Is this bulk image processor free?

Yes, the FormatPotter Bulk Image Processor is 100% free with no signup, no watermark, and no hidden charges. Process unlimited images as many times as you want.

Do my images get uploaded to a server?

No. All processing happens entirely in your browser using the Canvas API and JSZip. Your images never leave your device, ensuring complete privacy.

How many images can I process at once?

There is no fixed limit. You can add as many images as your browser can handle — typically 50-200 images work smoothly depending on image size and your device's memory.

What operations can I apply to all images?

You can resize (longest side, fixed width, fixed height, percentage, or exact size), convert format (JPG, PNG, WEBP), compress with quality slider, add text watermarks, and rename files with auto-numbering.

Can I combine multiple operations at once?

Yes. You can enable any combination of resize, format conversion, watermark, and rename in one batch. Each operation applies sequentially to every image.

What image formats are supported?

You can upload JPG, PNG, or WEBP images up to 15 MB each. Output can be saved as JPG, PNG, or WEBP.

How are the processed images downloaded?

All processed images are packaged into a single ZIP file for easy download. You can also set a custom ZIP filename and rename files with a custom prefix.

Does it work on mobile phones?

Yes, the tool is fully responsive and works on smartphones, tablets, and desktop computers. For very large batches (50+ images), a desktop is recommended for best performance.

Will my image quality be reduced?

Not if you choose PNG format (lossless). For JPG and WEBP, you can control the quality with the slider from 10% to 100%. The default 82% offers an excellent balance of quality and file size.

Is the bulk image processor safe to use?

Absolutely safe. Since all processing is done locally in your browser, your images are never uploaded to any server. FormatPotter does not retain any copy of your files.