How to Batch Resize Images Free (Bulk Resizing Options)

To batch resize images, first decide what you actually need. If you need smaller files (for email, an album upload or a shared drive), the free image compressor handles up to 20 photos at once and gives you a ZIP. If you need exact pixel sizes (every product photo 1200 px wide), our free image resizer does one image at a time, and with the tricks below each one takes a few seconds. For hundreds of files, your computer's built-in tools can resize a whole folder.

Here's how to choose, and how to make each route quick. The compressor and resizer both run in your browser, so nothing is uploaded.

Which do you really need?

People say "resize" for two different things:

You want	What changes	Best tool
Files small enough to email, upload or store	File size in KB/MB	Free image compressor, 20 at a time
Every image the same width or height in pixels	Pixel dimensions	Free image resizer, one at a time
Both	Pixels and KB	Resize, then compress the set

A lot of "bulk resize" jobs are really the first kind. A 4 MB phone photo saved as JPG at 70-80% quality often drops to well under 1 MB with no visible difference, without touching the pixel size. If that's all you need, you're done in one pass.

Route 1: Shrink up to 20 photos at once

1. Open the free image compressor.
2. Drop in up to 20 JPG, PNG or WebP images (each up to 50 MB).
3. Under Save as, pick JPG for photos, or WebP for a website.
4. Set Quality to 75-80%.
5. Click Compress 20 images (the button shows your count).
6. Check the total at the bottom, like Total 68.2 MB → 9.4 MB, then click Download all (ZIP).

Have more than 20? Click Start over and do the next 20. One catch: the compressor works at full pixel size, and most browsers refuse images above about 16.7 megapixels, so 48 or 50 MP photos from newer phones show a "too large for this device" message. Shrink those first with Route 2 (the resizer accepts them, as long as the new size is under that limit), or set your phone camera to its standard 12 MP mode. For sending a big set by email, our guide on compressing photos for email has target sizes.

Route 2: Exact pixel sizes, fast

The free image resizer works on one image at a time. Two habits make a set go quickly.

If your photos are all the same size (for example, all from the same phone), use Percentage:

1. Choose the first image.
2. Under Resize by, pick Percentage and type, say, 30. The tool shows the result, like = 1200 × 900 px.
3. Pick a format under Save as, click Resize image, then Download image.
4. Click Choose another image and pick the next one. The percentage you typed stays set, so you only need to click Resize image and Download image again. Check Save as each time, because it switches to match each new file's format.

Every photo of the same original size comes out at exactly the same pixel size.

If your photos are different sizes but need the same width (product listings, a team page):

1. Choose an image, keep Pixels and Lock proportions on.
2. Type the width, for example 1200. The height fills itself in.
3. Click Resize image, then Download image.
4. Click Choose another image and repeat. The width box resets to each new image's own size, so retype your width.

Each file is named with its new size, like chair-blue-1200x900.jpg, which makes it easy to check the set afterwards.

Need identical width and height?

For a listing grid where every photo must be, say, 1000 × 1000, proportions differ between photos, so resizing alone would stretch some. Crop each one to the shape first with the free image cropper (Square 1:1, Portrait 4:5 and others), then resize with the lock on. Our aspect ratios explained helps you pick the shape.

Route 3: Your computer's built-in batch tools

If you regularly resize dozens or hundreds of files at once, a desktop tool is worth knowing:

• Mac: open all the images in Preview, select them all in the sidebar, then choose Tools > Adjust Size and enter a width. Every selected image is resized.
• Windows: Microsoft's free PowerToys add-on includes Image Resizer, which adds a "Resize with Image Resizer" option when you right-click a group of selected images.

These change files in place or make copies depending on settings, so try them on a copied folder first. Afterwards you can still run the results through the free image compressor to cut the file size further.

Sensible widths for common jobs

Job	Width	Then
Online shop product photos	1000-1600 px	Compress as JPG or WebP at 80%
Photo album or family drive	2000-2500 px	Compress as JPG at 80%
Website blog images	About the column width, often 1200 px	Save as WebP
Email attachments	1600 px	JPG at 75-80%
Social media	See social media image sizes

Making images smaller in pixels is safe; making them bigger can't add detail. More in resizing without losing quality.

The quick way

For smaller files, drop up to 20 photos into the free image compressor and download the ZIP. For exact pixel sizes, open the free image resizer, set a percentage or width, and work through your set. Both are free, need no sign-up and keep your photos on your device.