Filter by Date Range CSV Files Online

How do I filter a CSV file to a specific date range?

Drop the file, choose the date column, set a start date, end date, or both using the date pickers, and click Filter by Date Range. Only rows where the date column falls within the range (inclusive on both ends) are kept.

Can I filter a CSV file with only a start date or only an end date?

Yes. Leave the start date blank to keep everything up to the end date. Leave the end date blank to keep everything from the start date onward. Both fields are optional — but at least one must be set to run the filter.

What if my CSV file does not have a date or timestamp column?

The tool detects date and timestamp columns automatically. If none are found, all columns are shown in the dropdown and the tool will attempt to cast the selected column to DATE. If the cast fails, an error is shown — use the Filter tool for text-based comparisons instead.

What does the match count shown before filtering tell me?

After you choose a column and set a date range, the tool runs a live COUNT query and shows how many rows will be in the output before you commit to downloading. This lets you verify your range without waiting for the full export.

Is my data private?

Yes — completely. Your file is never uploaded to any server. Everything runs locally in your browser using WebAssembly — processing happens entirely inside your tab. Once you close the tab, nothing is retained.

What is the maximum file size?

The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines handle 500 MB to 1 GB comfortably.