DataMani — Free Data Manipulation Tools

Merge, split & convert Excel/CSV — zero uploads, zero cost

4 followers

Merge, split & convert Excel/CSV — zero uploads, zero cost

4 followers

Free, privacy-first web tools for Data Analysts. Merge Excel files, split CSVs, convert formats and more — all processing happens in your browser. No uploads, no signup.

Free

Launch tags:Privacy•Data & Analytics

Launch Team / Built With

Viktor.comAn AI coworker that actually does the work

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Maker

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DataMani is a free toolkit for Data Analysts who manipulate Excel and CSV files daily. All 6 tools run 100% in your browser. Files never leave your computer. Tools: 🔀 Merge Excel Files — union merge with different schemas, Source tracking ✂️ Split CSV — chunks + ZIP, configurable row count 📄 Convert Excel → CSV — multi-sheet exports as ZIP 🔧 CSV → JSON — one object per row, pretty-printed 🧹 Remove Duplicates — reports how many rows removed 🔄 Transpose CSV — swap rows and columns Why it's different: Most tools upload your data to a cloud server. DataMani processes everything in your browser RAM — nothing is stored, logged, or shared. Sensitive data (CPF, financial records, client lists) stays local. Built by a Senior BI Analyst who was tired of writing the same pandas script every week.

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4mo ago

@paulo_nakanishi The zero-upload angle is a strong pitch for anyone handling client data — that's usually the first question I get asked. What formats does it currently support beyond CSV/Excel?

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4mo ago

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