JamPack

# [JamPack](https://jampack.vercel.app/)  **JamPack** is a lightweight macOS utility that merges any number of code files into a **single .txt file** — ideal for feeding large projects into AI assistants like ChatGPT, Claude, Gemini, or archiving cleanly. 🔗 [Click to download](https://jampack.vercel.app/) > ✅ **100+ Users have downloaded JamPack** > According to Google Analytics, JamPack has already helped over a hundred users streamline multi-file workflows for AI tools. --- ## 🚀 Why JamPack? AI models like GPT-4, Claude 3, and Gemini 1.5 have **context windows**, **file limits**, and **upload caps**: > • ChatGPT allows up to **10** files per upload and caps each text file at 2 M tokens[^gpt_files] > • Claude lets you attach **20** files per chat and still has a 200 K-token window[^claude_files][^claude_tokens] > • Even “long-context” models such as Gemini 1.5 (1-2 M tokens)[^gemini_tokens] or GPT-4o (128 K tokens)[^gpt_context] can choke on large multi-file projects. > JamPack flattens your project into a single, well-labeled text file, keeping filenames as in-file headers so the AI understands each part. **JamPack solves this.** It flattens your project into one `.txt` file while preserving: - **File structure** - **File names as readable headers** - **Language identity** So AI can still understand what's what — with **zero confusion.** --- ## ✨ Features - **Drag & Drop** multiple source files - **Reorder** files with simple drag handles - **Exclude unwanted files** individually - **One-click export** to a `.txt` file (named automatically) - **Streaming-based merge system** Efficient even with hundreds or thousands of files - Handles large content (gigabyte-scale) with **minimal memory** - **Output file is auto-copied to clipboard** - **Choose save location** (default: Downloads folder) - **Instant folder opening** after merge - **Rejects unsupported file types** (e.g., images, binaries) --- ## ⚙️ How It Works (Tech Details) JamPack uses a **streaming I/O model** under the hood: - Instead of reading all files into memory at once, it uses `FileHandle` to process each file **in chunks** (32KB at a time). - This chunked reading and writing prevents memory crashes on large merges. - Files are prefixed and suffixed with Markdown-style code blocks (` ```filename `) for readability. - The final merged `.txt` is stored efficiently and copied to your clipboard. - You can also **automatically open** the save folder after export. This makes JamPack ideal for merging: - Large repositories - Notebook exports - Educational codebases - Long chat history logs --- ## 📄 Supported Languages JamPack supports virtually all common code formats: HTML, CSS, JavaScript, TypeScript, Python, Swift, Java, C, C++, C#, Go, Rust, PHP, Ruby, Kotlin, Lua, SQL, Perl, Scala, Sass, Vue, and more. > ⚠️ Unsupported files like images, videos, or binaries are safely rejected. --- ## 💾 Installation 1. Download **[JamPack.dmg](https://jampack.vercel.app/)** 2. Open the `.dmg` 3. Drag **JamPack** into your **Applications** folder 4. Launch from **Launchpad** or **Spotlight** --- ## 🖥 Requirements - macOS 12 (Monterey) or later --- ## 📜 License MIT --- [^gpt_files]: OpenAI Help Center – “File uploads FAQ” <https://help.openai.com/en/articles/8555545-file-uploads-faq> [^gpt_context]: OpenAI API Docs – “GPT-4o” model card <https://platform.openai.com/docs/models/gpt-4o> [^claude_files]: Anthropic Help Center – “What kinds of documents can I upload to Claude.ai?” <https://support.anthropic.com/en/articles/8241126-what-kinds-of-documents-can-i-upload-to-claude-ai> [^claude_tokens]: Anthropic Help Center – “Maximum prompt length” <https://support.anthropic.com/en/articles/7996856-what-is-the-maximum-prompt-length> [^gemini_tokens]: Google AI Developers – “Long context” <https://ai.google.dev/gemini-api/docs/long-context>