Bulk Image Resizer - Resize Many Photos at Once and Download a ZIP
Bulk Image Resizer
Resize a whole batch of pictures with the same settings
Drag & drop pictures here, or click to choose (up to 200)
One Setting, Every Picture
Choose how to resize once and apply it to a whole folder of photos of different shapes, keeping each picture's proportions.
Five Ways to Size
Set the width, the height, a box to fit inside, a percentage, or the longest side, which is the easiest way to get a consistent set.
Sharp Downscaling
Large reductions are done in several halving steps with smoothing, which keeps small details much better than one big jump.
Private and Offline
Pictures are resized on your device and packed into the ZIP there. Nothing is uploaded, and the resized copies carry no camera metadata.
Choosing a Size That Works
Smaller pictures load faster and fit email and upload limits, but only down to the size they will be shown at. A picture displayed 600 pixels wide on a web page needs about 1,200 pixels across to look sharp on high-density screens, and more than that is wasted bytes. For photos you will share, a longest side of 1,600 to 2,048 pixels is a common sweet spot; for thumbnails, 300 to 400 pixels; for a full-screen wallpaper, the screen's own resolution.
The "never make a picture bigger" option, on by default, leaves smaller pictures at their own size instead of blowing them up into a blurry version. Saving as JPEG or WebP at a quality around 80 to 90 gives a big size saving for photos, while PNG keeps screenshots and graphics with flat colours crisp. Transparent areas turn white when the output is JPEG. Because each picture is redrawn, its EXIF data (including any GPS location) is dropped, and photos taken sideways are turned upright first.
Key Takeaways
- Limits: Up to 200 pictures per batch and 16,384 pixels on a side.
- Output: Files are named photo-800x600.jpg, and duplicates in the ZIP are numbered.
- Related tools: See also the Image Resizer for one picture with a preview, and the Image Compressor.