Compress Image
Drop images in, choose how much quality you can spare, and download smaller files. Compression runs on your device — the pictures are never uploaded.
or drop them here
- Free
- Files never leave your device
- No sign-up
- No file limit
How to use
- Select images or drag them into the box — up to 30 at a time, 50 MB each.
- Move the quality slider: 80% is the usual sweet spot for photos on the web.
- Check the saving shown next to each file — original size, new size and the percentage saved.
- Download the compressed files individually or all together.
Good to know
Why image weight matters
Images are usually the heaviest part of a web page and the most common reason for a slow Largest Contentful Paint. Cutting a 3 MB photo to 300 KB changes how fast the page feels on a phone far more than any script optimisation.
How much quality can you lose
At 80–90% quality the difference is invisible for photographs at normal viewing sizes, while the file often shrinks by two thirds. Screenshots, diagrams and images containing text are a different case: lossy compression smears thin lines, so keep those as PNG or use a gentle setting.
What the tool does not do
It re-encodes the image rather than optimising it losslessly, and it strips the metadata that the browser does not carry over — including EXIF, which is usually a privacy win. If you need the original EXIF preserved, compress with a desktop tool instead.
Frequently asked questions
Are my images uploaded anywhere?
No. Compression uses the Canvas API in your browser, so the files stay on your device and no server sees them.
How much smaller will my image get?
For photographs, typically 60–90% smaller at 80% quality. The exact saving is shown next to every file after conversion.
Does compressing reduce the resolution?
No. The pixel dimensions stay the same; only the encoding quality changes. Use the image resizer if you also need fewer pixels.
Can I compress PNG without losing transparency?
Transparency is preserved only when the output stays PNG. This tool re-encodes to JPG, which has no alpha channel, so transparent areas are filled with the chosen background colour.
How many files can I process at once?
Up to 30 files per batch, each up to 50 MB. Larger batches are better split in two so the browser stays responsive.
Is EXIF data kept?
No — camera and location metadata are dropped during re-encoding, which also makes the file smaller and removes a privacy risk when publishing photos.