Claude on the web may occasionally run into an “it opens but you can’t chat normally” issue—for example, you can’t click into the input box, pasting does nothing, or keyboard shortcuts suddenly stop working. This article walks through troubleshooting from fastest to slowest, trying not to change your account or settings, so you can narrow the cause down to the browser, extensions, input method editor, or network. Follow the steps once, and it’s usually usable again within ten minutes.
First, do three quick self-checks to rule out temporary glitches
Step 1: Hard refresh the page: on Windows use Ctrl+F5, on Mac use Cmd+Shift+R—many front-end resource loading issues are fixed immediately. Step 2: Open an incognito window and log in again to verify whether cache, cookies, or extensions are causing interference. Step 3: Switch networks (e.g., from a corporate network to a mobile hotspot). If it works normally right away after switching, the issue is likely with a proxy, DNS, or gateway blocking; for this kind of Claude troubleshooting, prioritize checking the network first.
Can’t type in the input box / cursor doesn’t appear: most likely an extension or IME conflict
If the page scrolls but the input box can’t be focused, first temporarily disable extensions such as script blockers, ad blockers, privacy anti-tracking tools, page translators, or “immersive reading” tools, then re-enable them one by one to find the culprit. Next, check your input method: switch the Chinese IME to English (half-width), and try again after turning off features like cloud suggestions / quick phrases / clipboard enhancement. If the input box is visible but typing produces no response, logging out and back in often works too—this is the easiest step in Claude troubleshooting.
Paste fails / formatting gets messy / drag-and-drop does nothing: start with permissions and clipboard settings
If paste does nothing, first use the right-click menu “Paste” instead of the keyboard shortcut to rule out the key combo being taken over by the system or an extension. Then check in the browser’s site permissions whether “Clipboard / Pop-ups / Third-party cookies” are blocked; some strict modes make pasting, uploading, and drag-and-drop unstable. If pasting from a document tool causes layout issues, paste into Notepad first to remove rich text, then paste into Claude—this is usually much more stable.
Shortcuts stop working / Enter doesn’t send: confirm focus and keyboard mappings
When shortcuts suddenly stop working, the most common reason is that the page focus isn’t in the input box: click the input area once, then try Ctrl/Cmd+Enter or Enter. Next, check whether you have system-level key remapping software enabled, IME hotkeys, or browser shortcut extensions—they can hijack the send keys. If you want Enter to send but it becomes a line break, first confirm in the page settings whether the “send / newline” preference has been changed; this step is often overlooked in Claude troubleshooting.
Still not resolved: how to collect complete information before submitting feedback
If the issue only happens on a specific account or device, record three pieces of information: browser version, the list of enabled extensions, and reproduction steps (be as precise as possible about “what you clicked and what happened next”). If convenient, add a short screen recording or screenshots, and check in the browser’s developer tools whether there are obvious network request failures (such as being blocked or timing out). Submit feedback or contact support with this information, and communication will be much easier—making it more likely to pinpoint the root cause in one go.
