How do you handle exports with millions of rows?

Large exports use streaming with cursor-based database queries and chunked file writing. The export runs as a background job with progress tracking, and the user is notified via email or in-app notification when the file is ready.

Can exports include related data from multiple tables?

Yes. We build export queries that join related data and present it in a denormalized format suitable for spreadsheet analysis. Complex relationships can be exported as multiple sheets in a single Excel file.

Do you support scheduled/recurring exports?

Absolutely. Users can schedule exports to run daily, weekly, or monthly with configurable filters. Completed exports are delivered via email or saved to a download center within the application.

Let Users Export Their Data in Any Format They Need

CSV, Excel, PDF, and JSON exports with filtering, scheduling, and background processing. Bookuvai builds export systems that handle millions of rows without breaking a sweat.

Feature: Data Export

Data export empowers your users to take their data with them, whether for reporting, compliance, migration, or analysis in external tools. A well-built export system handles large datasets without blocking the UI, supports multiple formats, and respects user permissions. Bookuvai builds export features that work reliably at scale with progress tracking and download management.

Benefits

Multiple Formats: Export to CSV, Excel (.xlsx), PDF, JSON, or XML with format-specific features like multiple sheets, formatting, and charts.
Background Processing: Large exports run asynchronously with progress indicators, email notifications on completion, and expiring download links.
Filtered Exports: Users can apply filters, date ranges, and column selections before exporting, getting exactly the data they need.
GDPR Data Portability: Automated personal data export for GDPR Article 20 compliance, generating machine-readable archives of all user data.

How It Works

Export Requirements: Define which data entities are exportable, supported formats, maximum row limits, and permission rules for each export type.
Export API: Build export endpoints that accept filter parameters, validate permissions, and queue large exports for background processing.
Format Generators: Implement format-specific generators for CSV, Excel (with styles/formulas), PDF (with headers/footers), and structured JSON.
Background Jobs: Set up job queues for large exports with progress tracking, automatic cleanup of expired files, and failure retry logic.
Download Management: Build a download center UI where users can see export history, re-download completed exports, and schedule recurring exports.

Technology Options

ExcelJS + PDFKit: Node.js libraries for generating Excel files with formatting, charts, and multiple sheets, plus PDF generation with custom layouts. (Best for: Applications needing rich Excel and PDF exports with custom formatting)
Streaming CSV + BullMQ: Stream large datasets to CSV files using Node.js streams, with BullMQ managing background job queues and progress tracking. (Best for: High-volume exports with millions of rows where memory efficiency is critical)
Puppeteer / Playwright: Headless browser-based PDF generation that renders HTML/CSS templates into pixel-perfect PDF reports and invoices. (Best for: Complex PDF reports that need to match a specific visual design)

Estimated Hours

Simple: 6-12 hours | Moderate: 12-25 hours | Complex: 25-45 hours

Frequently Asked Questions

How do you handle exports with millions of rows?: Large exports use streaming with cursor-based database queries and chunked file writing. The export runs as a background job with progress tracking, and the user is notified via email or in-app notification when the file is ready.
Can exports include related data from multiple tables?: Yes. We build export queries that join related data and present it in a denormalized format suitable for spreadsheet analysis. Complex relationships can be exported as multiple sheets in a single Excel file.
Do you support scheduled/recurring exports?: Absolutely. Users can schedule exports to run daily, weekly, or monthly with configurable filters. Completed exports are delivered via email or saved to a download center within the application.