Reduce image file size while staying in control of quality. Toolmera processes the image locally and shows the size change before download.
Reduce image file size in your browser with adjustable quality and a before-and-after size comparison.
JPEG and WebP support adjustable lossy quality, so lowering the quality setting can reduce file size by discarding more visual detail. PNG works differently: its standard format is lossless and does not expose the same browser quality control.
In the current Toolmera compressor, PNG input is exported as WebP to achieve a meaningful size reduction. JPG remains JPG and WebP remains WebP.
There is no universal best quality number. Photographs, screenshots and flat graphics react differently. Use the before-and-after size together with a visual check, and stop lowering quality once edges, text, gradients or fine texture begin to look noticeably worse.
Compression changes how efficiently the image is stored. Conversion changes the file format. Resizing changes the pixel dimensions. If an image is much larger than the size it will be displayed at, resizing first and then compressing is usually the better workflow.
Choose files or drag and drop them into the batch area.
Choose the available quality or palette setting and start processing.
Review each output size and download the compressed files individually.
Useful next steps in the same workflow.
No. The compressor keeps the current width and height. Use Resize Image if you need different pixel dimensions.
The current Toolmera compressor exports PNG input as WebP because browser-based PNG does not expose the same adjustable lossy quality control.
Yes. The current batch workflow accepts up to four images at once and shows a separate result for each file.
If the image is larger than necessary, resize it first, then compress it. For PNG or JPG assets intended for the web, converting to WebP can also reduce size further.