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Randozi
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BOM Diff Checker

Compare the old and new version of a parts list, shopping list or bill of materials and see exactly what was added, removed or changed.

Differences

1 added · 1 removed · 1 changed

1 part unchanged.
+ U2-STM32 x1
- U1-ATMEGA x1
~ R10K 4 -> 6 (+2)

How it works

  1. Paste the old list in the first box, one part per line, with the quantity after a comma, semicolon or tab.
  2. Paste the new list in the second box in the same format. A line without a quantity counts as 1.
  3. Read the added, removed and changed parts, with the quantity difference for each.
  4. Copy the result into your change notes or purchase order.

What people use it for

  • Hardware revisions

    Spot which components changed between two versions of a board or kit.

  • Shopping and ordering

    Compare last month’s order with this month’s needs.

  • Building projects

    See what to buy when a materials list is updated after a design change.

Questions

What format does it expect?
One line per part: the reference first, then the quantity, separated by a comma, semicolon or tab (for example R10K, 4). A quantity separated by a space also works. A line with no quantity counts as 1.
What happens with duplicate lines?
Quantities of the same reference are added together within each list, and references are compared without regard to upper or lower case.
Is my list uploaded?
No. The comparison runs in your browser and the text you paste is never sent anywhere.