Free Bulk Image Watermarker
Protect Your IP.

Welcome to the ultimate brand protection suite. Batch stamp your text copyright or custom logo onto thousands of photos instantly using your own device's processor. Never upload your pristine, unreleased originals to a cloud server again.

✓ No Upload Required ✓ Custom Logos & Text ✓ 100% Private Engine ✓ Free Forever
Start Branding Free

No signup required Works instantly 100% browser-based

Free local bulk image watermarking tool interface Hikaru Labs
Local browser based image watermark architecture

The Native Protection Engine

The age of uploading high-res, unprotected creative work to a random cloud server just to watermark it is a massive security risk. Hikaru Labs utilizes a "Zero-Server" architecture. We deploy our overlay rendering logic directly to your browser tab.

When you drop your originals, they load instantly because they are only traveling from your hard drive to your browser's memory. When you execute the stamp, your CPU burns the overlay into the pixels locally. This guarantees absolute IP security.

Instant File Loading (No Upload)

Drop your pristine photos or a ZIP archive. Files load into memory instantaneously. Zero network waiting time.

Design Your Mark

Type your copyright text, or upload your brand's transparent PNG logo. Dial in the perfect size, position, and transparency.

Stamp Images Locally

Hit Apply. Your device's native CPU processes the batch, fusing the watermark layer onto every file. Unprotected originals never cross the internet.

Secure Export

Download your newly protected image files or export a secure .ZIP archive generated entirely on your own machine.

Dedicated Watermarking Tool

Specific brand protection tasks handled locally with absolute security.

Text & Copyright Stamps

Easily type out your name, business, or the © symbol. Choose your font style, color, and drop shadow to make sure your ownership is clearly visible on every asset.

Custom PNG Logos

Maintain your professional branding. Upload your own transparent logo file and our engine will seamlessly overlay it onto your entire batch of photography.

Smart Proportional Scaling

Mixing horizontal and vertical shots? Our dynamic scaling ensures your watermark maintains the exact same relative size and position, regardless of the individual image dimensions.

The Capabilities

A comprehensive toolkit for bulk branding and digital rights management.

Dynamic Positioning

Lock your watermark to the bottom right, center it, or tile it repeatedly across the entire image to prevent unauthorized cropping or theft.

Opacity Control

Make your mark subtle or highly visible. Fine-tune the transparency slider so your watermark protects your work without destroying the viewing experience.

Automated File Renaming

Processing massive galleries? Our naming tool automatically appends tags like "_watermarked" or "_proof" to all exported files so you never mix them up with your originals.

Compare Hikaru Labs vs Online Watermarkers

Why local processing is mandatory for IP protection.

Feature Hikaru Labs Watermarker Traditional Cloud Watermarkers
Upload Required No (100% Local) Yes
IP Security Absolute (Unprotected originals never leave your machine) Compromised (Originals are stored on external servers)
Processing Speed Instant (No network latency) Slow (Depends entirely on internet speed)
Offline Mode Supported Not Supported

Global Recognition Award 2026 Startup of the Year

Global Recognition Award 2026 Winner - Hikaru Labs local image processing

Recognized for innovation in browser-based tools. By eliminating reliance on external cloud servers, we offer a more sustainable, fast, and secure alternative to traditional SaaS.

99
Google PageSpeed
A+
Website Carbon Rating
0ms
Upload Latency

Frequently Asked Questions

Everything you need to know about how the Watermark Adder works.

Never. Our tool generates brand new, watermarked copies of your images. Your pristine, original files remain safely untouched on your hard drive.

Yes! You can upload any transparent PNG logo file. Our engine allows you to scale it, adjust the opacity, and position it perfectly across your entire batch of photos.

Our smart positioning algorithm dynamically calculates the placement. If you set your watermark to be 10% of the image width in the bottom right corner, it will look perfectly proportional whether the image is 800px or 8000px wide.

100%. Uploading unreleased, unwatermarked photography to a cloud server is a massive security risk. Our tool executes directly inside your web browser, meaning your unprotected originals never leave your computer.

Aksh Raj (CFBL) - Founder of Hikaru Labs

Protect Your IP Locally

"Uploading your pristine, unreleased creative work to a random cloud server just to 'protect' it with a watermark is a terrifying paradox. It's a massive security risk and it completely hands over your uncompressed originals to a faceless corporation."

"So I built Hikaru Labs. I wanted an absolute weapon of a security tool that ran strictly on the bare metal of the web browser. No bottlenecks. No hidden APIs stealing unwatermarked data. Pure mathematical efficiency running on your CPU."

"Winning Startup of the Year in 2026 proved one thing: the future of digital rights management isn't in the cloud. It's right there on your local machine. Take back control."

// Aksh Raj (CFBL)
Founder & Lead Engineer, Hikaru Labs