Compress Images Locally in Your Browser
Export a local image with a different format or quality setting, then compare the result before you share it.
What compression changes
- File size can change: the amount depends on the image, its source format, and the settings you choose.
- Pixels can change: JPEG and WebP quality settings are lossy, so inspect the exported image at the size you will use.
- Format matters: transparency and repeated edits can affect which export is appropriate.
- Keep the original: save a copy before replacing a source file with an export.
JPEG vs WebP vs PNG
| Format | Best For | Compression | Transparency | File Size |
|---|---|---|---|---|
| JPEG | Photos | Lossy | No | Small |
| WebP | Web images | Lossy + Lossless | Yes | Varies by image |
| PNG | Graphics, screenshots | Lossless | Yes | Large |
| Current tool | Local export | JPEG, WebP, PNG | Depends on format | Shown after export |
Check the result: there is no universal best format or quality value. Review the exported image and its file size for your own use case.
Compare before you replace
Quality settings trade file size against visual detail. Start with a copy, export one setting, and inspect areas with text, edges, gradients, or fine texture before deciding whether it is suitable.
Local workflow: the browser compressor shows the source and exported file sizes after you run it. The selected image stays in the browser during this tool's processing.
Step-by-Step: Compress with OverlayPhoto
- Go to overlayphoto.com/tools/compress
- Select one suitable local image (drag and drop or click)
- Choose output format: JPEG, WebP, or PNG
- Adjust the quality slider for JPEG or WebP
- Run the export and compare the displayed source and exported sizes
- Download the compressed image
This current tool processes one selected image locally in the browser; it does not upload that image to an OverlayPhoto server.
Current batch limit
The experimental Batch Processor can resize, compress, convert, or enhance up to five suitable local files per selection while paid access remains unavailable. It does not promise a shared batch archive or a fixed result for every image.
Review a local export
Choose an image, compare the result, and keep the original when you need it.