How many images can I watermark at once?

There's no hard limit, but your browser's memory determines how many large images you can process. Most users handle 50-100 images without issues. For very large batches, process in groups.

Are my images uploaded to a server?

No. All processing happens locally in your browser using the Canvas API. Your files never leave your device.

Can I use a logo with a transparent background?

Yes. Upload a PNG with a transparent background in image mode. The transparency will be preserved when the logo is placed on each image.

What image formats are supported for input?

The tool accepts JPEG, PNG, WebP, and any other format your browser can display, which covers the vast majority of common image types.

Can I watermark photos in different sizes?

Yes. The watermark size scales proportionally with each image, so the watermark will look consistent across images of different dimensions.

Batch Watermark Images Online Free

Images Tool Box

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Images Tool Box

Free online image tools for compression, conversion, resizing, and more. No installation required.

Compression

Compress Image
Compress PNG
Compress JPG
Compress AVIF
Compress BMP
Compress WebP
Compress GIF
Compress TIFF
Video Compressor
MP3 Compressor
WAV Compressor
PDF Compressor
Image Quality Reducer
FLAC Compressor

Conversion

PNG to JPG
JPG to PNG
WebP to PNG
PNG to WebP
JPG to WebP
WebP to JPG
PNG to AVIF
JPG to AVIF
WebP to AVIF
AVIF to PNG
AVIF to JPG
BMP to PNG
BMP to JPG
JPG to ICO
PNG to ICO
JPG to BMP
PNG to BMP
Image Converter
TIFF to JPG
TIFF to PNG
TIFF to WebP
GIF Converter
GIF to MP4
GIF to PNG
GIF to Image
MP4 to GIF
Video to GIF
WebM to GIF
MOV to GIF
AVI to GIF
Image to GIF
PNG to GIF
Audio Converter
Video Converter
AVIF to WebP
ICO to PNG
SVG to PNG
SVG to JPG
SVG to WebP
HEIC to JPG
HEIC to PNG
HEIC to WebP
PDF to Images
JPG to PDF
HEIC to PDF
PDF to JPG
PDF to PNG
DOCX to PDF
EPUB to PDF
PDF to EPUB
PDF to Word
Merge Images to PDF
Batch Format Convert
RAW to JPG Converter
RAW to PNG Converter
RAW to WebP Converter
RAW to DNG Converter
RAW to TIFF Converter
FLAC to MP3
OGG to MP3
M4A to MP3
AAC to MP3
MP3 to FLAC
WAV to OGG
MP3 to M4A
OPUS to MP3
AIFF to MP3
WMA to MP3
MP3 to WAV
MP3 to OGG
WAV to MP3
MP3 to AAC
WAV to FLAC
FLAC to WAV
OGG to WAV
MKV to MP4
WMV to MP4
FLV to MP4
MP4 to WebM
WebM to MP4
MOV to MP4
MP4 to MOV
TS to MP4
M4V to MP4
AVI to MP4
MP4 to AVI
AVI to MKV
MKV to AVI
MOV to WebM
WebM to MOV
TS to AVI
AVI to TS
PPTX to PDF
XLSX to PDF
EPUB to MOBI
TXT to PDF

Resize

Resize Image
Social Media Resize
Batch Resize

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