Jason / Pro Free limit reached

Local project limit

Keep every workspace.

Pro includes

1. 01Unlimited local projects
2. 02No Jason-enforced file-size limit
3. 03Advanced calculated columns
4. 04Local Data Suite formats and tools

Device and browser storage still set practical limits.

Split CSV for Excel

Filter the rows. Column Condition Equals Does not equal Less than Less than or equal Greater than Greater than or equal Contains Is blank Is not blank Value Match case for Contains

Order the full dataset.

Jason builds a stable local order without rewriting source rows or formulas. Add up to three keys; true blanks remain last.

Add another key

Add a calculated column. Column name Formula

Mask columns.

Writes a masked copy to a new CSV file. Nothing leaves this device and the open project is not changed.

Secret key (16+ characters, pseudonymization only)

Remove duplicate rows.

Rebuilds this project without the duplicates. Everything happens on this device and the file you imported from is never touched.

Which copy to keep Keep the first row of each duplicate group Keep the last row of each duplicate group Keep only rows that appear exactly once Compare these columns (none ticked = the whole row)

Bring columns from another project.

Matches each row of this project against another local project by key and appends the columns you choose. Row count and row order never change. Everything happens on this device.

Lookup project Key column in this project Key column in the lookup project Columns to bring across

Summarise by column.

Groups every row by the columns you choose and totals the rest. The summary opens as its OWN project -- this one is not changed, so you keep both the data and the answer. Works at any size: only one group is held in memory at a time, never one per distinct value.

Group by And then by (optional) Totals to calculate

What's in this file.

Reads every row once and reports, per column, how often it is blank, how many different values it holds, its lowest and highest, and what dominates it. Nothing is estimated: past a thousand distinct values the count says "at least" instead of guessing.

Compare with another project.

This project is the baseline. added means a row the other project has and this one does not; removed means a row this project has and the other does not; changed means the key matched but the row did not. Neither project is modified and the result downloads as a CSV. Both sheets must have the same columns.

Compare against (the other version) Key column