🔢 DeckMedic · Data Engine · Tool 1 of 2

PPTX Decimal Normalizer
Fix Inconsistent Number Formatting in AI Tables

AI-generated financial tables are inconsistent. Row 1 says "$10.00", Row 2 says "10", Row 3 says "$10.001". Your MD will kill you for it. This tool enforces uniform decimal precision across every table cell in your deck — in seconds, with a before/after audit trail.

🔒

Zero upload

File stays on your device

⚡

Instant

No server round-trip

🆓

Free

No sign-up required

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Tables only

Text outside tables untouched

Target decimal places

Selected: force 2 decimals on all numbers found in table cells. Currency symbols, commas, and % signs are preserved.

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Drop your .pptx here

or click to browse

Runs 100% in your browser — file never leaves your device

What this tool actually does

← drag handle to compare  ·  left = before  ·  right = after →

✕ Before
  • Slide 3, TableRow: $10 / 10.0 / $10.001
  • EBITDA margin12.5 / 12.50 / 12.5000
  • EPS (FY25E)2.3 / 2.30 / 2.3
  • Revenue ($B)4 / 4.0 / 3.99500
✓ After
  • Slide 3, Table$10.00 / $10.00 / $10.00
  • EBITDA margin12.50 / 12.50 / 12.50
  • EPS (FY25E)2.30 / 2.30 / 2.30
  • Revenue ($B)4.00 / 4.00 / 4.00
📖 How this tool works · Tips · Browser Privacy

Decimal Normalizer — How it works

  1. 1

    Unzip + parse

    The PPTX is opened as a ZIP archive. Every slide XML file (ppt/slides/slideN.xml) is read as a UTF-8 string.

  2. 2

    Locate all tables

    The tool finds every <a:tbl> (table) element within each slide. Each table is scanned row by row, cell by cell.

  3. 3

    Identify numeric cells

    Each cell's text content is extracted and tested against a strict pattern: optional currency prefix, numeric value, optional % suffix. Cells containing labels, dates, or mixed text are skipped.

  4. 4

    Apply toFixed()

    Numeric cells are reformatted using JavaScript's toFixed(n) — the currency prefix and % suffix are preserved. The change is recorded in the audit log.

  5. 5

    Rebuild and download

    The patched XML is written back into the ZIP, and a clean PPTX is generated for download with the _decimals_fixed.pptx suffix.

What this tool skips

Text outside tables

Numbers in text boxes, titles, and body text are not touched — only <a:tbl> table cells.

Header rows & labels

If a cell contains any non-numeric text ("Revenue", "Q3", "FY25 E"), it is left unchanged.

Mixed-content cells

"Revenue: 10.5M" fails the pure-number test and is skipped entirely.

4-digit years (1900–2099)

"2024", "2025", "2030" — year values in column headers are detected and preserved as-is.

Tips for best results

  • → Run the Decimal Normalizer immediately after AI generation — before peer review or design formatting.
  • → Use 2 decimal places for per-share values (EPS, DPS) and currency line items.
  • → Use 1 decimal for margin percentages (EBITDA %, revenue growth rates, etc.).
  • → Check the audit log before downloading — every changed cell is listed by slide and table row.
  • → Only table cells inside <a:tbl> elements are modified — text boxes and title shapes are untouched.

Privacy & data security

🚫

Zero upload

No file ever sent to a server

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Works offline

After first page load

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No telemetry

File data never logged

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GDPR safe

No data processor needed

Browser compatibility

Chrome 112+Edge 112+Firefox 111+Safari 16.4+iOS Safari 16.4+Chrome Android 112+

Decimal Normalizer vs. alternatives

Method Decimal Normalizer Manual Edit VBA Macro
Processes all slides at once ✅ Yes ❌ One cell at a time ✅ Yes
Before/after audit trail ✅ Full log ❌ None ❌ No log
Preserves currency symbols ✅ Yes ✅ Manual ⚠️ Depends on macro
Zero install ✅ Browser-based ✅ Built into PPT ❌ Requires PowerPoint + VBA
Works on Mac / Linux ✅ Yes ✅ Yes ❌ Windows only
Handles 50-slide deck ✅ Seconds ❌ Hours ✅ Seconds

Who uses the Decimal Normalizer

🏦

Investment Banking Analysts

Pitch books and CIM documents require strict house style: 1 decimal for multiples, 2 for per-share values. AI-generated tables violate this constantly. One run before printing fixes every table in the deck.

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Equity Research Associates

Initiation reports and earnings models live and die by consistent decimal formatting. Mixed precision reads as sloppy to institutional clients and portfolio managers reviewing the stack.

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Strategy Consultants

Client-facing board decks, QBR summaries, and market sizing models go through strict QA. A number formatted as "2.5" next to "2.50" next to "3" on the same table is a last-minute fire drill — this eliminates it.

Frequently asked questions

What numbers does the Decimal Normalizer change in a PowerPoint?
The tool scans every <a:t> text node inside <a:tbl> table elements across all slides. It targets cells that contain a pure number string — including integers, decimals, currency-prefixed values ($10, €10), and percentages (10%). It reformats the numeric value to the selected decimal places using toFixed(), preserving the original prefix and suffix.
Why do AI-generated tables have inconsistent decimal formatting?
AI models generate numbers from different data sources within the same prompt — one value from a spreadsheet snippet, another from a conversion, another from direct generation. Each source uses its own rounding. Investment banks and research firms have strict house style rules requiring uniform decimal places — typically 1 or 2 for financial data.
Does this tool modify text that is not a number?
No. The tool applies a strict regex pattern before touching any cell. Only cells whose entire trimmed text matches the pattern of a numeric value (optionally prefixed with a currency symbol, optionally suffixed with %) are modified. Labels, names, mixed-text cells, and standalone 4-digit years (2022–2030) are left completely unchanged.
What decimal precision should I choose for a financial model?
For investment banking and equity research: use 1 decimal for percentage metrics (EBITDA margins, growth rates), and 2 decimals for per-share values (EPS, DPS) and currency amounts. For deal summaries and board presentations, 0 or 1 decimal is standard.
Is my PPTX uploaded to a server?
No. All processing runs in a Web Worker inside your browser using JSZip. The file is read locally, the XML is patched in memory, and the fixed file is downloaded directly. No data leaves your device.

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