Reduce JPG file size while keeping JPG output and checking the actual size result before download.
Compress JPG and JPEG images in your browser with an adjustable quality slider and a real before-and-after size comparison.
Toolmera decodes the source JPG, draws the pixels to Canvas and exports a fresh JPEG at the quality level you choose. Lower settings generally reduce file size more but can introduce softness or compression artifacts.
There is no universal percentage saving because the result depends on how the source file was originally encoded and how much visual detail it contains.
A JPG that was already heavily optimized can sometimes become larger when re-encoded at a new setting. Toolmera compares the bytes and keeps the original file when the new JPEG would be larger.
The displayed before-and-after size is the useful measure for your specific image.
Resize Image changes pixel dimensions. Compress JPG keeps JPG but changes encoding quality. JPG to WebP changes the image codec entirely.
If a photo is far larger than its display size, resizing first and then compressing is often the more effective 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. Compress JPG keeps the current pixel width and height.
Toolmera keeps the original JPG bytes instead of giving you a larger re-encoded file.
No. Canvas re-encoding creates a fresh JPEG from pixels and does not copy the original EXIF metadata.
Yes. You can queue up to four JPG or JPEG images in one compression batch.