Can I resize an entire folder of images?

Yes. Select a folder of images to apply one resize workflow across the collection. You can also import a ZIP archive containing images. Practical batch capacity depends on your device memory, browser, image sizes, and selected output settings.

Can I resize images inside a ZIP file?

Yes. Import a ZIP archive containing images, choose resize settings, and download the processed results as a ZIP archive. Processing similar image types together usually gives more consistent results.

How do I make all images the same size?

Use exact width and height settings, then choose how the tool should handle aspect-ratio differences. Choose crop to fill when every image must fill the same frame, add padding when the full image must remain visible, or stretch only when distortion is acceptable.

Can I set exact width and height?

Yes. Use exact dimensions to set a specific width and height in pixels. If the original image ratio differs from the target ratio, choose whether to preserve the ratio, crop to fill, add padding, or stretch to the exact dimensions.

How do I preserve the original aspect ratio?

Choose the keep-aspect-ratio or fit option. The image scales proportionally, so it is not distorted. Depending on the target box, the resulting image may not use the full requested width and height unless you add padding or crop to fill.

What happens if my target dimensions have a different aspect ratio?

You can preserve the full image by fitting it within the target box, fill the target by cropping outer areas, add padding around the image, or stretch the image to the exact dimensions. Choose the option based on whether full content visibility, a uniform canvas, or exact dimensions matters most.

Can I resize images without uploading them?

Yes. Images are processed locally in your browser and are not sent to the BulkPicTools server. Practical processing capacity depends on your device, browser, image dimensions, and selected settings.

Which image formats are supported?

The tool supports JPG, PNG, WebP, AVIF, and other formats supported by your current browser and selected output options. Available input and output formats are shown in the tool interface.

Can I resize images and reduce file size at the same time?

Yes. You can reduce pixel dimensions and use output quality, format, or target file-size settings to reduce file size in the same workflow. If every file must stay below one fixed size, use a dedicated tool such as Compress to 200KB or Compress to 1MB after resizing.

Does resizing reduce image quality?

Downsizing reduces the number of pixels, which is usually appropriate when the final display size is smaller. Enlarging an image requires interpolation, so it can make the result look softer because new detail cannot be recovered from the original. Keep the original source file if you may need a larger output later.

What is the difference between resizing, cropping, and compressing?

Resizing changes pixel dimensions. Cropping removes part of the visible image area. Compression reduces file size by changing encoding, quality, format, or dimensions. Use Image Cropper to choose a visible area, and Bulk Image Compressor when your main goal is reducing file size.

BulkPicTools

Local · 0 Uploads

Bulk Image Resizer

Resize images, folders, and ZIP archives locally in your browser. Set exact dimensions, percentage, longest side, or target file size while controlling aspect ratio, crop, padding, and output format.

Drag & Drop Images

JPG, PNG, WebP • Batch Resize

Exact dimensions · Aspect ratio controls · Folders & ZIP files · Local processing

Key Features of Bulk Image Resizer

Resize Images, Folders & ZIP Files

Add individual images, select a folder, or import a ZIP archive. Apply the same resize settings across a batch and download the results as a ZIP.

Exact Pixels, Percentage or Longest Side

Resize by exact width and height, scale by percentage, set a longest-side limit, or use a target file size when the final upload has a strict size requirement.

Control Aspect Ratio Behavior

Keep the original aspect ratio, fit within a box, crop to fill, stretch to exact dimensions, or add padding when every output needs the same canvas size.

Choose the Output You Need

Keep PNG transparency when you choose PNG output, create JPG files for photos, or export WebP and AVIF for modern web workflows when supported by your destination.

Parallel Batch Processing

Resize multiple images in parallel in your browser. Practical processing capacity depends on your device, browser memory, image dimensions, and selected settings.

Local Browser Processing

Your images are processed on your device and are not sent to the BulkPicTools server. No account is required, and there are no server-side upload queues or file quotas.

Guides & Tips

Resize Images, Folders and ZIP Archives in Bulk

This Bulk Image Resizer lets you apply the same dimensions and resize rules to many files at once. Add individual images, select an image folder, or import a ZIP archive. Processing takes place locally in your browser, and you can download the resized results individually or as a ZIP archive.

Add images, a folder, or a ZIP archive
Choose the workflow that matches your files. Use individual file selection for a small set of images, folder input for an image collection, or ZIP import for an existing archive of assets.
Choose your resize method
Set exact width and height, scale by percentage, set a longest-side value, or use a target file size. Then choose whether to preserve the original aspect ratio, crop to fill, stretch to exact dimensions, or add padding.
Apply settings to the batch
The same resize rules are applied to every image in the batch. This is useful when product photos, blog images, screenshots, or client assets need consistent dimensions.
Review and download
Check the output dimensions and file sizes, then download selected images individually or save the completed batch as a ZIP archive.

Because processing happens in your browser, original image files are not sent to the BulkPicTools server. Practical batch size and processing speed depend on your device memory, browser stability, image dimensions, and selected output settings.

Exact Dimensions, Percentage, Longest Side, or Target File Size

Different image tasks need different resize methods. Choose the method that matches the final requirement instead of changing dimensions manually one image at a time.

