Is Universal Image Format Converter safe to use?

Yes, Universal Image Format Converter is completely safe. Unlike other tools that upload files to external servers, PDF Toolkit processes all files 100% locally in your web browser. Your private documents never leave your device.

Can I use Universal Image Format Converter offline?

Yes, once the website loads, all operations work completely offline. You can process your documents without an internet connection.

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🔒 100% Private — Files never leave your device.

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Universal Image Format Converter

Batch convert between HEIC, WebP, PNG, JPG, and AVIF formats client-side. Zero server uploads, custom background color for transparency.

Drop your images here, or browse

Supports JPG, PNG, WebP, AVIF & iPhone HEIC. Batch processing supported.

💡 Pro-tip: PressCtrl + Vto paste screenshots directly

How to Use the Universal Image Format Converter

Fast, local, and 100% free tool. No software installation or cloud uploads required.

Drop Files

Upload any combination of HEIC, WebP, PNG, JPG, or AVIF files.

Choose Output

Pick target format (JPG, PNG, WebP) and quality.

Custom Background

Choose solid background color when converting transparent images to JPG.

Batch Download

Download converted files one-by-one or as a consolidated ZIP.

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100% Client-Side In-RAM Privacy Guarantee

Every byte of image processing is calculated locally on your CPU/GPU using modern WebAssembly, Canvas API, and HTML5 Web Workers. Zero images are ever uploaded to cloud servers or stored in remote databases.

✓ 100% Local In-RAM✓ Zero Server Uploads✓ Unlimited Free Use✓ GDPR & HIPAA Safe

Frequently Asked Questions

Yes! Our engine uses client-side WASM HEIC decoding to convert Apple iPhone .heic and .heif photos directly in your browser without sending them to any server.