How to Use the Claude Web App | Browser Features and Free Registration Guide

What Is the Claude Web App — The Official AI in Your Browser

The Claude Web App is the web version of Anthropic's AI chat service. Simply visit claude.ai in any browser, and it works across Windows, Mac, Linux, and Chromebook with no software installation required.

The web app syncs with the iOS/Android mobile apps and the Mac/Windows desktop apps under a single account. You can pick up a conversation from your PC and continue it on your smartphone, or carry your chat history seamlessly wherever you go.

The range of supported features is broad — text conversation, file attachments, image analysis, code generation, and web search all work within a single browser tab. For team use, integrations with Slack and Google Workspace are also available (source).

Creating a Free Account and Logging In

You can create a Claude Web App account and get started right away by following these steps:

1. Open your browser and go to https://claude.ai
2. Click "Sign up" or "Continue with Google"
3. If registering with an email address, click the confirmation link sent to your inbox
4. Agree to the age verification and terms of service
5. Once the chat screen opens, your registration is complete

No credit card is required. Signing in with a Google account skips the email confirmation step, so you can be up and running in about 30 seconds.

If you already have an account, simply click "Log in" and sign in with your email address or Google account. If you've forgotten your password, a reset link will be sent to your email.

Key Features Available in the Web App

The Claude Web App includes the following features (source):

Text Generation and Editing Writing, summarizing, translating, proofreading, and brainstorming are all available from the free plan.

File Attachments and Analysis Upload files such as PDFs, Word documents, Excel spreadsheets, and CSVs so Claude can read and analyze their contents. Useful for summarizing reports or analyzing tabular data.

Image Analysis Drag and drop an image file to have Claude describe its contents, extract text (OCR), or interpret charts and graphs.

Code Generation and Execution Generate, review, and debug code in any programming language. Output is formatted as code blocks with syntax highlighting.

Web Search Toggle "Web search" during a conversation to have Claude search for the latest information and respond with citations. Particularly useful when you need information beyond its knowledge cutoff.

Projects (Pro and above) Group multiple conversations into "Projects" with shared context, files, and custom instructions. Especially effective for ongoing, long-term work.

Memory (Pro and above) Remembers your preferences and background information across conversations, so you don't have to re-explain context every time.

Using the Free Plan and Its Limitations

Even on the free plan, you can experience Claude's core capabilities. The available model is Sonnet 4.6, covering basic tasks like text generation, file analysis, image analysis, and code generation.

However, there are usage limits. Once you exceed a certain number of messages per day, a notice will appear indicating you've reached the limit, and it will reset after a few hours. The exact cap is not publicly disclosed, but for light use, the free plan is more than sufficient.

Projects, memory, and priority support are not available on the free plan. Access to higher-tier models such as Opus 4.8 also requires a paid plan.

A practical approach is to start on the free plan, and upgrade to Pro once you start hitting the limits.

What Pro and Max Plans Unlock

Pro Plan ($20/month)

1. Unlimited use of the Projects feature
2. Cross-conversation memory becomes active
3. Priority access to higher-tier models like Opus 4.8
4. Significantly more daily messages than the free plan
5. GUI control of Claude Code via the desktop app

Max Plan ($100/month and up, $200/month and up)

1. Extended Thinking mode becomes available
2. Long-context processing (up to 1 million tokens) is enabled
3. More parallel sessions, allowing multiple heavy tasks to run simultaneously
4. Message limits expand to 5x (Max $100) or 20x (Max $200) compared to the free plan

Both plans can be purchased at claude.ai/upgrade via credit card or PayPal on a monthly basis. An annual payment option is not currently available (source).

Maintaining Context with the Projects Feature

The Projects feature, available on Pro and above, is one of the most productivity-enhancing features in the web app.

Create a project from "New project" in the left sidebar. Within a project, the following are shared:

• Custom instructions (a system prompt applied to all conversations)
• Shared files (the same documents can be referenced across multiple conversations)
• Multiple conversation threads (organized by topic)

For example, you could create a "Marketing Strategy Project," upload a competitor analysis PDF and your brand guidelines, and never have to re-explain them at the start of each conversation.

There is no limit on the number of projects, and you can freely create and delete them by purpose.

Choosing Between the Web App, Mobile App, and Desktop App

Claude offers multiple clients, and choosing the right one for each situation improves your efficiency.

Your conversation history syncs in real time across all clients. Projects created in the web app are accessible from the mobile app, and you can continue working in the desktop app seamlessly.

Frequently Asked Questions

Q. Can I use the web app from a smartphone?
Yes. Access claude.ai from the default browser on iOS or Android (Safari or Chrome), and it will display in a mobile-friendly layout. However, voice input and notification features are more convenient in the dedicated mobile app.

Q. How long is conversation history saved?
No explicit expiration is stated, but many users report history being retained for several months. It is recommended to manually copy and save any important exchanges.

Q. Can I switch the UI to Japanese?
The claude.ai UI automatically adapts to your browser's language settings. For conversations, simply write in Japanese and Claude will respond in Japanese — no additional setup is needed.

Q. Can I use multiple accounts?
You can switch between multiple accounts using your browser's profile feature or incognito/private windows. There is no official mechanism to maintain multiple accounts simultaneously within a single browser window.

Q. What is the difference from the API?
The web app is a no-code GUI for interacting with Claude. If you want to integrate Claude's capabilities into your own service or scripts, you would use the API — but for personal use and most productivity tasks, the web app is all you need.