Bulk Image Resizer

About this tool

Applies one resize rule and output format to a batch of JPG, PNG, or WebP images, processes every file locally, and packages the results into a ZIP.

Common use cases

• Resize product photos to a consistent maximum dimension before adding them to a store or marketplace.
• Prepare a folder of screenshots, documentation images, or website assets with one shared resize rule.
• Convert a mixed batch of JPG, PNG, and WebP inputs into one output format for a simpler handoff.

How to use it

1. Drop multiple JPG, PNG, or WebP images into the upload area.
2. Choose a max dimension, width, height, or percentage, then select the output format and quality.
3. Resize the batch and download individual results or the complete ZIP.

Best for

• Product images, screenshots, or document assets that need the same treatment in one run
• Folder-style workflows where downloading a ZIP is faster than repeating a single-image page
• Batch resizing before uploads, listings, or content operations

Input and output notes

• Accepted inputs: .jpg, .jpeg, .png, and .webp. Mixed input formats can be processed in the same batch.
• Choose max dimension, width, height, or percentage. Every mode preserves each image's original aspect ratio.
• The selected JPG, PNG, or WebP output format applies to every file in the batch. Original base filenames are retained with the new extension.

Resize every image with one shared rule

Set a maximum dimension, exact width, exact height, or percentage once and apply it across the batch. Aspect ratios are preserved independently, so portrait and landscape images can be processed together without stretching.

Choose JPG, PNG, or WebP output

• Choose JPG for broadly compatible photo output with adjustable quality.
• Choose PNG for lossless output or when transparent areas need to remain transparent.
• Choose WebP for modern image output that can balance visible quality and smaller files.

Example: resize 25 product photos

Add all 25 photos, select Max dimension, enter 1200, choose WebP, and set the quality. The tool preserves each photo's aspect ratio, processes the batch locally, and returns 25 resized files that you can download together as one ZIP.

Download the complete batch as a ZIP

Review the dimensions and before-and-after file sizes when processing finishes. Download any result separately, or use Download ZIP to package every resized image into one file while retaining each original base filename.

Limits to know

• Batch capacity depends on the dimensions of the source images and the memory available to the current browser tab.
• JPG output does not preserve transparency. Choose PNG or WebP when transparent pixels need to remain transparent.
• The tool applies one resize rule and output format to the entire batch; use the single-image resizer when files need different settings.

Privacy

Images are decoded, resized, and packaged into the ZIP in the current browser session. Source files and generated images are not uploaded to a processing server.

Common next steps