Everything you need
Powerful CSV tools that run entirely in the browser — free, fast, and private.
CSV Split
Break large CSV files into smaller chunks by row count or file size. Download parts individually or as a ZIP.
Try CSV Split →CSV Merge
Combine multiple CSV or XLSX files into one. Use simple stacking or define column mappings for files with different schemas.
Try CSV Merge →Excel Support
Upload .xlsx files just like CSVs. We handle the conversion automatically so you can focus on your data.
Instant Processing
Files are processed on high-speed infrastructure. No waiting around — results are ready in seconds.
No Sign-up Required
Everything runs on a secure session key. No account, no email, no passwords — just upload and go.
Up to 50GB Files
Chunked upload technology means even the biggest files upload reliably without timing out.