Resize method	Best for	What it changes
Exact width and height	Images that must fit a defined canvas or import specification	Sets a chosen width and height. Use crop, stretch, or padding options when the original ratio differs.
Percentage	Reducing a batch proportionally without choosing exact output pixels	Scales every image relative to its original dimensions while preserving its original ratio.
Longest side	Mixed landscape and portrait batches that need a consistent maximum size	Sets the longest edge to one value and scales the shorter edge proportionally.
Target file size	Uploads with a KB or MB maximum	Balances dimensions and output encoding to aim for a chosen file-size target.

Use exact dimensions when every image needs the same pixel size. Use percentage or longest-side resizing when each image should retain its natural proportions. Use a target file size when the upload system cares more about KB or MB than pixels.

If every output must stay below one strict limit, use a dedicated fixed-target tool such as Compress to 50KB, Compress to 200KB, Compress to 1MB, or Compress to 2MB.

Keep Aspect Ratio, Crop to Fill, Stretch, or Add Padding

When your original image has a different aspect ratio from the target dimensions, you need to decide what should happen to the extra space. The best option depends on whether preserving the entire image, filling the canvas, or enforcing an exact output size matters most.

Option	Best for	Result
Keep aspect ratio	Images that should not be distorted or cropped	The image scales proportionally. The final dimensions may be smaller than one side of the requested box.
Fit within a box	Mixed image orientations and flexible layouts	The full image remains visible and fits inside the target bounds without stretching.
Crop to fill	Uniform cards, thumbnails, and grids that need every image to fill the same frame	The canvas is filled, but outer image areas may be cropped.
Add padding	Product images, catalogs, and consistent canvases where the full image must remain visible	The full image is preserved with added space around it to reach the exact dimensions.
Stretch to exact dimensions	Assets where exact dimensions matter more than proportional geometry	The image fills the requested width and height but may look distorted when ratios differ.

For example, when you need all product images to be square, use padding if the full product must remain visible, or crop to fill if every grid cell must use the full square canvas. Use the Image Cropper when you need to choose the crop area manually before batch resizing.

Make All Images the Same Size

Bulk resizing is especially useful when a group of images needs a consistent width, height, or canvas size. This is common for product catalogs, website image grids, presentation slides, content libraries, and document attachments.

Your goal	Recommended settings
Every image must have the same width and height	Set exact width and height, then choose crop to fill, padding, or stretch based on the desired result.
All images should fit inside one maximum size	Use fit within a box or longest-side resizing with aspect ratio preserved.
Landscape and portrait images need consistent display scale	Set the longest side to one value so each image keeps its original ratio.
Images need to be smaller but keep their relative proportions	Use percentage resizing, such as 50% or 75% of the original dimensions.

When standardizing a large set, process similar image types together. For example, use one batch for product photos with square padded output and another batch for landscape editorial images with a maximum longest side. This prevents one setting from being a poor compromise for every file in the collection.

Resize vs Crop vs Compress

Resizing, cropping, and compression can all make an image easier to use, but they solve different problems. Choosing the right tool prevents unnecessary quality loss or unwanted changes to the composition.

If you need to...	Use	What changes
Change width and height in pixels	Bulk Image Resizer	Image dimensions
Make every image the same size	Bulk Image Resizer	Canvas size, ratio handling, and output dimensions
Remove part of an image	Image Cropper	Visible image area and composition
Reduce KB or MB without a fixed size requirement	Bulk Image Compressor	Encoding, format, quality, and optionally dimensions
Keep every result below a fixed limit	Fixed-size compressor	File size target, usually with format and quality adjustments

For the best result under a strict file-size limit, resize first when the original image dimensions are much larger than needed, then compress the resized image. Reducing pixels before applying stronger compression often preserves more useful visual detail than trying to compress a full-resolution image directly.

Local Batch Resizing and Privacy

This tool resizes images in your browser rather than sending the original files to the BulkPicTools server. The browser handles image decoding, dimension changes, crop or padding behavior, conversion, and result generation on your device.

Local batch processing can be useful when you work with client assets, pre-release product photos, personal images, internal documentation, or large image collections that you prefer not to upload to a third-party image-processing service.

Your browser still needs to load the page and its application resources. Performance depends on your device, browser, available memory, file dimensions, output format, and the number of images being processed. For demanding batches, a desktop browser with sufficient available memory is usually more comfortable than a mobile device.

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How to use

Add Images, a Folder, or a ZIP

Select individual files, choose a folder, or import a ZIP archive. The tool supports JPG, PNG, WebP, AVIF, and other formats supported by your browser and selected output options.

Choose How to Resize

Set exact width and height, scale by percentage, define the longest side, or set a target file size. Choose how the tool handles aspect ratio: fit, crop, stretch, or add padding.

Resize and Download

Process images in parallel, review the output dimensions and file sizes, then download individual images or save the completed batch as a ZIP archive.

Frequently Asked Questions About Bulk Image Resizer

Yes. Add multiple images, a folder, or a ZIP archive, then apply the same resize settings across the batch. You can download individual results or save the completed batch as a ZIP archive.