Data Slicer
Combine & divide huge files
Only for Mac
Free
Mac
Slice massive CSV exports into clean, upload-ready files — entirely on your Mac. No cloud, no accounts, no subscription. Your data never leaves your machine.
Slice massive CSV files into clean, upload-ready pieces — entirely on your Mac.
Data Slicer takes CSV exports that are too big for upload portals, spreadsheets, or downstream tools and splits them into files capped at exactly the row count you need — each one carrying the original header row, ready to use anywhere.
SPLIT BY ROW COUNT
Set any cap (default 100,000 rows). Data Slicer computes the split and shows you exactly what it will create — how many files, how the rows distribute — before a single byte is written. Confirm, pick a folder, done.
COMBINE, THEN SLICE
Add multiple CSVs with matching headers and they merge into one dataset with a single header row, then split to your cap. One file or twenty — same three clicks.
BUILT FOR REAL-WORLD CSVS
Comma, semicolon, tab, or pipe delimiters. UTF-8, UTF-16, and Windows-1252 encodings. Quoted fields with embedded commas and line breaks are handled correctly — the stuff that breaks naive splitters.
NOTHING LOST, NOTHING TOUCHED
Your source files are never modified, and existing files in your output folder are never overwritten. Every run verifies rows in = rows out, right in the completion summary.
YOUR DATA NEVER LEAVES YOUR MAC
Data Slicer requests no network access of any kind — under macOS sandboxing, the app is technically incapable of connecting to the internet. No accounts, no cloud, no analytics, no telemetry. Work with confidential exports in confidence.
MADE FOR BIG FILES
A streaming engine handles multi-million-row files with flat memory use and live progress. When it's done, drag finished files straight from the results panel into Finder, Mail, or Slack.
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The developer, Quack Quack Labs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Quack Quack Labs LLC
- Size
- 1.1 MB
- Category
- Utilities
- Compatibility
Requires macOS 14.0 or later.
- Mac
Requires macOS 14.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Quack Quack Labs LLC 2026