I built a simple, fast, and privacy-focused web tool for bulk image compression and HEIC conversion.

The Problem: Many online compressors upload your photos to their servers, which is a privacy risk and slow for large batches.

The Solution: This tool handles everything 100% locally in your browser.

Technical Stack:

image-compression: Uses Web Workers for non-blocking UI during heavy compression tasks.

heic2any: Enables browser-side HEIC/HEIF to JPEG conversion (handy for iPhone users).

jszip: Batches processed images into a single ZIP for one-click download.

Concurrent Processing: I implemented a custom queue (MAX_CONCURRENT = 3) to balance speed and browser stability.

Key Features:

No server uploads (Privacy-first).

Batch processing with ZIP export.

Adjust quality and format (WebP/PNG/JPG) on the fly.

Dark mode support & Responsive UI.

I'd love to hear your feedback on the processing performance or any format support you'd like to see!

Site: https://zip.easynote.cc/