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Know exactly what every AI message costs — before you hit send. Tokenizer adds a small, non-intrusive overlay to your favorite AI chat interfaces. As you type, it shows a live token count, dollar cost estimate (input and output), and a running session total. No setup required — just install and start chatting. Live token counter that updates with every keystroke, so you always know the size of your prompt before sending it. Cost estimates based on current model pricing, broken down by input tokens, output tokens, and cumulative session spend. Cross-model comparison lets you see what the same prompt would cost across different AI models side by side. Word-level token breakdown with color-coded chips showing which words use the most tokens — helpful for optimizing long prompts. Energy usage estimates showing approximate watt-hours and CO2 per prompt, for users who care about the environmental impact of AI. Works with local AI tools running on localhost, including popular self-hosted setups. Everything runs 100% locally in your browser. There is no data collection, no accounts, no external servers. All token counting happens entirely on your device. Open source under the MIT License at github.com/gyeningcorp/tokenizer
Scroll
All your AI chats. One shortcut. Scroll is a local-first command palette for your AI chats. It passively indexes your ChatGPT, Claude, and Gemini conversations into a local database, so you can search, bookmark, and ask questions across all of them from any tab. IMPORTANT: Scroll indexes conversations as you visit them. Your chats won't all appear immediately. They build up as you use ChatGPT, Claude, and Gemini normally. The more you chat, the more Scroll has to search. The more you bookmark, the more Scroll has to answer questions with. Give it a few days of regular use. WHAT YOU CAN DO Search — Open the palette and start typing. Scroll searches across all three providers at once. Premium includes semantic search (search by meaning, not just keywords). Bookmark (Ctrl/Cmd + Shift + ; or press the cloud icon in the sidebar) — Save any conversation locally, or to the cloud (encrypted) with a premium account. Cloud bookmarks sync across devices. Ask your Library (?) — Type ? then a question. Scroll answers using your saved conversations, with citations. Free: 5/day. Premium: unlimited (subject to fair use). Ask a Provider (@) — Type @ to send a prompt to ChatGPT, Claude, or Gemini, or @All to broadcast to all of them at once. Each opens a new chat. (Tip: if you highlight text on any webpage before opening the palette, you can insert your selection as context when @'ing a provider.) Use as Context — Inject a past conversation into your current chat as context. Three formats: title summary, AI summary, or full transcript. Open palette .................. Ctrl/Cmd + ; Search ............................ Just type Ask your Library ............. ? then your question Ask a provider ................ @ then select Browse bookmarks ........ ; Navigate ......................... Arrow keys Select ............................. Enter or Tab Back ............................... Backspace Close .............................. Esc Bookmark chat............... Ctrl/Cmd + Shift + ; HOW SCROLL USES YOUR DATA When you visit ChatGPT, Claude, or Gemini, Scroll automatically reads and stores the full text of your conversations (prompts, responses, titles, and URLs) in a local database in your browser. This data stays on your device and powers local search, bookmarking, and export. No data is transmitted unless you create an account, at which point bookmarked conversations are synced to an encrypted cloud database and AI features (semantic search, Ask your Library) send conversation excerpts to OpenAI's API for processing. See our full privacy policy at tryscroll.app/privacy. Reach me at asker@tryscroll.app, @askerkurtelli on X, or join the Discord: https://discord.gg/xvaxhEhdm5 :)
Gemini Token Counter
Track characters and estimated tokens on Gemini in real-time with a beautiful UI. Empower your Google Gemini™ experience with strategic insights. "Gemini Token Counter" is a sleek, professional Chrome extension that tracks character counts and estimated token usage in real-time, helping you stay within model limits and maintain high-quality AI interactions. [Key Features] Real-time Tracking: Instant counting for both user queries and model responses as they appear. Smart Language Detection: Automatically switches calculation logic between Japanese and English for accurate token estimation. Image Awareness: Factors in estimated token consumption from attached images. Sleek "Glassmorphism" UI: A modern, high-end interface that blends perfectly with the Gemini theme. Draggable Interface: Move the counter anywhere on your screen. Includes a "Boundary Check" feature to prevent the counter from being lost off-screen. [How to Use] ①Install the extension. ②Open Google Gemini (gemini.google.com). ③The counter will appear automatically. Feel free to drag it to your preferred position! [Privacy First] We value your privacy. All calculations are performed locally within your browser. This extension does not collect, store, or transmit your chat data to any external servers.
TokenScope - ChatGPT Token Counter
Track token usage and context window space in ChatGPT. Supports all models: GPT-4o, GPT-4.5, and more. TokenScope is a lightweight Chrome extension that displays your current token usage and remaining context window directly inside the ChatGPT web UI. Features: - Live Token Counter: See how many tokens you've used and how many are left, right above the ChatGPT message input. - Accurate Tokenization: Uses OpenAI's official tokenizer for precise token counting that exactly matches the ChatGPT API. - Automatic Model Detection: Instantly detects which ChatGPT model you're using (including GPT-4o, GPT-4o with scheduled tasks, GPT-4.5, GPT-4o Mini, o3, o4-mini, and o4-mini-high) and adjusts the counter accordingly. - Supports All Major Models: Works with all current ChatGPT models, including new variants as they're released. - Visual Indicators: Color changes when approaching token limits to help you avoid hitting the maximum. - Seamless Integration: Blends into the ChatGPT interface with a clean, user-friendly design. - No Personal Data Collection: TokenScope does not collect or transmit any personal data. Why install TokenScope? - Avoid exceeding model limits and losing conversation history. - Instantly know if your prompt or conversation is getting too long. - Get exact token counts that match what OpenAI's API actually uses. - Great for power users, researchers, and anyone who wants to get the most out of ChatGPT. Keywords: ChatGPT token counter, context window tracker, OpenAI tokens, GPT-4o, GPT-4, token limit, token usage, chat history, AI token counter, ChatGPT extension, token calculator, context window size OpenAI and ChatGPT are trademarks of OpenAI. This extension is an independent project and not affiliated with OpenAI.
ChatGPT Timestamp
Displays timestamps for ChatGPT messages ⭐ Love it? Star the GitHub repo! → https://github.com/Hangzhi/chatgpt-timestamp-extension Follow long chats with ease ✨ A tiny fix for a big blind spot — once you try it, you’ll never go back. ➡️ Install now and make every message count.
