Compress Image

Make images smaller for web uploads, email, or storage limits.

JPG, JPEG, PNG, WEBP
up to 200 MB per file
Never uploaded

What Compress Image does

Reduce an image's file size while keeping it recognisably the same picture. Modern phone cameras produce files of several megabytes each, which is fine on the device and a problem everywhere else — mail servers that cap attachments, upload forms with a two-megabyte ceiling, and web pages that load slowly because nobody optimised the photos.

Quality against size, one 4000×3000 photo (4.8 MB)

Quality	Size	Where the difference shows
90	2.1 MB	Indistinguishable from the original
75	1.1 MB	Only in smooth gradients at 200% zoom
60	720 KB	Faint blocking in flat areas at 100%
40	430 KB	Visible around edges; fine for thumbnails

A target size ("under 200 KB") searches the quality first and only shrinks the pixels if quality alone cannot get there.

How it works

01
Upload image
Choose the JPG, PNG or WebP; it is never uploaded.
02
Pick a size
Enter the file size you need (e.g. 200 KB), or set a quality level.
03
Download
Get the compressed image.

When you'd use it

A profile photo that must be under 100 KB
Photos for a website that load too slowly
Attaching a batch of pictures to an email under its limit

Formats and limits

Accepts: .jpg, .jpeg, .png, .webp
Produces: Compressed image
Files per run: One
Size limit: 200 MB per file

Limitations

A target size is reached by lowering JPEG quality and then, if needed, by reducing dimensions in 10% steps — so a tiny target for a large photo means a smaller picture, not only a blurrier one.
PNGs with flat colours often cannot be shrunk much without converting to JPG; the tool tells you when it could not reach the target.

What happens to your file

Your file is never uploaded or stored.

Full detail in the Privacy Policy.

Questions

How do I get an image under a specific size?

Type the limit in the target size box — for example 200 with KB selected. DocsBolt lowers the quality just enough to fit, and only shrinks the dimensions if that alone isn't enough.

What quality should I use?

70 is a good balance. Lower = smaller file, higher = better quality. It only applies when you haven't set a target size.

How much smaller will my file get?

It depends heavily on the source. Photographs with lots of detail and gradients compress well, often by more than half. Images that are already compressed, or flat graphics with few colours, have less room and shrink far less.

Will I see the difference?

At normal viewing size, usually not. Compression discards detail the eye is least sensitive to. Zoom deep into a fine-detail area and you may see softening, which is why archival and print originals are worth keeping.

Can I compress the same image twice?

You can, but it is a bad idea. Each pass throws away more detail permanently, and repeated rounds visibly degrade the picture. Always compress from the original rather than from a previous output.

What is the smallest size I can reach?

It depends on the pixel dimensions. Quality is lowered first (down to about 30), then the image is downscaled in 10% steps; a 4000-px photo can go under 100 KB but will be a smaller picture. The tool tells you when a target could not be reached at all.

Do PNG screenshots shrink much?

Rarely. PNG is already lossless-compressed, so quality settings do not apply; only downscaling helps. For a screenshot that must be tiny, convert it to JPG or WebP instead — text edges soften slightly, but the file drops several times over.