CSV Splitter
Split large CSV files into smaller parts by row count or approximate size. Everything runs locally in your browser.
Split CSV file
Choose a CSV, TSV, or TXT file and create downloadable CSV parts.
Quick start
- 1
Upload a CSV file
Choose a CSV, TSV, or TXT file from your device. The file stays in your browser.
- 2
Choose split settings
Split by row count or approximate file size, and decide whether to repeat the header row in every part.
- 3
Create smaller CSV files
The splitter streams through the file locally and creates downloadable CSV chunks.
- 4
Download the parts
Download one part at a time or download all generated CSV files.
Data stays on your device
All splitting runs locally in your browser. Your file never leaves your device.
Use this CSV splitter when one large file is too big to open, upload, compress, or convert. Choose a row count or approximate size target, then download smaller CSV parts.
0 bytes
Data transmitted
Rows + size
Split modes
Yes
Works offline
Browser-side splitting
The file is processed locally on your device without server uploads.
Large-file friendly
The splitter streams through the file and only keeps one output part in memory.
Repeat headers
Keep the first row in every output file so each chunk stands alone.
Private by default
Use it for sensitive exports because no file content leaves your browser.
Does this CSV splitter upload my file?
No. The splitter runs locally in your browser. Your CSV file never leaves your device.
Can I split a CSV by rows?
Yes. Choose row mode and enter the number of data rows each output file should contain.
Can I split a CSV by file size?
Yes. Choose size mode and enter an approximate target size for each output part. The tool keeps rows intact, so exact sizes vary.
Will each split CSV include the header row?
By default, yes. Keep the header option enabled so every part can be opened or compressed independently.
Split Large CSV Files In Your Browser
Large CSV files can hit upload limits, spreadsheet row limits, or browser memory limits. ChatDB's CSV splitter streams through your file locally and creates smaller CSV chunks that are easier to open, compress, email, or convert.
Private CSV Splitting For Large Files
The split runs on your device, so sensitive rows never upload to a server. Keep headers in every output file when you want each part to work independently in spreadsheets, databases, or gzip compression workflows.