dataprep.dev
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dataprep.dev is a 100% local, pure-browser data processing engine designed to solve the biggest headaches in data preparation: Excel crashes and privacy risks.
Powered by cutting-edge DuckDB-Wasm technology, our toolkit brings database-level performance directly into your browser tab. Your data never leaves your device. No servers, no uploads, no GDPR headaches.
Stop fighting with bloated spreadsheet software. Clean locally, analyze anywhere.
JackHamr is the AI coding agent that ships software end-to-end. Instead of a single assistant that tries to do everything, it runs a team of specialist agents โ one writes the spec, another plans the implementation, others build, test, review, and ship the code. Each agent has its own role, tools, and personality.
Agents run on hosted cloud dev environments with VS Code, Docker, SSH access, and WireGuard-encrypted networking. Close your laptop and they keep working. Talk to them with push-to-talk voice chat or type naturally. GitHub is built in โ one-click clone, automatic branch-per-task, real-time commit sync, and PR creation.
Bring your own LLM keys (OpenAI, Anthropic, Google, or self-hosted) or use ours at cost โ swap models mid-pipeline to use the best model for each task. Build custom orchestration pipelines and agent skills. Share agents across your organization.
Pay-as-you-go with fully itemized billing โ infrastructure at cost, LLM tokens with zero markup. $10 free credit to start, no card required.
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dataprep.dev's answer
I was trying to clean up a massive, messy Shopify order export. Excel kept freezing, and I absolutely refused to upload sensitive customer emails to random online converters. I got so frustrated that I decided to stop complaining and build a local-first toolkit to solve my own workflow nightmare.
dataprep.dev's answer
1, Indie hackers and solo founders. 2, Boutique digital marketing agencies. 3, Privacy-conscious data freelancers.
dataprep.dev's answer
Most data tools force you to upload your CSVs to their servers. We don't. We compiled DuckDB into WebAssembly, meaning you get a blazing-fast, database-level engine running entirely inside your local browser tab. It's 100% private and works instantly.
dataprep.dev's answer
If you try to open a 2GB CSV in Excel, it freezes and crashes. If you use Python Pandas, you have to write code and manage environments. dataprep.dev gives you the power of code (SQL queries, regex, merging 50 files) with a simple drag-and-drop UI, without ever freezing your computer.
dataprep.dev's answer
E-commerce sellers flattening messy Shopify exports, performance marketers cleaning ad reports, and data analysts who need to anonymize PII (GDPR compliance) before feeding datasets to AI models like ChatGPT.
dataprep.dev's answer
DuckDB-Wasm is the core data engine handling the heavy lifting. The frontend is built with React/Next.js and styled with Tailwind CSS. It's a modern, serverless architecture.
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
GummySearch - Audience research for Reddit
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Brand24 - Brand24 is an AI-powered media monitoring tool that analyzes mentions and presents actionable insights.This tool is designed to keep track of online conversations about your brand, products, and competitors.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
F5Bot - F5Bot will send you an email whenever your brand, product, or keyword is mentioned online.