User Guide
From adding images to exporting the final result takes only five steps. This page fully explains what each feature does and how to use it. We recommend reading it through on first use, after which you can process batches efficiently.
Five Steps to Batch Watermarking
- Add images: Click "Click to select" or drag images into the dashed box (multiple supported); you can also click "📁 Import whole folder" to import an entire directory (including subfolders) at once. Drag the ⋮⋮ handle in the list to reorder.
- Choose watermark type: "Text" is ideal for copyright or anti-theft notices; "Image" is ideal for placing a logo. Text content supports multiple lines — press Enter to split into multiple watermark rows.
- Adjust the style: Set font size, color, opacity and rotation, and optionally enable stroke, shadow and a semi-transparent background box. For logo watermarks you can adjust scale, opacity, rotation and corner radius. All adjustments render live in the preview.
- Choose layout: "Tile Full" repeats the watermark across the whole image (density, tilt and scatter are adjustable); "Single Position" uses the 3x3 grid for quick placement, or you can drag the watermark handle in the preview to fine-tune. After dragging, click a grid cell to return to the preset position.
- Export & download: Choose PNG (lossless) or JPG (adjustable quality), and optionally limit the long edge to reduce file size. Click "Add Watermark & Download ZIP" to get a ZIP archive; a progress bar appears during export and you can cancel at any time.
Feature Details
| Feature | Description |
|---|---|
| Multi-line text watermark | Press Enter in the content box to start a new line; each line is drawn independently and centered as a group — perfect for a "site name + date" two-line combo. |
| Placeholders | Both watermark text and the export suffix support {n} (index, starting from 1), {date} (today's date) and {name} (original filename), auto-replaced per image in a batch. |
| Tiled watermark | Adjustable density (spacing). "Tilt" randomly rotates each tile by a small angle; "Scatter" randomly offsets each tile's position. Combined, they look more like a real captured watermark and are hard to batch-crop out. |
| 3x3 grid placement | In single mode, click a grid cell for quick placement; drag the watermark in the preview for arbitrary fine-tuning. The position area shows "Custom position set" and a one-click "Reset" returns to the preset. |
| Presets | Save a frequently used config (e.g. "diagonal tiled semi-transparent black text") as a template and apply it with one click next time. Templates are stored in your local browser. |
| Undo / Redo | Nearly every parameter change can be undone (Ctrl+Z); redo is Ctrl+Y or Ctrl+Shift+Z. Up to 80 history steps are kept. |
| Skip export | Uncheck an image in the list and it is automatically skipped on export (shown semi-transparent) — handy for picking a subset out of a large batch. |
| Parallel export | When the browser supports it, multi-threading (up to 4 Workers) is enabled automatically; otherwise it falls back to the main thread with identical results. |
Tips & Tricks
- Sequential batch naming: Set the export suffix to
_{n}to get originalname_1, originalname_2… with automatic de-duplication inside the ZIP. - Add a capture date to photos: Put
{date}in the watermark text and it is auto-replaced with today's date on export. - Control file size: For large phone photos choose JPG and limit the long edge to 1920 px — a single photo can drop from several MB to a few hundred KB.
- Preview = Export: The tiled random tilt/scatter uses a deterministic algorithm, so preview and per-image export results are exactly identical — no "looks good in preview, off on export" surprises.
- Offline use: After opening this site in Chrome/Edge, the address-bar "Install" icon turns it into a standalone app that works even without a network.
Keyboard Shortcuts
| Key | Action |
|---|---|
Ctrl + Z | Undo the last parameter change |
Ctrl + Y / Ctrl + Shift + Z | Redo |
← / → | Switch to previous / next image in preview |
| Preview scroll wheel / double-click | Zoom preview; drag to pan |
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