SilentCanoe
SilentCanoe /
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Costco Bill Analyser
☕ Buy me a coffee 100% Local

Costco Bill Analyser

Import Costco Receipt Downloader JSON files (best) or upload PDF receipts and get deep spending insights — categories, trends, coupons, warehouses, staples, and more. Zero uploads, 100% private.

Llama 3.2 3B — AI Receipt Analysis (~2 GB · Chrome 113+ · cached after first use)
Idle — model downloads on first file drop (requires WebGPU)
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Drop Costco JSON or PDF Receipts Here

JSON from Costco Receipt Downloader is the easiest and most accurate

JSON + PDF·Processed locally·Never uploaded
Fetch Costco JSON Automatically (Advanced Setup)

Install once as a bookmark, then click it on Costco account pages to download your receipts JSON instantly.

Install Costco Sync Bookmark Open Costco Account
  1. Install Costco Sync Bookmark in your bookmarks bar.
  2. Open Costco account home and sign in.
  3. Click the bookmark once to download JSON.
  4. Upload here for private analysis.

Browser security blocks direct cross-site automation from this page, so bookmarklet is the fastest setup-free option that still runs fully local.

No receipts loaded yet. Upload JSON or PDF to generate analysis.

Frequently Asked Questions

What is the easiest way to analyse Costco receipts here?

Use the built-in Costco Sync bookmark installer on this page. Save the bookmark once, open Costco account home, and click the bookmark to download receipts JSON. Then import that file here for the most accurate insights. PDF upload remains available as a fallback.

Is my financial data safe?

Completely. All processing happens in your browser — your receipts and spending data are never sent to any server. The tool has no backend. Even the AI model runs locally on your device via WebGPU.

What if the AI mode doesn't work on my computer?

AI mode is only used for PDF parsing and requires WebGPU, available in Chrome 113+ and Edge 113+ on desktop. On unsupported browsers, the tool automatically falls back to regex parsing. JSON imports do not need AI mode and are typically more accurate.

Can I analyse receipts from multiple months?

Yes — you can import large Costco JSON exports and/or multiple PDF receipts. The dashboard aggregates spending across all receipts, showing monthly trends, cumulative category totals, warehouse patterns, and staple items across shopping trips.

Is this connected to Costco or any backend API?

No. This analyser is not affiliated with Costco and has no backend service. You import files manually, and all parsing and analytics run locally in your browser. Your receipts are never uploaded.

How do I export my spending data?

Use the Export tab to download an "All Items CSV" (every item from every receipt with category labels), a "Summary CSV" (per-receipt totals and top category), or copy a plain-text summary to your clipboard for pasting into other apps.