Turbo CSV Splitter

Turbo CSV Splitter is a dedicated CSV splitter, CSV merger, and column profiler built for large, unwieldy CSV exports. It processes everything locally on your computer, no uploads, no cloud services, no file-size limits, no waiting queues, making it ideal for data analysts, developers, e-commerce teams, and anyone who regularly hits Excel's 1,048,576-row wall.

As a complete CSV file splitter for Windows 11 and Windows 10, it supports splitting by row count, file size, column value, date, alphabet, duplicate status, equal parts, or random shards, nine methods in total, so you can split a CSV by rows for spreadsheet-friendly chunks, split a CSV by column for one-file-per-category exports, or generate random shards for machine-learning train/test/validation splits.

Everything streams row by row rather than loading the whole file into memory, so multi-GB and 100 GB+ CSV files are supported as long as there's enough free disk space for the output. Delimiter and encoding default to Auto, detected from the file itself, and Preview reports total row count, detected columns, ragged-row warnings, sample rows, and an estimate of output files before you commit.

Column tools let you keep only certain columns, drop others, rename headers, or add a row-number column, and filters range from a simple point-and-click selector to an advanced Python-expression option. Remove Duplicate Rows drops exact duplicates compared across all columns, and sorting orders the result by a column, all applied before the split runs.

It's also a full-featured CSV merge tool and CSV column profiler in one lightweight desktop install, with no separate scripts, notebooks, or web apps required. The Merge tab combines two or more files, including previously split parts, back into one with the header written once, optionally tagging rows by source file, removing duplicates, and sorting. The Profile tab reports per-column data quality: non-null and blank counts, distinct values, min/max text length, and numeric min, max, and mean, flagging ragged rows and exporting the report to a text file.

A live status bar shows progress, speed in rows per second, and an ETA. Cancel a job at any time and a checkpoint file saved in the output folder lets you resume exactly where you left off. Output can be left uncompressed, zipped or gzipped per part, or bundled into a single archive, sped up by a 1-128 parallel worker slider. License activation verifies your email and key once against Gumroad, then caches locally so the app works entirely offline afterward. Delimiter and encoding both default to Auto and are detected directly from the file itself, so you only need to touch them in the rare case detection gets something wrong, an unusual delimiter or a legacy encoding, for example. This makes the tool equally useful for data analysts working with irregular exports, developers automating a recurring pipeline step, e-commerce teams distributing catalog data by category, and anyone else who regularly runs into the practical limits of opening a large CSV file directly in a spreadsheet program.

1. Install Turbo CSV Splitter on your Windows 10 or Windows 11 PC.
2. Activate your license once, with a brief internet connection.
3. On the Split tab, browse to or drag and drop your CSV file.
4. Choose your output folder and confirm delimiter and encoding.
5. Apply column tools, filters, sorting, or deduplication if needed.
6. Choose one of the nine split methods and its setting.
7. Run Preview, then click Start Split and monitor live speed and ETA.
8. Use the Merge or Profile tabs for further work once split.
9. Adjust the parallel worker slider (1-128) if compressing many output parts.
10. Check the status bar for the final row count and file count summary.

• Nine split methods: rows, size, column value, date, alphabet, duplicates, unique, equal parts, random shards
• Streaming engine handles multi-GB and 100 GB+ files
• Column tools, simple and advanced filters, sorting, deduplication
• Merge tab combines files back into one, Profile tab reports data quality
• Preview, live speed, ETA, and checkpoint-based resume
• 1-128 parallel worker slider for output compression
• Runs fully offline after license activation, one-time purchase
• One-time purchase for Windows, with Gumroad license activation
• Compression options: uncompressed, per-part ZIP/gzip, or a single bundled archive
• Works with files on local drives, external drives, and network shares