100KB Extension v1.1.1: Compress & resize files in 0ms directly in Google Chrome
Remove digital watermark stamps, certification dates, or scanner artifacts securely from documents and certificates.
Scanned academic certificates, passport copies, and identity documents often suffer from unwanted camera date stamps, agency watermarks, or background paper smudges that cause instant rejections when submitted to digital verification systems.
Our client-side Remove Watermark tool provides a localized pixel-inpainting brush. It isolates watermarked coordinates, analyzes surrounding texture patterns, and reconstructs underlying background pixels using local canvas blending algorithms—all without uploading your sensitive records to remote servers.
| Inpainting Mode | PDE Algorithm / Engine | Mask Precision | Output Format | Reconstruction Quality |
|---|---|---|---|---|
| Text Watermark Eraser | Navier-Stokes Partial Differential Equations | 1-bit Binary Canvas Mask | Lossless PNG / Quantized JPG | Seamless Text Removal |
| Stamp & Logo Masking | Fast Marching Telea Algorithm | Interactive Brush Mask | High-Res JPG | Document & Photo Reconstruction |
| Background Texture Eraser | Spatial Edge Preservation Filter | 24-bit RGB Channel Preservation | JPG / PNG | Clean Scan Previews |
Follow these simple steps to optimize and prepare your files secure:
Select the image containing a watermark or date stamp.
Use the brush tool to highlight the area to clean.
Our engine reconstructs local background textures.
Save your restored photo without watermarks.
Find answers to common questions about our free online tools.
Lead WebAssembly Systems Engineer at 100KB Tools. Technical specifications researched and cross-verified against official ICAO Doc 9303 Part 9 standards, ISO/IEC 10918-1 JPEG specifications, and PDF/A ISO 19005 guidelines.
Reduce image file size in KB or MB online. Compress JPG, PNG, and WebP files securely without changing dimensions.
Remove background from images and passport photos online for free in full original quality. Unlike other expensive alternatives, we do not reduce quality.
Resize image dimensions in pixels, mm, cm, or inches online. Crop photos in circle, square, or rounded corner shapes.
Upload Certificate or Scanned Document
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Runs 100% securely in your browser. No images are uploaded.