Focused purpose
What this tool does
Split CSV locally by row count, part count, approximate bytes or column value. Repeat headers, preview ZIP contents and download without an account.
- ✓ Rows, parts, bytes or value modes
- ✓ Repeated header row
- ✓ Output manifest
- ✓ Lazy ZIP generation
Workflow
How to use it
- 01
Open the CSV and choose a split method.
- 02
Set the target and preview file names and counts.
- 03
Create and download the ZIP.
Available controls
Available options
- Rows per file.
- Requested number of parts.
- Approximate byte target.
- One file per column value.
Split contacts every two rows
Example before and after
The destination accepts at most two data rows per file.
Before
id,name 1,Ada 2,Linus 3,Grace 4,Ken 5,Margaret
After
contacts-part-001.csv: rows 1–2 contacts-part-002.csv: rows 3–4 contacts-part-003.csv: row 5
Expected result: Three CSV files with repeated headers are packaged in one ZIP.
Practical scenarios
Common use cases
Meet an import row limit.
Create regional files by country.
Send manageable chunks to teammates.
HONEST LIMITS
Important limitations
- iByte targets are approximate because CSV quoting affects final size.
- iFiles larger than browser storage may require streaming mode and fewer split choices.
FAQ
Questions about this tool
Can I split by file size?
Yes. The target is approximate and the preview shows estimated bytes before ZIP creation.
Will every part keep the header row?
Yes. Every generated CSV repeats the confirmed header.
Can the tool split a file larger than browser memory?
Streaming mode can handle sequential row splits when browser capabilities allow it; global grouping still needs memory.