Document & Markup Converter
About Text File Splitter
The Large Text File Splitter divides massive text documents and log files into smaller downloadable chunks based on Line Count (e.g. 1,000 lines per file), File Size (e.g. 5 MB chunks), or Custom Delimiter Regex with 1-click ZIP archive download.
How to Use Text File Splitter
Step 1
Upload a text or CSV file, or paste text into the input box.
Step 2
Select split method (by Line Count, File Size, or Delimiter).
Step 3
Inspect the generated chunk list and individual file previews.
Step 4
Click "Download All (ZIP)" or download individual parts.
Practical Use Cases for Text File Splitter
Splitting Huge Server Logs for Text Editors
Split massive multi-gigabyte log files that crash desktop text editors into manageable 10,000-line chunks.
Batching CSV Data for Upload Limits
Split a 100,000-row CSV file into smaller 5,000-row chunks to satisfy third-party upload size limits while preserving headers.
Input & Output Examples
Splitting 300-Line File into 100-Line Chunks
File: 300 lines | Split by: 100 lines per file
Generated 3 files: `split_part1.txt` (100 lines), `split_part2.txt` (100 lines), `split_part3.txt` (100 lines) | Downloadable as ZIP
Key Features & Performance
- ✓Split by: Number of Lines, File Size (KB/MB), or Custom Delimiter regex (e.g. `=== CHAPTER ===`).
- ✓Header Preservation: optionally repeat the first header row (e.g. CSV headers) across every generated chunk.
- ✓1-Click "Download All as ZIP" via JSZip library.
- ✓100% Client-Side memory execution.
Key Terminology & Definitions
Chunking
Dividing a large contiguous dataset or file into smaller, fixed-size discrete units for easier processing and transfer.
Header Retention
Duplicating the first schema/header line across all child split files so each chunk remains a valid standalone dataset.