DCPIXEL uses the client-side pdf-lib engine to concatenate PDF documents. Your files never leave your device, meaning absolute privacy and zero upload wait times even for large PDFs.
100% Private — Processed in Your Browser
Every file stays on your device. DCPIXEL processes images entirely using the browser's built-in Canvas API and WebAssembly — zero server uploads, zero data collection.
Premium Features & Batch Processing
Try this tool free a few times per day. Upgrade to DCPixel PRO to unlock unlimited exports, high-speed batch processing, and full-resolution AI tools.
Frequently Asked Questions
Is Merge PDF free to use?+
You can open Merge PDF, upload a file, and preview it for free a few times per day. Exporting/downloading the result requires DCPixel PRO — an advanced-tools upgrade that also raises the batch-processing limit (2 → 500 files) and removes the 480px resolution cap on AI-powered tools.
Does Merge PDF upload my files to any server?+
Never. Every operation runs locally in your browser using the HTML5 Canvas API and WebAssembly. Your files never leave your device.
What image formats does Merge PDF support?+
Check the upload area for the full list of accepted formats. Most tools support JPG, PNG, and WebP at minimum.
How long does Merge PDF take to process an image?+
Typically under 5 seconds for most images. Since processing happens locally on your device, speed depends on your CPU — not server queue time.
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