File Splitter - Free Online Tool

Use File Splitter

Enter your data below to use the File Splitter

📌 Try these examples:

RESULT

Last updated March 22, 2026

Common Use Cases

Sending large files via email (split to stay under attachment limits)
Uploading large files to cloud storage with size restrictions
Processing large CSV/log files in memory-constrained environments
Transferring large database backups over unreliable connections
Parallel processing of large datasets
Splitting large video files for upload to platforms with size limits

The File Splitter on TechConverter.me generates numbered chunks with checksums and ready-to-run reassembly scripts, making it easy to split any file and reconstruct it reliably on any platform.

Examples

Example 1: Splitting for Email Attachments

A 75 MB archive needs to be sent via email (25 MB limit per attachment):

Input: project-backup.zip (75 MB)
Split by: size
Chunk size: 24 MB (leaving room for email overhead)

Output:
  project-backup.zip.001  (24 MB)
  project-backup.zip.002  (24 MB)
  project-backup.zip.003  (24 MB)
  project-backup.zip.004  (3 MB)
  checksums.txt           (SHA-256 for each part)
  reassemble.sh           (Linux/macOS reassembly script)
  reassemble.bat          (Windows reassembly script)

Send parts 001-004 in separate emails.
Recipient runs reassemble.sh to reconstruct the original file.

Example 2: Splitting a CSV File by Line Count

A 10-million-row CSV needs to be processed in batches of 1 million rows:

Input: sales-data-2025.csv (2.3 GB, 10,000,000 rows)
Split by: line count
Lines per chunk: 1,000,000
Preserve header: yes

Output:
  sales-data-2025_part001.csv  (230 MB, rows 1-1,000,000, with header)
  sales-data-2025_part002.csv  (230 MB, rows 1,000,001-2,000,000, with header)
  ...
  sales-data-2025_part010.csv  (230 MB, rows 9,000,001-10,000,000, with header)

Each part is a valid, self-contained CSV with the header row included.
Process each part independently or in parallel.

Example 3: Splitting a Database Backup

Input: production-backup-2026-03-17.sql.gz (48 GB)
Split by: size
Chunk size: 1 GB

Output: 48 parts (production-backup-2026-03-17.sql.gz.001 through .048)

Transfer strategy:
  - Upload each 1 GB chunk independently
  - If a chunk fails, retry only that chunk
  - Verify checksums after all chunks are transferred
  - Run reassemble script to reconstruct the backup
  - Restore from the reassembled file

Advantage over single-file transfer:
  A failed 48 GB transfer requires restarting from 0 GB.
  A failed 1 GB chunk only requires retrying 1 GB.

Frequently Asked Questions

How do I use File Splitter?

Simply enter your data, click the process button, and get instant results. All processing happens in your browser for maximum privacy and security.

Is File Splitter free?

Yes! File Splitter is completely free to use with no registration required. All processing is done client-side in your browser.

Is my data secure?

Absolutely! All processing happens locally in your browser. Your data never leaves your device, ensuring complete privacy and security.