toolulah
  1. Home
  2. Spreadsheets & Data
  3. Query CSV with SQL

Query CSV with SQL

Run SQL on CSV, Excel and Parquet files with DuckDB and download the results.

Coming soon Roadmap phase 3 Runs in your browser · No upload

We're building this tool

Like every Toolulah tool, it will run entirely in your browser without uploading your files. If you need it, press the button below — we build the most requested tools first.

It will go live at this exact address. Bookmark it.

Tools you can use right now

Loan CalculatorMonthly payment, total interest and a full repayment schedule for three loan types. Percentage CalculatorX% of Y, X as a percent of Y, and percentage increase or decrease. VAT CalculatorAdd VAT to a net amount, or work backwards from a VAT-inclusive total. D-Day CalculatorCount down to any date, or count the days since one — with milestones. World ClockLive local time in major cities, with UTC offsets and DST status. Currency ConverterDaily mid-market rates for dollars, euros, pounds, yen and more.

Spreadsheets & Data · Coming soon

Excel Viewer Coming soonOpen XLSX, XLS and ODS files without Excel and browse every sheet. CSV Viewer Coming soonOpen large CSV and TSV files as a searchable table, even past Excel's row limit. Fix CSV Encoding Coming soonConvert CSV between UTF-8 and legacy encodings so it opens cleanly in Excel. Remove Duplicate Rows Coming soonFind and remove duplicate rows in Excel or CSV based on the columns you pick. Remove Blank Rows & Columns Coming soonDelete empty rows and columns from Excel or CSV files in one step. Trim Spaces in Excel Coming soonStrip leading, trailing, double and non-breaking spaces and stray line breaks. Phone Number Formatter Coming soonNormalize mixed Korean phone numbers to one format, such as 010-1234-5678. Address Cleaner & Splitter Coming soonTidy Korean addresses and split them into region, district and detail columns. Keep Leading Zeros Coming soonStop Excel from dropping leading zeros in ZIP codes and IDs from CSV files.

Can't find the tool you need?

Tell us what you want to do. We build the most requested tools first.