Are my images uploaded to any remote server?

Never. ShrinkBox executes purely client-side inside your browser via HTML5 Canvas. Your images stay on your device at all times.

Can I resize an entire folder of photos simultaneously?

Yes, you can drop dozens or hundreds of images at once. The browser processes them sequentially and saves the compressed results.

Does it work without an internet connection?

Yes! Once loaded (or when using the standalone HTML full version), ShrinkBox requires zero internet connection to process images.

↓ ShrinkBox

● 100% Local · No Uploads

Free Online Demo · with watermark

Batch resize images.
Keep 100% privacy.

Resize, compress and convert large photo batches directly in your browser. No files are uploaded to any server. No signup, no installation, and completely offline-capable.

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Drop images here or click to browse

JPG, PNG, WebP, BMP · Batch processing enabled

No images selected yet

Max Dimension (longest edge)

Quality

80%

Output Format

Why Client-Side Image Resizing is Superior

Traditional web-based compressors upload your sensitive pictures across the internet to third-party servers. This results in slow transfer speeds, bandwidth limits, privacy concerns, and recurring SaaS subscription fees. ShrinkBox uses HTML5 Canvas to perform all resizing right on your device's CPU and GPU, ensuring lightning-fast performance and total data privacy.

Frequently Asked Questions

Can I use ShrinkBox offline?

Yes. Once this page loads or when using the standalone HTML full version, you can disconnect from the internet or go into airplane mode. The application runs entirely offline.

What are the differences in the full version?

The free demo adds a preview watermark. The ShrinkBox Full Version (€7 one-time purchase) removes the watermark, adds automated sequential file renaming, custom EXIF copyright data, and allows placing your own transparent PNG watermark at 9 customizable positions.

Need watermark-free batch processing & sequential renaming?

Get the standalone ShrinkBox Full Version for a one-time fee of €7 (no subscription). Keep the single HTML file on your device and use it forever without limitations.

Buy Full Version for €7 →