Utilities

Image Converter

Converts images between PNG, JPG, WebP, AVIF and BMP, resizes and crops them, in small batches, without uploading them.

Runs in your browser
Free to run

Open the tool

You enter: Up to 10 images (40 MB together), a format and size options.
You get: Converted files to download one by one or all at once.
A good result: Smaller files at the size you need, with no visible loss.

On this page

What it is for
What you enter
How it works
Reading the results
Example
Limits and gotchas

#What it is for

Prepare images for emails and feeds: smaller WebP banners, square product photos, JPGs without transparency.

#What you enter

Files: PNG, JPG, WebP, AVIF, GIF or BMP.
Output: PNG, JPG, WebP, AVIF or BMP (WebP and AVIF only when your browser can create them).
Quality: 40 to 100, default 90, for JPG, WebP and AVIF.
Maximum width and height: up to 8000 px. Images are never enlarged.
Aspect ratio: original, 1:1, 4:3, 3:2, 16:9, 9:16, 21:9, 2:3, 4:5 or 1.91:1, either keeping the full image or filling and cropping.
Background: a fill colour for transparent areas. JPG always gets one.

#How it works

Everything happens in your browser; files never leave your computer. Each image is drawn at the new size and saved in the chosen format with the original file name and the new extension.

#Reading the results

Each result shows the new size in pixels and bytes and the quality used. Compare file sizes before and after; if a WebP is larger than the JPG, lower the quality.

#Example

Settings

Files:   8 product photos (PNG)
Output:  WebP, quality 80
Size:    max width 1200
Ratio:   1:1, fill and crop

#Limits and gotchas

10 files and 40 MB per batch, then a 15 second pause before the next batch.
Download all saves the files one after another, not as a zip; your browser may ask to allow several downloads.
Animated GIFs are converted from their first frame only.