BYTETOOLS

CSV Filter

Filter CSV rows online by column conditions — equals, contains, regex, empty, numeric ranges — combined with AND/OR. Keep or remove matches, fully in-browser.

Drop a .csv file here or click to browse

What is the CSV Filter?

The ByteTools CSV Filter keeps or removes rows of a CSV file based on conditions you define. Point a condition at any column and test it with equals, contains, starts with, ends with, a regular expression, an empty check, or numeric comparisons like greater than, less than and between.

  • 11 operators including regex and numeric between
  • Two conditions combinable with AND / OR
  • Keep-matching or remove-matching modes
  • Case-sensitive toggle for text comparisons
  • Kept and removed row counts after every run
  • 100% private — nothing is uploaded

How to use the CSV Filter

  1. 1

    Paste your CSV or drop a .csv file.

  2. 2

    Choose the column, operator and value for your first condition.

  3. 3

    Optionally add a second condition and combine with AND or OR.

  4. 4

    Pick whether matching rows are kept or removed.

  5. 5

    Click Filter CSV, check the kept/removed counts, then copy or download the result.

About the CSV Filter

The ByteTools CSV Filter keeps or removes rows of a CSV file based on conditions you define. Point a condition at any column and test it with equals, contains, starts with, ends with, a regular expression, an empty check, or numeric comparisons like greater than, less than and between.

Add a second condition and combine the two with AND or OR to express things like status equals active AND amount greater than 100. You choose whether matching rows are kept or dropped, and the tool reports exactly how many rows survived and how many were removed.

Filtering runs 100% locally in your browser — your data never touches a server. It is a fast way to trim big exports down to the rows you actually need before loading them into a spreadsheet, script or database.

Frequently asked questions

How do I filter CSV rows that contain a certain value?

Select the column, choose the Contains operator, type the value and click Filter CSV. Every row whose cell in that column includes your text is kept — or removed, if you switch the action to Remove matching rows.

Can I filter a CSV by a number range?

Yes. Use the Between operator and enter a minimum and maximum, or combine Greater than and Less than conditions with AND. Cells are parsed as numbers, so 1,250.50 compares correctly rather than as text.

Does the filter support regular expressions?

It does. Choose Matches regex and enter any JavaScript regular expression, such as ^ACME-\d+$ to match IDs. Invalid patterns produce a clear error instead of silently matching nothing.

How do I delete rows with empty cells?

Point a condition at the column, pick the Is empty operator and set the action to Remove matching rows. Cells containing only whitespace count as empty too.

Is my file uploaded to filter it?

No. Parsing and filtering run entirely in your browser with JavaScript, so the data never leaves your machine — safe for exports with customer or financial details.

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