PhotoResizer

Dimension tool

Bulk Image Resizer Online

Bulk Image Resizer Online resize up to 20 JPG, PNG or WebP images together, choose dimensions, and download the finished batch as a ZIP.

Up to 20 images · ZIP downloadPrivate on-device processingActual result shown
  1. 1Choose image
  2. 2Adjust
  3. 3Download

Private by design. Your image is processed locally in your browser and is not uploaded to our server.

Purpose

What this tool does

This bulk image resizer applies one set of dimensions, fit rules, crop position, and output format to as many as 20 JPG, PNG, or WebP files. Images are processed sequentially to control memory use, each result is reported separately, and successful outputs can be downloaded together as a ZIP without uploading source files. You can enter the dimensions or file-size limit needed by your form. Processing happens entirely on your device — your image is decoded, resized, compressed, and prepared for download without being uploaded to any server.

Output

Supported formats and output

Upload JPG, PNG, or WebP. Choose JPG for broad form compatibility and smaller files, WebP where it is accepted, or PNG when transparency and lossless output matter more than an exact KB target.

The result card reports the actual pixel dimensions, format, and file size rather than assuming the target was reached. You can verify the output before downloading.

Detailed instructions

How to use it

  1. 1

    Choose one image or a batch of up to 20 local JPG, PNG, or WebP files.

  2. 2

    Review and adjust the dimensions and crop position to frame your subject without stretching.

  3. 3

    Select the output format, tap Prepare Image, verify the result visually, and download it to your device.

Before uploading

Common limitations

Cropping to a different aspect ratio removes edge content, while stretching can distort the subject. Crop-to-fill is recommended when the image must fill the frame; contain preserves the whole image and adds transparent or background-colored space when the proportions differ.

Very large photos can exceed a phone's available memory. If processing fails, try a smaller source image. PNG cannot be compressed by changing quality like JPG or WebP.

Privacy

Private browser processing

Your selected image is decoded, resized, compressed, and downloaded locally in your browser. Normal tool operation does not upload the image or its original filename to our server. The processed result stays on your device until you choose to save or share it.

Practical guidance

The importance of correct image sizing

A bulk image workflow is useful when product photos, application documents, social assets, or website images need the same dimensions and output format. Select up to 20 JPG, PNG, or WebP files, configure the width and height once, then choose crop-to-fill, contain, or explicit stretch. PhotoResizer processes the queue sequentially instead of decoding and transforming every source simultaneously, which keeps peak memory use more predictable on phones and laptops. The result list reports each file separately, so one unsupported or oversized source does not hide the status of the rest. Successful outputs can be saved individually or combined into a ZIP. The enforced limits—25MB per file, 150MB per batch, and 120 million source pixels—are stability controls rather than marketing claims. Source images remain on your device during normal processing.

Frequently asked questions

How many images can I resize at once?

You can select up to 20 JPG, PNG, or WebP images. Each file can be up to 25MB, while the batch is limited to 150MB and 120 million source pixels to protect browser stability.

Are bulk images uploaded to a server?

No. Normal resizing and conversion run locally in your browser. Files are processed sequentially on your device and are not uploaded to our server.

Can I download all resized images together?

Yes. After processing, verify the status, dimensions, format, and size of each result. Successful files can be downloaded individually or packaged together in one ZIP.

Does one setting apply to the entire batch?

Yes. The selected dimensions, fit mode, crop reference, background, and output format apply to every image. Review mixed portrait and landscape batches because one crop position may frame them differently.

Why are bulk images processed one by one?

Sequential processing reduces peak memory use and lowers the risk of a browser crash. Very large batches can still exceed a phone's available memory, which is why file, byte, and pixel limits are enforced.