Resize & Watermark
Resize a batch of images and stamp an optional watermark in one pass, all in your browser. Pick pixels, a percentage, a box to fit, or a platform preset, then download as PNG. Nothing is uploaded.
Drop images here, click to choose, or paste
Everything is processed in your browser. Nothing is uploaded.
How to resize a batch
- Drop your images in, then pick a resize mode: fixed pixels, a percentage of the original, fit-a-box that keeps the aspect ratio, or a platform preset (Instagram, Open Graph, Naver, Coupang, Amazon, Shopify) for that platform’s exact dimensions.
- Where the source and target aspect ratios can differ — fixed pixels, fit-a-box, or a preset — the mode shows its own fill style: fit inside without cropping, crop to fill, or extend a blurred background behind the uncropped image.
- Optionally add a watermark image and set its opacity, size, and corner.
- Process the batch and download. Output is PNG: lossless, and transparency is preserved.
When to use it
Social and marketplace platforms expect exact dimensions and will reject or awkwardly crop anything else. The presets stamp a whole set of product or post images to Coupang’s 1000×1000 or Instagram’s 1080×1350 in a single pass, so every listing lines up without cropping each file by hand.
The watermark step brands or protects a batch all at once: drop a logo in, set it low-opacity in a corner, and it lands identically on every image. Pick “Blurred background fill” when your sources have mixed dimensions but all need to fill one fixed frame without cropping the subject or stretching it.
Frequently asked questions
What resize modes are there?
Fixed pixels with stretch, crop, or a blurred background fill; percentage scale; fit-a-box that preserves aspect ratio; and platform presets with crop or blurred background fill.
Can I resize for a specific platform?
Yes. Choose Platform preset as the resize mode, select a common Instagram, Open Graph, or marketplace size, then choose crop or blurred background fill.
How does the watermark work?
Add a watermark image, set its opacity and size relative to the picture width, and place it on a 3×3 grid of positions. It’s composited in your browser.
What format are the results?
PNG, which is lossless and keeps transparency. Every image is processed locally and nothing is uploaded.