Image Converter
Convert PNG, JPG, WebP and other browser-supported images with optional quality and resizing controls.
Drop images here
or click to choose one or multiple images from your device
PNG · JPG/JPEG · WebP · GIF · BMP · SVG · AVIF and other formats your browser can decode
Selected images
0 images selected
1. Choose output format
The selected format is applied to every image in the batch.
Output support depends on your browser. Unsupported formats are automatically disabled.
Used for JPG, WebP and AVIF when supported.
Images keep their aspect ratio and are not enlarged beyond their original size.
Estimated batch size
Updates when you change format, quality or resize settings.
Original files
Estimated converted size
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The “after” value is calculated from browser-generated conversions, so it closely reflects the files you would download.
Convert batch
Your images are ready to convert.
Good to know: choose Download all files for separate downloads or Download ZIP for one archive. Animated images are converted as a single still frame, and JPG fills transparent areas with white.
One image converter. A whole folder of possibilities.
Convert a single picture or an entire batch between popular image formats including PNG, JPG/JPEG, WebP and AVIF where supported by your browser. Change image quality, resize pictures, compare estimated file sizes before downloading, and grab your finished images individually or together in a ZIP archive.
The UtilityGlen Image Converter processes images directly in your browser, making it useful for preparing website graphics, shrinking photos, changing incompatible file types, converting transparent images, or processing multiple pictures without a complicated editing suite.
Same picture. New format.
PNG, JPG, WebP or AVIF — what should you convert to?
Image formats are built for different jobs. The best choice depends on whether you care most about transparency, compatibility, image quality or smaller file sizes.
PNG
A strong choice for graphics, screenshots, logos and images that need transparent pixels. PNG output in this converter is lossless, so the quality slider does not apply.
JPG / JPEG
Popular for photographs and broad compatibility. JPG uses lossy compression, so lowering quality can reduce file size. Transparent areas are filled with white when converted to JPG.
WebP
Useful for modern websites and web graphics. WebP can provide compact files while maintaining useful visual quality, and the converter lets you experiment with its quality setting.
AVIF
A modern image format available as an output when supported by your browser. Use the quality control to experiment with the balance between visual detail and file size.
Convert one image — or twenty — with the same simple workflow
No complicated export menus. Add your images, choose what you want them to become, check the estimated storage impact, and download.
Drop in your images
Choose one file or select multiple images at once. You can add more files later, remove individual images or clear the batch and start again.
Pick format, quality & size
Select PNG, JPG, WebP or supported AVIF output. For applicable formats, adjust image quality and optionally resize the entire batch while preserving aspect ratios.
Compare & download
Review the estimated before-and-after batch size, then download converted images separately or package the whole batch into a convenient ZIP archive.
Smaller isn't always automatic. Now you can see why.
Changing an image's format does not guarantee a smaller file. A compressed JPG converted to lossless PNG, for example, may become larger. That's why the converter calculates an estimated batch size using browser-generated conversions instead of simply assuming every conversion saves storage.
When the new files are smaller, the storage indicator shows how much space you may save. If the conversion increases the total size, it clearly reports how much larger the result is.
Example for illustration. Actual results depend on the source images, output format, dimensions, quality and browser encoding.
Built for real image-conversion jobs
Whether you're cleaning up a folder of website assets or converting one stubborn image, the workflow stays fast and understandable.
Batch image conversion
Upload multiple pictures and apply the same destination format, quality and optional resize settings to the entire collection. It's much faster than converting files one by one.
One ZIP. Less clicking.
Finished with a batch? Download the converted images separately or bundle them into one ZIP archive for easier storage and transfer.
Resize while converting
Set maximum width and height values for the batch while keeping each image's aspect ratio.
Browser-side processing
Image conversion is performed locally by browser APIs rather than sending the image to a conversion server.
Quality you can tune
Adjust quality for applicable JPG, WebP and AVIF conversions and watch the estimated output size respond to your settings.
From “this file won't upload” to “this folder is huge”
Image conversion solves plenty of small everyday problems. Here are a few places where changing format, quality or dimensions can help.
Website images
Convert image assets into formats better suited to your website workflow and experiment with quality to reduce unnecessary file weight.
Email & sharing
Resize oversized pictures or try a compressed output format before attaching a large collection of images.
Photo collections
Process multiple photographs with one shared output format and download the converted collection together.
Storage cleanup
Compare original and estimated converted sizes before committing, so you can see whether a conversion actually reduces storage.
Transparency matters.
Especially when you're converting PNG graphics, logos or interface assets.
What happens when a transparent image becomes JPG?
JPG does not support transparent pixels. When this converter creates a JPG from an image containing transparency, transparent areas are filled with white.
If you need transparency to remain intact, choose an output format that supports it, such as PNG. This is particularly important for logos, icons and graphics designed to sit on different background colors.
Questions before you hit convert?
Here's the useful stuff: formats, batch processing, quality, transparency, resizing, file sizes and downloads.
The image conversion itself is performed using browser-side processing.