LLM Context Window Packer
Pack files and text into an LLM context window (128k/200k/1M tokens) with per-file toggles, token estimates, and XML-tagged output. Free and offline.
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What is LLM Context Window Packer?
LLM Context Window Packer loads files and text blocks, estimates token counts, and produces an XML-tagged bundle optimized for pasting into LLM chat interfaces. Per-file toggles let you include or exclude content, and the context window selector (128k/200k/1M) shows whether you fit.
Key Benefits
- Paste-ready bundles for chat interfaces without file upload
- Token estimates prevent context window overflow
- Per-file toggles make iteration fast and precise
- XML tagging helps LLMs distinguish between sources
- Everything runs locally - files stay on your device
Common Use Cases
- •Sharing code context with ChatGPT, Claude, or other AI assistants
- •Preparing documentation bundles for AI-powered code review
- •Combining research papers and notes for AI-assisted analysis
- •Packing project files for AI-assisted debugging sessions
How to Pack Files for LLM Context
- Load your files: Select the files you want to include, or add text blocks manually.
- Toggle and tune: Include or exclude files and watch the token count update against your chosen context window.
- Copy the bundle: Copy the XML-tagged bundle and paste it directly into your LLM chat interface.
Key Features
- Load multiple files or add inline text blocks
- Per-file include/exclude toggles for context curation
- Estimated token counts based on character length
- Context window selection: 128k, 200k, or 1M tokens
- XML-tagged bundle output ready for any chat interface
- 100% client-side - files never leave your device
Frequently Asked Questions
How are token counts estimated?
Tokens are estimated as character length divided by 4, which is a reasonable approximation for English text. Actual tokenizer output may vary by model.
Can I paste text directly instead of loading files?
Yes. Add a text block and type or paste content directly. It is treated the same as a loaded file.
What happens if I exceed the context window?
The tool highlights when the estimated tokens exceed your selected context window so you can remove files before pasting.
Is my content uploaded anywhere?
No. Everything is computed and bundled locally in your browser - files never leave your device.
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