Bulk Image Compressor
Compress multiple images at once with the same quality settings. Download individually or as a ZIP.
What is Bulk Image Compressor?
When you have dozens or hundreds of images that all need compression, processing them one at a time is tedious. Our bulk compressor lets you upload multiple images, set a single quality level, and compress them all with one click. Each image is compressed independently using the same quality setting, and you can download them individually or as a ZIP archive. This is ideal for optimizing a batch of product photos, compressing a folder of images for email, or preparing a set of images for web upload.
How to Use
- 1Upload multiple images by dragging them onto the drop zone or selecting multiple files.
- 2Set the compression quality using the slider.
- 3Click "Compress N Images" to process all files.
- 4Download individual compressed images or all as a ZIP archive.
Why Use This Tool
- ✓Batch processing — compress dozens of images with one click instead of processing them individually.
- ✓Consistent settings — apply the same quality level to all images for uniform results.
- ✓ZIP download — get all compressed images in a single convenient archive.
Frequently Asked Questions
How many images can I compress at once?⌄
There is no fixed limit — the constraint is your browser's available memory. In practice, 50-100 images work smoothly on most devices. Very large batches of high-resolution images may take longer to process or could cause memory issues on older devices.
Are all images compressed with the same quality setting?⌄
Yes. The quality slider applies the same compression level to all uploaded images. This ensures consistent results across the batch. If you need different quality settings for different images, process them in separate batches with different quality levels.
What format are the compressed images?⌄
Each image is compressed in its original format — PNG inputs produce PNG outputs, JPEG inputs produce JPEG outputs. PNG compression is lossless (quality slider does not apply), while JPEG and WebP compression uses the quality setting. The output format matches the input format.
How does the ZIP download work?⌄
After compression, a "Download All as ZIP" button appears. Clicking it bundles all compressed images into a single ZIP file using the JSZip library, then downloads it. The ZIP file is created in your browser — no server upload is involved.