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CrateX.app

Image Watermarker

Add text or logo watermarks to images locally in your browser with batch upload, single or tiled layouts, placeholders, opacity, scale, rotation, HEIC/HEIF input, PNG, JPEG, or WebP output, and ZIP download.

Drag & drop images here or click to select

Supports PNG / JPEG / WebP / AVIF / HEIC / HEIF input; watermarked results export as PNG / JPEG / WebP output

File count

0 / 10

Total size

0 bytes / 150 MB

Single-file limit

25 MB
Image Watermarker

Quick Start

1
Import images: Select PNG, JPEG, WebP, AVIF, HEIC, or HEIF files
2
Choose watermark: Use text or logo; enter text or upload a logo image
3
Set layout and style: Choose single or tiled placement, opacity, scale, and rotation
4
Generate batch: Choose PNG, JPEG, or WebP output, then process the images
5
Download results: Save individual files or download all as a ZIP

Common Scenarios

Copyright attribution

Add author name or copyright notice

Brand identity

Add logo watermark for product images

Use tiled mode for visual deterrence

cover the image and reduce casual reuse, while understanding that visible watermarks are not legal or technical locks

Watermark Options

Watermark type: Text watermark with custom text style; Logo watermark uses uploaded image
Watermark text: Supports placeholders {filename}, {index}/{total}, {date}
Font settings: Size, color, font, bold, stroke, shadow
Logo image: Recommend high-resolution transparent background image
Layout: Single uses one 9-position anchor; tiled repeats the watermark by spacing
Position: 9-position anchor (single mode only)
Margin: Distance from edge (not available when centered)
Opacity: 0–100%, controls watermark visibility
Scale: Logo as percentage of image short edge, text as font size multiplier
Rotation: -180° to 180°
Tile settings: Horizontal/vertical spacing, offset X/Y, diagonal tiling
Output format: PNG/JPEG/WebP; quality only applies to JPEG/WebP; HEIC/HEIF is input only

Usage Advice

Enable stroke/shadow/background box to improve text readability
Text watermark supports placeholders: {filename} (filename) {index}/{total} (sequence) {date} (date)
Use high-resolution transparent background logo, avoid excessive enlargement
Increase spacing if tiles too dense, use offset or diagonal for staggering

Limitations & Compatibility

Large images or large batches may take longer, batch in groups recommended
Processing may fail if output pixels too large, resize images first
Font rendering depends on local fonts, falls back to fallback fonts if unavailable
This is not a watermark remover and does not erase existing marks from images
Visible watermarks help attribution and visual deterrence, but they are not legal DRM and cannot guarantee theft prevention
This tool exports still images only: no video/PDF/SVG, animated GIF, RAW, or PSD processing
Export re-encodes image pixels, so metadata preservation is not reliable.

Privacy & Security

Image watermarking runs in your browser. Source images and the logo image stay in page memory while this tool is open. Watermark text, layout, position, style, tiling, output format, quality, and JPEG background settings may stay in browser storage; if WebDAV sync is enabled, those text and settings may sync according to your settings. Image and logo files are not synced by default; they only enter WebDAV attachment sync when you explicitly enable attachment sync. Watermarked files are generated for individual downloads or ZIP and are not stored as separate results. On shared devices, clear images, logo, results, saved settings, and site data when needed.

FAQ

6

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All tool processing happens locally in your browser.