Split large CSV files into smaller chunks by row count, file size, or column value.
CSV Splitter partitions one CSV file using one of three boundaries: a requested number of rows, a target file size, or the value in a selected column. It fits batch imports, attachment limits, and datasets that must be separated by an existing category. The common mistake is treating every text line as a CSV row. A quoted field may contain an embedded line break, so the number of logical records can differ from the newline count shown by a text editor.
Choose row-count mode when each batch must contain no more than a chosen number of records. Choose file-size mode when the destination is constrained by file size instead. The last chunk can be smaller because it contains the remainder. Row mode is the more direct control when an importer states a maximum record count.
Column-value mode groups records according to the contents of one selected field, so its outputs represent categories rather than equally sized batches. Inspect that field before splitting: blank values, inconsistent spelling, leading or trailing spaces, and capitalization can represent different CSV values. The file is processed in the browser and is not uploaded, which matters for large or sensitive exports.
No. In CSV, one record can occupy more than one physical line when a quoted field contains a line break. Treat CSV records, not newline characters, as the relevant unit. Also inspect how the header is represented before comparing the requested chunk count with the line count reported by a text editor.
Yes. Use column-value splitting when the source already contains the partition key, such as region_code or account_id. This is not a substitute for cleaning or mapping values: blanks, spelling variants, and unwanted spaces can produce unintended partitions. If several source values must share a new label, normalize that column before splitting.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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