Paste a formula. Get four kinds of feedback.
An explanation in plain English, a lint check for anti-patterns, a pretty-printed version, and a complexity score. All four run client-side, instantly, no API calls.
Tip: press Ctrl+K from anywhere to focus the input.
Sample 1: VLOOKUP + IFERROR
Sample 2: Nested IF
Sample 3: Volatile OFFSET
Sample 4: Clean LET
What gets checked
The lint rules
- Volatile functions — NOW, TODAY, RAND, RANDBETWEEN, OFFSET, INDIRECT, CELL, INFO. Recalculate on every workbook change.
- Legacy with modern alternative — VLOOKUP/HLOOKUP (use XLOOKUP), CONCATENATE (use TEXTJOIN/CONCAT).
- Deeply nested IFs — three or more flagged; suggest IFS instead.
- VLOOKUP with hardcoded column index — fragile under column inserts.
- Outer IFERROR — hides every error type including bugs; suggests IFNA where applicable.