Bulk Image Enlarger
Make small images bigger — 2×, 3× or 4×, or to a width — with sharp edges instead of blur. A whole folder at once, free.
Drop your images here
or select them from your computer — up to 200 at a time
You can also paste images with Ctrl+V
Supported formats: JPG, PNG, WebP, BMP, GIF or AVIF in — JPG, PNG or WebP out · max 30 MB per fileUp to 200 files · nothing is uploaded
BMP, GIF and AVIF are read and come back as JPG, PNG or WebP — a browser canvas cannot write them. Animated files are not accepted.
How to use
Add your images
Drop a folder onto the box above, or press Select images. They stay on your machine.
Choose how much
2×, 3× or 4×, or a width in pixels, and the kind of image. Every row shows its new size first.
Enlarge and download
Take one image, or the whole batch as a ZIP. Filenames and formats are kept.
Why stretched images look blurry
When a browser, a slide program or a website builder makes an image bigger, it uses a quick filter that averages neighbouring pixels. Enlarged a little, that is fine; enlarged two or three times, every edge turns soft and every diagonal goes blocky. This tool resamples with proper filters instead — the ones Google’s Squoosh uses, compiled to WebAssembly — so edges stay defined and lines stay straight.
Three methods, for three kinds of image
Photo — sharp is the default. It uses Magic Kernel Sharp, a filter designed to resize with built-in sharpening, so the result looks crisp without the bright outlines a separate sharpen step leaves around edges. Smooth uses Lanczos, the classic high-quality filter: slightly softer, which can flatter skin and gradients. Pixel art is a different idea altogether. It looks at the pattern around each pixel and redraws staircase edges as smooth lines, which is exactly right for game sprites, icons and retro graphics and wrong for photographs — so it is only offered at 2×, 3× and 4×.
What enlarging can and cannot do
Enlarging spreads the pixels an image has over a bigger canvas and calculates the ones in between. It cannot recover detail that was never captured: a tiny, blurry thumbnail comes out larger and smoother, not sharp. Tools that claim to add detail use AI models that guess what might have been there — and sometimes guess wrong. This one does not guess, so the result is always a faithful, larger version of your picture. It is the right tool for meeting a minimum size on a marketplace or a print order, for making small product shots fill a page, or for scaling up logos and pixel art cleanly.
Sizes, formats and limits
Choose a factor — 2× doubles each side — or type a width and the height follows. Every row shows the size it will come out at before you start. Each file keeps its format, and PNG and WebP keep their transparency. A result can be up to 10,000 pixels a side and 25 megapixels; a file that would be larger is marked in red rather than left to fail. To bring a batch down to a size instead, use the bulk image resizer, and to make the enlarged files lighter afterwards, the bulk image compressor.
Frequently asked questions
- Will enlarging add detail to my photo?
- No — and no honest tool without AI can. Enlarging spreads the pixels an image already has over a bigger canvas and works out the ones in between. What this tool does better than simple stretching is the in-between: edges stay crisp instead of going soft and blocky. A small, blurry photo comes out larger and smoother, not sharper than the original.
- Which method should I choose?
- Photo — sharp, the default, suits photographs, product shots and most images: it uses the Magic Kernel Sharp filter, which keeps edges crisp without the bright halos a separate sharpening step adds. Smooth uses Lanczos and gives a softer result, which can suit portraits and gradients. Pixel art is for game sprites, icons and screenshots of pixel graphics: it turns staircase edges into clean lines at 2×, 3× or 4×.
- What is the largest image it can make?
- Each result can be up to 10,000 pixels on a side and 25 megapixels in total — a 6000×4000 photo, or a 5000×5000 square. A file that would be larger is marked before you start, and fails on its own if you run the batch anyway; the rest carries on.
- Are my images uploaded?
- No. The images are enlarged in your browser by filters compiled to WebAssembly, running in a background worker, and never leave your computer.
- Does it keep transparency?
- Yes, for PNG and WebP: the filters work on the alpha channel too, so a logo on a transparent background stays on a transparent background. Each file keeps its format.
- Why does it process one image at a time?
- Because an enlargement is large: a 4× image has sixteen times the pixels of the original, and the browser holds the original, the result and a canvas at once. One at a time keeps a long batch from running a phone or laptop tab out of memory.