Intelligent Image Watermark Recognition
Uses pdf-lib to deeply scan all image objects in PDF, extract metadata such as size and dimensions to quickly locate suspicious watermark images.
Professional PDF Watermark Removal Tool (Free)
Intelligently identify all image objects in PDF, automatically extract metadata, support batch selection by size to remove image marks from scanned documents. All processing done locally to protect privacy.
Workspace
After uploading a PDF file, the left side displays all detected images (with thumbnails, dimensions, size), and the right side previews the document content in real time.
- · Files are not uploaded to server, fully processed locally to protect privacy and security
- · Support smart selection of identical watermarks by file size, batch deletion with one click
- · Support JPEG and PNG format images (with transparency), suitable for most scanned documents
- · Automatically download processed PDF after deletion, can be opened with any PDF reader
Drag and drop PDF to this area, orclick to select file
Files are only processed locally in browser, not uploaded to server
Image List
Actions
Currently selected 0 images
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Batch Smart Selection
Watermark images are usually the same size. Smart select by file size with one click, support batch deletion to greatly improve processing efficiency.
Pure Local Security Processing
All processing completed locally in browser, files not uploaded to server. Supports JPEG and PNG (with transparency), protects document privacy.
Frequently Asked Questions
Is this tool really free? +
Yes, completely free with no hidden charges. All features are available without registration or payment.
Is my PDF file safe? +
Absolutely. All processing is done entirely in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.
What types of watermarks can be removed? +
This tool focuses on image-based watermarks embedded in PDF files (such as logo overlays on scanned documents). It detects and removes image objects by analyzing their metadata. Text-based watermarks are not currently supported.
Which browsers are supported? +
All modern browsers are supported, including Chrome, Firefox, Edge, and Safari. We recommend using the latest version of Chrome or Edge for the best experience.
Is there a file size limit? +
There is no strict file size limit. Since all processing happens locally in your browser, the limit depends on your device's available memory. Most devices can handle files up to several hundred megabytes.