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Bulk Image Resizer
Resize a whole folder of images at once and get a ZIP back.
Drop images here, or
Add as many images as you like — they are all processed locally.
Runs entirely in your browser. Nothing you paste is uploaded, logged, or stored.
How to use it
- Add as many images as you need — drop them all at once.
- Pick how to resize: longest edge, exact width, or a percentage.
- Choose an output format and quality.
- Resize the batch and download the ZIP.
What it does
Processes a whole batch of images in one pass and packages the output as a ZIP. Because everything happens locally there is no upload queue, no file-count limit, and no size cap beyond what your machine's memory allows.
Three ways to size a batch
- Longest edge — fits every image inside a square bound, keeping ratios and never upscaling. The safest choice for mixed portrait and landscape sets.
- Exact width — forces one width and derives each height. Good for a blog or catalogue where column width is fixed.
- Percentage — scales everything relative to its own size, preserving the variety in the set.
FAQ
- Are my images uploaded to a server?
- No. Every tool here decodes and re-encodes your file using your browser's own Canvas APIs. The image never leaves your device, which is also why it works offline once the page is loaded.
- Is there a limit on how many images I can add?
- No hard limit. Since processing happens in your browser, the practical ceiling is your device's memory. Several hundred typical photos is fine; very large batches are better split in two.
- What happens if two files have the same name?
- The tool appends a counter so nothing gets silently overwritten inside the ZIP.