Grayscale Effect

Workflow & Usage

1. Add your images
   Drag & drop, paste, or select JPEG/PNG/WebP files. Previews load instantly with EXIF orientation applied.

2. Adjust global grayscale
   Use the Grayscale slider to set the overall black-and-white strength for the entire batch.

3. Fine-tune individual photos
   Open Edit on any image to adjust its grayscale level relative to the global setting.

4. Select which images to include
   Toggle Include, remove unwanted images, or adjust sliders until everything feels right.

5. Export

   • Download a single file — retains the original format
   • Download all as ZIP — bundles all included images with clear filenames like photo-grayscale-80.jpg

Everything processes locally for full privacy and speed.

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Use Cases

• Social media black-and-white themes Batch-style monochrome posts for clean, consistent branding.

• Marketing and editorial design Convert assets for hero banners, magazine layouts, or muted UI backgrounds.

• E-commerce product shots Produce grayscale variants for hover states, galleries, or mood-boards.

• Photography workflows Quickly test black-and-white interpretations across a full shoot.

• Content creators & bloggers Create cohesive visuals for thumbnails, articles, and background textures.

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Tips for Best Results

• Start with the global slider. Set the baseline grayscale first — it saves time across large batches.

• Use per-image edits for standout photos. Boost or reduce grayscale where extra contrast or mood is needed.

• Keep originals safe. This tool exports separate files so your source images are never modified.

• Naming helps you stay organized. The converter adds tags like -grayscale-60 to make versions clear during handoff.

• Pair with compression when needed. After converting to grayscale, run files through the Image Compressor or
  Progressive JPEG Converter for faster page loads.

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How It Works

• Local rendering with Canvas. Each image is decoded via createImageBitmap() (with EXIF orientation applied) and then rendered through Canvas with a grayscale filter.

• Global + per-image logic. Every image uses grayscale = global + offset, clamped to 0–100%. This gives clean batch control with fine per-image adjustments.

• Original format preserved. Files are exported in their original MIME type — JPEG stays JPEG, PNG stays PNG, WebP stays WebP.

• Batch ZIP export. Selected images are processed at full resolution and packaged with JSZip for an instant, one-click download.

• Privacy by design. No servers, accounts, or uploads. Your images never leave your device.