Blast Audit is an Excel add-in for audit workpapers. You install it once, open it in a workbook, and keep evidence linked to the cells you test. This page is the short how-to: install, extract, match, and ask questions about your documents.
1. Install the add-in from AppSource
Open Excel, go to Insert → Get Add-ins, and search for Blast Audit. Install it from Microsoft AppSource. Sign in with the same email you used for your workspace. The first run takes a couple of minutes; after that the add-in opens with the workbook.
A 14-day trial includes the full feature set. See pricing if you need the listed plan details.
2. Open it in the workbook you already use
Keep working in your existing .xlsx. Snips, evidence links, and annotations are written into the file, so a reviewer can open it later without a Blast Audit account. You do not export a side copy or move the engagement into another app.
3. Drop in the supporting documents
Upload PDFs or images into the add-in. OCR runs automatically on scans so the file becomes searchable. Digital PDFs use the embedded text layer. Either way, you stay in Excel.
Use OCR when the pack is mostly scans.
4. Snip evidence into cells
Select a value, table, or region in the document and snip it into a cell. The value lands in Excel with a link back to the exact spot on the page. That is the core “how to use Blast Audit in Excel” loop: number in the workpaper, source one click away.
See Snip for extraction patterns.
5. Match documents to the sheet
Highlight the range that should be supported (invoices, payments, sample items). Choose the documents, then run Match. Rows come back color-coded: full match, partial match, or missing support. Review the exceptions; leave the rest.
See Matching for the three-step flow.
6. Ask the documents a question
When you need a clause, a date, or a confirmation that is not already in a cell, use Probe. Ask in plain language and open the cited page to check the answer.
See Probe for document Q&A.
FAQs
How do I install Blast Audit in Excel?
Open Excel, go to Insert → Get Add-ins, search for Blast Audit, and install it from Microsoft AppSource. Sign in with your workspace email.
How do I use Blast Audit after it is installed?
Open it in your existing workbook, add supporting PDFs, snip values into cells with source links, run Match on the range that needs support, and use Probe to ask the documents a question.
Does evidence stay in the Excel file?
Yes. Snips, evidence links, and annotations are written into the .xlsx, so a reviewer can open the file later without a Blast Audit account.
What to do next
Install from AppSource, open a live workpaper, and snip one source-linked cell. That is enough to confirm the workflow before you roll it out to the rest of the file.