Free · Instant · 100% Private

No More VLOOKUP
for CSV & Excel

Merge files like a SQL JOIN, compare versions with a colour-coded diff, deduplicate rows, and pivot data — all in your browser, no account needed, no data ever leaves your device.

Start Merging Compare Files
or Try a live demo — see sample data in action
No file upload Zero data stored Works offline Instant results CSV & Excel Trial free

Four powerful tools, zero friction

Everything you need to wrangle CSV and Excel data — without formulas, without plugins, without waiting.

Most popular

Merge

SQL-style JOIN for spreadsheets

Combine two CSV or Excel files using a common key — like VLOOKUP but with inner, left, right, and outer joins. Pick exactly which columns to keep.

  • Inner / Left / Right / Outer join
  • Pick any columns from both files
  • Download merged result as CSV
Open Merge
Fuzzy match

Compare

Colour-coded diff between two versions

Upload an old and new version of a spreadsheet, match rows on one or more key columns, and instantly see what was added, removed, or changed — cell by cell.

  • Exact, partial, or fuzzy matching
  • Multi-column composite keys
  • Download diff as CSV
Open Compare
Group by any columns

Deduplicate

Find & count duplicate rows instantly

Group identical rows and see a count next to each unique combination. Filter to view only duplicates, only uniques, or everything — then download.

  • Group by all or selected columns
  • Count badges per row group
  • Filter duplicates / unique rows
Open Deduplicate
Sum · Count · Concat

Pivot

Transform rows into columns

Turn a tall Name / Month / Value layout into a wide pivot table in one click. Choose your row key, pivot column, value column, and how to aggregate duplicates.

  • Pick row key, pivot & value columns
  • Aggregate: sum, count, concat, first
  • Download wide CSV instantly
Open Pivot

Ready in three steps

No installation. No learning curve. Just results.

01

Upload your files

Drop or browse for any CSV, XLS, or XLSX file. Files are read entirely in your browser — nothing is sent to any server.

02

Configure the operation

Choose which columns to match on, which join type or match mode to use, and which columns to include in the output.

03

Preview & download

Results appear instantly in a scrollable table. Download as a clean CSV whenever you're ready.

Your data never leaves your browser

Every file you open is processed entirely in memory on your own device using WebAssembly and JavaScript. There is no server, no database, and no analytics on your files. Close the tab and everything is gone — guaranteed.

Common use cases

Real problems this tool solves every day.

Ready to ditch VLOOKUP?

Open a tool below — it works instantly, right now, for free.

Merge Compare Deduplicate Pivot