Compress and resize many images at once
Add a folder's worth of photos, set the format, size and limit once, and download everything as a single ZIP. The images never leave your device.
- No signup
- Your images stay on your device
- Free, no watermark
Drop an image hereAdd an image
or
Choosing several images switches to batch mode.
- JPG
- PNG
- WebP
- AVIF
- HEIC
Drop images hereChoose images
or
Add up to 100 images. They're processed on your device, never uploaded.
- JPG
- PNG
- WebP
- AVIF
- HEIC
How to compress images in bulk
- 1
Add the images
Drop up to 100 JPG, PNG, WebP, AVIF or HEIC files, or choose several at once.
- 2
Set the rules once
Choose the format, maximum dimensions, size limit and file names. They apply to every image.
- 3
Optimize and download
Follow the progress per image, then download all results as a ZIP.
One set of settings, every image
Batch mode applies the same rules to the whole list. Keep each image's format or convert them all, fit them within a maximum size, give them all an exact size, or scale them by a percentage.
With a size limit, PixMino searches the best quality for each image separately. Keep “Reduce dimensions when an image can't reach the limit” on and it also finds the largest size that fits for the images that need it.
Names that stay organised
Keep the original names, or use a pattern with {original}, {number}, {width} and {height}. A pattern such as product-{number} gives product-001.jpg, product-002.jpg and so on. PixMino previews the names before you start and never creates two files with the same name.
Honest results, image by image
Each image shows its own status: done, over the limit, failed or cancelled, with the reason. A damaged file doesn't stop the others. When the batch ends you get a summary such as “47 completed, 2 failed, 1 cancelled”.
The ZIP includes only the images that meet your settings. Images that stayed over the limit can still be downloaded one by one.
Built for your device's memory
PixMino processes up to two images at a time on computers and one at a time on phones, and releases each image as soon as it's done. You can cancel at any moment and keep what's already finished.
Supported formats
PixMino opens five formats and saves four. HEIC photos from iPhones are saved as JPG or PNG.
JPG
- Best for
- Photos and images with soft gradients.
- Transparency
- Not supported.
- Compression
- Lossy, with adjustable quality.
PNG
- Best for
- Screenshots, logos and graphics with sharp edges or text.
- Transparency
- Supported.
- Compression
- Lossless. Can use fewer colours where the change is invisible.
WebP
- Best for
- Websites that need small files.
- Transparency
- Supported.
- Compression
- Lossy, usually smaller than JPG at similar quality.
AVIF
- Best for
- The smallest photo files for modern websites.
- Transparency
- Supported.
- Compression
- Lossy, often smaller than WebP. Slower to create.
HEIC
- Best for
- Photos taken on iPhone and iPad. Opened by PixMino, saved as JPG or PNG.
- Transparency
- Not used by camera photos.
- Compression
- Lossy and very efficient, but poorly supported outside Apple devices.
AVIF and HEIC use codecs downloaded the first time you need them; after that they work offline. Animated images are converted as a single frame.
Questions
How many images can I process at once?
Up to 100 per batch, each up to 50 MB. Start a new batch for more.
Are my images uploaded to a server?
No. Every image is processed by your browser, and the ZIP is created on your device.
What happens if one image fails?
It's marked as failed with the reason, and the rest continue. Select Optimize again to retry the failed and cancelled images only.
Can I convert HEIC photos in bulk?
Yes. Add the HEIC files and keep Format on Keep or choose JPG: HEIC photos are saved as JPG.