or self-signed. Microsoft advises against using a page with an invalid certificate for sensitive activity. Do not enter passwords, payment details, or other sensitive information on a page flagged as having an invalid certificate or insecure connection. Contact the site owner if you need to use the site.
Rank #2
Amazon Basics USB 3.0 to 10/100/1000 Gigabit Ethernet Internet Adapter, Compatible with Windows and macOS, Black
- Connects a USB 3.0 device (computer/laptop) to a router, modem, or network switch to deliver Gigabit Ethernet to your network connection. Does not support Smart TV or gaming consoles (e.g.Nintendo Switch).
- Supported features include Wake-on-LAN function, Green Ethernet & IEEE 802.3az-2010 (Energy Efficient Ethernet)
- Supports IPv4/IPv6 pack Checksum Offload Engine (COE) to reduce Cental Processing Unit (CPU) loading
- Compatible with Windows 8.1 or higher, Mac OS
- Do not bypass a certificate warning to reach the page.
- Do not install an unfamiliar root certificate to make the warning disappear.
- Do not permanently disable antivirus or firewall protection.
- Do not change experimental TLS or SSL browser settings as a general fix.
When to contact the site owner or administrator
- Contact the site owner when the same site fails in multiple browsers and on different networks, or when a certificate warning persists on that site.
- Contact your network administrator when multiple websites fail across browsers on a work, school, or otherwise managed network, or when HTTPS inspection may be involved.
- Focus on your device or network when multiple sites fail across browsers but work from another trusted network or device.
For Edge-specific general troubleshooting, see Microsoft’s guidance on what to do if Microsoft Edge isn’t working. For browsing safely around certificate issues, see Microsoft’s secure browsing guidance.
Quick Recap
Bestseller No. 2
Bestseller No. 4
Best Value
![BENFEI USB 3.0 to Ethernet Adapter, USB C to RJ45 Gigabit LAN (1000Mbps) Network Adapter, Compatible with MacBook/Pro/Air, Surface Pro, Windows 11/10/8/7, Mac OS [Aluminium Shell&Nylon Cable]](https://m.media-amazon.com/images/I/41fk9DHmdwL._SL160_.jpg)
BENFEI USB 3.0 to Ethernet Adapter, USB C to RJ45 Gigabit LAN (1000Mbps) Network Adapter, Compatible with MacBook/Pro/Air, Surface Pro, Windows 11/10/8/7, Mac OS [Aluminium Shell&Nylon Cable]
- COMPACT DESIGN - The compact-designed portable BENFEI USB A/C to Ethernet adapter connects your computer or tablet to a router,modem or network switch for network connection. It adds a standard RJ45 port to your Ultrabook, notebook or Macbook Air for file transferring, video conferencing, gaming, and HD video streaming.
- SUPERIOR STABILITY - Built-in advanced IC chip works as the bridge between RJ45 Ethernet cable and your USB A/C devices. The driver-free installation with native driver support in Chrome, Mac, and Windows OS; The USB A/C Ethernet adapter dongle supports important performance features including Wake-on-Lan (WoL), Full-Duplex (FDX) and Half-Duplex (HDX) Ethernet, Crossover Detection, Backpressure Routing, Auto-Correction (Auto MDIX).
- INCREDIBLE PERFORMANCE - Supports full 10/100/1000Mbps gigabit ethernet performance over USB A/C's 5Gbps bus, faster and more reliable than most wireless connections. Link and Activity LEDs. USB powered, no external power required. Backward compatible with USB 2.0/1.1.✅ To reach 1Gbps, make sure to use CAT6 & up Ethernet cables.
- BROAD COMPATIBILITY - The USB A/C-Ethernet adapter is compatible with Windows 11/10/8.1/8/7/Vista/XP, Mac OSX 10.6/10.7/10.8/10.9/10.10/10.11/10.12, Linux kernel 3.x/2.6, Android and Chrome OS.Compatible with IEEE 802.3, IEEE 802.3u and IEEE 802.3ab. Supports IEEE 802.3az (Energy Efficient Ethernet).❌Do Not Support Windows RT. (NOT compatible with Nintendo Switch.)
- 18 MONTH WARRANTY - Exclusive BENFEI Unconditional 18-month Warranty ensures long-time satisfaction of your purchase; Friendly and easy-to-reach customer service to solve your problems timely.
Rank #4
Anker USB C to Ethernet Adapter, Portable 1 Gbps Network Hub
- The Anker Advantage: Join the 65 million+ powered by our leading technology.
- Instant Internet: Connect to the internet instantly from virtually any USB-C 3.0 device, and enjoy stable connection speeds of up to 1 Gbps.
- Lightweight and Compact: The space-saving and portable design measures just over half an inch thick and weighs about the same as a AA battery.
- Premium Build: Features a sleek aluminum exterior and braided-nylon cable to complement the design of high-end devices.
- What You Get: PowerExpand USB-C to Gigabit Ethernet Adapter, welcome guide, 18-month worry-free warranty, and friendly customer service.
Rank #3
USB A/C to Ethernet Adapter, 3xUSB3.0 and 1000M RJ45 Network hub for Laptop
- [Expansion Ports] The USB C to Ethernet Adapter expands the device to three USB 3.0 ports and one Gigabit Ethernet port. Provides you more peripheral ports while maintaining a stable network connection, plug and play, no driver required.
- [Gigabit Network Port] ALL-LUCKY USB Ethernet Adapter transmission rate up to 1000Mbps, also compatible with 10/100Mbps bandwidth. It allows you to enjoy a smooth and stable network connection and avoid too much lag. (Note: To reach 1Gbps, please use CAT6 or above Ethernet cable connection)
- [Convertible Connector]This usb hub with ethernet not only has USB-A connector, but also can be converted to USB-C connector, so that you can easily convert the connector according to the device port, improve the convenience of use.
- [High-Speed Data Transfer] The usb to ethernet adapter adopts USB 3.0 transmission technology, supports up to 5Gbps transmission rate, and is compatible with USB 2.0(480Gbps),USB 1.0(12Mbps), easily transfer video, files and other data for you in seconds. (Note: Maximum output current is 900mA, does not support charging devices.)
- [Widely Compatible]The usb c ethernet adapter for iMac, MacBook Pro, iPad Pro, XPS and many other devices. Compatible with Windows 11/10/8.1/8, Mac OS, iPad OS, Chrome OS.（Note: Driver is required on Win 7） It can be used in office, school, library and other occasions, compact and portable, easy to carry around.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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