Bulk Image Watermark
Watermark multiple JPG, PNG, and WebP images with your logo in the browser. Nine-position grid, scale, opacity, and rotation. 100% client-side ZIP download, private and free.
- Free
- No Signup
- No Daily Limit
- Browser-Based
- No Server Upload
- Fast Processing
- Works on Mobile
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How to batch watermark images in your browser
Step 1: Drag and drop multiple background photos (JPG, PNG, or WebP) into the upload zone.
Step 2: Upload one logo image — PNG with transparency works best.
Use the control panel to pick one of nine positions, adjust logo size (5–50% of image width), opacity (10–100%), and rotation (-180° to 180°).
Click "Add logo & download" to watermark every image in parallel with Canvas. SnapKit packages the results into SnapKit_Watermarked_Images.zip and starts the download automatically.
All processing runs locally in your browser. Your brand assets never leave your device.
Why choose SnapKit? Our tools are 100% private, browser-based, and free to use with no signup and no daily limit. Whether you merge PDFs, convert HEIC photos, or trim MP4 clips, your files stay on your device with zero cloud storage.
When should you use this tool?
Watermark multiple JPG, PNG, and WebP images with your logo in the browser. Nine-position grid, scale, opacity, and rotation. 100% client-side ZIP download, private and free.
Is my data uploaded to the server?
No. SnapKit processes your files entirely in your browser using client-side WebAssembly, Canvas, and Web APIs. Your documents, images, and audio never leave your device, and we do not store uploads on our servers.
Why choose SnapKit?
Every tool is built around four promises: privacy, speed, freedom, and accessibility. No cloud pipeline — just your browser and your files.
100% Private — No Server Upload
Files are processed on your device with client-side WebAssembly and Canvas. No bytes are sent to our servers.
Instant Browser-Based speed
Skip slow uploads and downloads. Your CPU and GPU do the work locally for near-instant results.
No File Size Limit — Free forever
No registration walls, no watermarks, and no arbitrary caps. Use ringtone, video, PDF, and image tools freely.
Works on every device
iPhone, Android, Windows, and Mac browsers are all supported with the same private, instant experience.
Frequently asked questions
Can I watermark many images without uploading to a server?
Yes. Canvas and JSZip run entirely in your browser. Background photos and your logo are never sent to a cloud server.
What logo format should I use?
PNG with transparency is ideal. JPG and WebP logos are also supported.
Can I place the logo in different corners?
Yes. The 3×3 position grid covers all nine anchors — corners, edges, and center — with a 20px margin from the edges.
Is my data safe with this tool?
Yes. All processing runs 100% on your device using the Canvas API. No bytes are transmitted to our servers.
Why is batch watermarking fast?
Images are processed in parallel with Promise.all on your device CPU, with no network upload delay.
Why is the processing speed so fast?
Because your file never leaves your browser. SnapKit uses WebAssembly and Canvas to harness your device CPU and GPU directly, skipping slow network upload and download steps.