Extract Invoice with Next.js OCR API Route

Learn how to extract Invoice data programmatically using Next.js OCR API Route. Extract line items, totals, VAT, and payment details from Spanish invoices. Pre-configured for fuel Includes code, field mapping, and API integration.

Building a Invoice OCR UI with NEXTJS

This tutorial builds a complete Invoice extraction interface using NEXTJS. Users drag-and-drop a Invoice document, click extract, and see structured JSON results — all within your application.

NEXTJS Component Architecture

The component handles three states: upload (file selection), processing (spinner + progress), and result (formatted JSON display). State management uses NEXTJS's standard patterns.

Upload + Extraction Workflow

POST the document to /api/upload, get back a job identifier, then POST to /api/analyze/{job} to trigger extraction. The result contains all Invoice fields structured as JSON. 2-pass verification confirms data accuracy.

Displaying Invoice Fields

The extracted Invoice fields render in a formatted view. Show the JSON raw for developers or build a custom form for business users. Copy-to-clipboard and download-as-JSON are included.

Production Considerations

Add error boundaries for 401 (re-login), 402 (upgrade prompt), and network failures. For Clerk-authenticated users, the session token is used automatically. Store API keys server-side, never in client code.

Pricing

Extracting a Invoice costs ~0.002 EUR per page. Free tier: 1 page. Pro: 49 EUR/month (1,000 pages). Enterprise: 499 EUR/month (100,000 pages). See [volume pricing](/tutorials/comparisons/volume-pricing).

Next Steps

Get your free API key and build your Invoice extraction UI today. [Start now →](/app)

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