Nén ảnh
Giảm kích thước file JPG, PNG, WebP.
hoặc nhấp để duyệt file (hỗ trợ nhiều)
Compress Image is the fastest way to shrink JPG, PNG, and WebP files without losing visible quality. Drag an image in, choose a compression level, and download a smaller file in seconds. Everything runs locally in your browser — your photos are never uploaded to a server, so the tool is completely private and works even offline.
Frequently Asked Questions
Most photos shrink by 40–80% depending on the original format and the compression level you pick. JPG and PNG files with lots of detail compress the most.
At the Recommended level the difference is hard to see. You can move the quality slider higher for near-original quality or lower for the smallest file size.
No. All compression happens inside your browser using the Canvas API. Your files never leave your device, which keeps them fully private.
Reduce the file size of a photo while keeping it looking the same. Compression works by discarding the detail your eye is least likely to notice — fine gradations in smooth areas, and colour information at a finer scale than the brightness information. A photograph saved at quality 80 is typically a third to a quarter of the size of the same photograph at quality 100, and side by side at normal viewing size most people cannot tell them apart.
How it works
- Drop in one image or several at once — JPG, PNG, WebP and AVIF are all accepted.
- Pick a quality level. Light keeps almost everything, Recommended is the balance most photos want, and Strong goes further when the file size matters more than the last few percent of detail.
- Compare the before and after sizes, and the preview, before committing.
- Download the compressed files individually, or as a ZIP if you compressed a batch.
Good to know
Which quality to choose depends on the picture, not on a universal number. Photographs with lots of texture — foliage, fabric, gravel, skin — hide compression well and take Strong without visible damage. Images with large flat areas and hard edges, such as screenshots, logos, charts and text, show compression as faint blotches and ringing around the edges, and those are better served by PNG or by a light setting. If the image has text in it and the text starts to look fuzzy, that is the signal to step the quality back up.