Resize
Bulk image resizer
Resize entire folders of images at once in your browser. Parallel processing, ZIP download, no upload limits.
Drop images here
or · drop a folder · paste from clipboard
Drop a folder onto the box above and every image inside it is resized to the same rule. Files are processed in parallel across your CPU cores, and since nothing is uploaded there is no per-file cap, no total size limit and no daily quota.
For mixed batches — portrait and landscape shots together — use the "longest side" mode. One number bounds every image regardless of orientation, so a 4000×3000 landscape and a 1200×1600 portrait both come out correctly rather than one of them being squashed.
The preview above the settings shows exactly what dimensions the first image will produce, so you can confirm the rule is doing what you expect before committing to a folder of two hundred.
How to bulk image resizer
- Drag a folder of images onto the box above.
- Pick "longest side" and set a maximum, or choose exact dimensions.
- Click "Download all as ZIP" once the queue finishes.
Frequently asked questions
Are my images uploaded to a server?
No. The conversion runs inside your browser using WebAssembly, so the image data never leaves your device. That also means there is no queue, no account, and no file size cap imposed by a server.
How many images can I resize at once?
There is no hard limit. Very large batches of high-resolution photographs do use a lot of memory though, so on a phone it is worth splitting batches of more than about fifty 12-megapixel images.
Can I resize portrait and landscape images together?
Yes — that is exactly what "longest side" is for. It bounds the longer edge of each image individually, so both orientations are handled correctly from a single setting.
Can I convert several images at once?
Yes. Drop in as many files as you like — or a whole folder — and they are processed in parallel across your CPU cores. When they finish you can download them individually or grab everything as a single ZIP.