PixelBatch Pro - Batch Image Watermarker Offline No Upload

What's Inside

Have you ever spent hours doing something so repetitive that you felt your soul leaving your body? That’s exactly what happened to a close friend of mine recently.

She works as a Social Media Manager. Her daily routine involved downloading product photos from a supplier’s platform, manually adding a logo watermark to protect the brand, and then re-uploading them to Facebook and Instagram. One day, she had to process over 500 images. She was opening them one by one in Photoshop, placing the logo, saving, and closing. It was a nightmare.

She asked me, “Is there a way to do this faster without uploading my client’s private photos to those sketchy online converter sites?”

That was the spark. As a developer, I realized there was a massive gap in the market for a batch image watermarker offline no upload solution. Most tools are either expensive subscriptions or online services that harvest your data.

So, I built PixelBatch Pro. And today, I’m sharing it with you for free.

Download PixelBatch Pro (Free & Secure)

Start processing thousands of images in seconds. No internet required.

Download for macOS
Download for Windows

The Problem with Online Image Tools

When you search for “bulk watermark images” or “remove background online,” you get millions of results. But they all share the same critical flaws that PixelBatch Pro solves:

Privacy Risks: To edit an image online, you must upload it to a stranger’s server. For personal photos or unreleased product prototypes, this is a massive security breach.
Speed Bottlenecks: Uploading 100 high-res images (5MB each) takes forever depending on your internet speed. Then you have to wait for processing and download them back again.
Arbitrary Limits: “Free for the first 5 images, then pay $10/month.” We’ve all seen this.

PixelBatch Pro runs 100% locally on your machine. Your data never leaves your computer.

Deep Dive: What Can PixelBatch Pro Do?

While it started as a simple watermarking script, it has evolved into a comprehensive tool for content creators and e-commerce sellers.

Smart Batch Watermarking

This is the core feature designed for my friend. You can add text or image logos to thousands of photos instantly. Choose positions (like Bottom-Right or Center) to ensure your brand is visible on every asset.

AI Background Removal

Powered by the advanced rembg model (u2net), the app intelligently detects subjects and strips away backgrounds. Perfect for creating clean Amazon or Shopify product listings without a green screen.

Bulk Resizing & Compression

Stop slowing down your website with 4000px wide images. Automatically resize unlimited photos to 50% or specific dimensions to boost your SEO scores and page load speed.

Modern Format Conversion

Convert legacy JPGs to WebP (Google’s recommended format) for superior compression, or turn PNGs into JPGs for general sharing.

Under the Hood: How It Works (For the Techies)

For the developers reading this, I wanted to share a bit about the stack. I built PixelBatch Pro using Python because of its robust ecosystem for image processing.

Technical Stack Breakdown

GUI Framework: Built with Tkinter/CustomTkinter for a modern, dark-mode compatible interface that works natively on Windows and macOS.
Image Processing: Utilizes Pillow (PIL) for high-speed resizing, format conversion, and alpha compositing (watermarking).
AI Inference: The background removal calls the rembg library, which runs a pre-trained U-2-Net deep learning model directly on your local CPU/GPU.
Multi-threading: The app uses Python’s threading module to keep the UI responsive while processing heavy image queues in the background.

This architecture ensures that even if you are processing a batch of 5,000 images, your computer won’t freeze, and you don’t need an internet connection.

Step-by-Step: How to Watermark 1,000 Images in 3 Minutes

Let’s go back to the primary use case: helping you save time. Here is the exact workflow my friend now uses to finish her work before lunch.

Select Input: Click “Select Images” and drag-drop your entire folder of raw photos.
Configure Watermark:
- Check the “Add Watermark” box.
- Upload your logo file (PNG recommended).
- Select “Bottom-Right” alignment.
Optional Optimization: If these are for the web, check “Convert Format” to WebP and “Resize” to 80%.
Hit Start: Click “START PROCESSING”.

That’s it. PixelBatch Pro will churn through the queue. A task that used to take her 2 hours manually now takes about 3 minutes of computer processing time, allowing her to grab a coffee instead of clicking wildly.

Frequently Asked Questions

Is this really a batch image watermarker offline no upload tool?

Yes. “No upload” is our strict policy. The code runs as a standalone executable on your OS. There is no API call sending your images to the cloud.

Does it support transparent backgrounds?

Absolutely. If you choose PNG or WEBP as your output format, the transparency (alpha channel) is preserved, which is essential for logos and product cutouts.

Is it free for commercial use?

Currently, PixelBatch Pro is 100% free. I built it to solve a problem, not to charge subscriptions. You can use it for your business, freelancing, or personal projects.

Final Thoughts

Automation is the key to scaling your business. Whether you are a developer, a marketer, or a business owner, you shouldn’t be wasting your brainpower on repetitive tasks like resizing or watermarking.

PixelBatch Pro is my contribution to the community—a robust, secure offline batch image editor that respects your privacy and your time. Give it a try and let me know what you think!