Bulk Image Resizer
Prepare a whole folder of product shots or holiday photos for the web in one pass.
- Files never leave your device
- 100% free
- No sign-up
- No watermark
- Works offline after first load
or drag & drop a whole folder’s worth of images — or paste with Ctrl+V
How to resize many images at once
- Select or drop all your images at once — JPG, PNG, WebP, HEIC and more.
- Choose how to resize: a longest side (e.g. 1920 px), a width, a percentage or a preset, and the format and quality.
- Click Resize and download everything as one ZIP.
About Bulk Image Resizer
Resize a whole batch of pictures in one go — product photos, a holiday album or images for a website. Set the longest side, a width, a percentage or pick a preset; every picture keeps its own proportions, so portrait and landscape images both come out right.
Convert to JPG, PNG, WebP or AVIF on the way, set the quality or a maximum file size, keep or remove photo details, and download everything as one ZIP. It all runs in your browser, so even large batches stay private.
Good for
- Preparing product photos for an online shop
- Shrinking a photo album before emailing or uploading
- Making all website images the same width
Tip: “Longest side 1920 px” suits most websites and keeps every photo under a few hundred KB.
Frequently asked questions
How many images can I resize at once?
As many as your device can hold in memory — typically hundreds of photos. They are processed one after another and collected in a ZIP.
Will each image keep its proportions?
Yes. With “Longest side” or “Percentage”, or a width with the chain on, every picture keeps its own shape — portrait and landscape photos alike.
What is “longest side”?
The longer of width and height is set to your number — 1920 px makes landscape photos 1920 wide and portrait photos 1920 tall.
Can I convert the format at the same time?
Yes. Save as JPG, PNG, WebP or AVIF, set the quality, and optionally a maximum file size for every image.
Are small images enlarged?
Not if you tick “Don’t make small pictures bigger” — they are kept as they are.
Do my images leave my device?
No. All the resizing happens in your browser, so your pictures are never uploaded.