Excel & Data Tools

Tools for wrangling
spreadsheets and data

Merge CSV files, clean up messy spreadsheets, combine Excel workbooks — all free, no login, runs entirely in your browser.

✓ No sign-up ✓ Runs in browser ✓ Data stays local ✓ 100% free

Excel Sheet Merger

Merge multiple .xlsx files into one. Matching sheets appended, unique sheets carried over.

Merge multiple CSV files into one. Columns matched by header, duplicates optional.

Merge multiple TSV files into one tab-separated file. Columns matched by header, duplicates optional.

CSV Cleaner New

Remove duplicates, trim whitespace, and fix common formatting issues in CSV files.

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Column Deduplicator Soon

Paste a list of values and remove duplicates instantly. Case-sensitive or insensitive.

About Excel & Data Tools

Spreadsheet tools built for data workers

These Excel and data tools are part of ToolTab — a free collection of browser-based utilities for marketers, PPC managers, and data workers.

Whether you're combining weekly CSV exports, cleaning up a messy spreadsheet, or merging workbooks from different teams — everything runs locally in your browser. Your data never leaves your device.

Principles

🔒 Privacy first

Your files and data never leave your browser. Everything runs locally. Read our Privacy Policy →

⚡ No friction

Open a tool, drop your files, done. No sign-up, no install, no waiting.

🔨 Built from real workflows

Every tool here came from a real problem — not a feature list.