Batch logo overlay
Apply one logo or watermark image to many images as a single mark, horizontal repeat, or diagonal repeat.
Upload images to watermark
JPG, PNG, WebP, HEIC · up to 20 files · 20MB each
You can paste copied images with Ctrl+V
Processed in your browser · no server upload
Watermark Image
Choose one logo, signature, or brand mark image.
Position and Output
Apply the same watermark settings to every uploaded image.
Placement mode
Watermark position
Examplesample-image.png
{name}=source filename, {index}=number. Leave blank to use the source filename.
Upload at least 1 target image to apply a watermark.
Usage criteria
Review what the tool changes and how to check the output before using it elsewhere. Comparing your inputs with the destination requirements helps prevent an otherwise valid result from being rejected.
Use this browser-based watermark tool when product photos, detail images, or social assets need the same logo or signature. Upload target images, choose one watermark image, tune single, horizontal, or diagonal placement, and download individual files or a ZIP.
Apply one watermark across a batch of images
After processing, review Image watermark, Diagonal/horizontal repeat, Individual/ZIP download, image watermark, add watermark to photos before using the result.
Image output depends on source dimensions, file format, compression quality, and transparency. Photos, logos, and text-heavy graphics can react differently to the same setting, so review both pixel dimensions and visible quality.
Core processing runs in the current browser whenever possible. OneClickTool does not store original files or tool inputs on its own server. Review the preview and output values before downloading or submitting an important result.
Yes. Upload target images, choose one watermark image, and apply the same placement mode, size, opacity, and spacing to the full batch.
Yes. Choose a single placement, horizontal repeat, or diagonal repeat, then adjust size, opacity, and spacing before exporting.
No. The watermark is composited in your browser, and original images are not uploaded to OneClickTool.
JPG, PNG, WebP, and HEIC images can be converted, compressed, resized, or prepared with presets.
RAW editing, SVG vector editing, and AI background removal are not currently supported.
Check the criteria before using the tool to review results faster.
Social ImagesPrepare a clear 16:9 YouTube thumbnail with readable text, safe cropping, balanced contrast, and an upload-ready file size.
E-commerce ImagesPrepare square product thumbnails with safe spacing, consistent backgrounds, readable details, and manageable file sizes.