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DataMani — Free Data Manipulation Tools
Merge, split & convert Excel/CSV — zero uploads, zero cost
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.
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.
About DataMani — Free Data Manipulation Tools on Product Hunt
“Merge, split & convert Excel/CSV — zero uploads, zero cost”
DataMani — Free Data Manipulation Tools was submitted on Product Hunt and earned 0 upvotes and 2 comments, placing #147 on the daily leaderboard. 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.
On the analytics side, DataMani — Free Data Manipulation Tools competes within Privacy and Data & Analytics — topics that collectively have 16.9k followers on Product Hunt. The dashboard above tracks how DataMani — Free Data Manipulation Tools performed against the three products that launched closest to it on the same day.
Who hunted DataMani — Free Data Manipulation Tools?
DataMani — Free Data Manipulation Tools was hunted by Paulo Nakanishi. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of DataMani — Free Data Manipulation Tools including community comment highlights and product details, visit the product overview.
Paulo Nakanishi