Compress an image to a specific file size

How PixMino reaches the limit

JPG, WebP and AVIF files get smaller as their quality setting goes down, but the size each setting produces depends on the image. Instead of applying one fixed quality, PixMino encodes your image a few times and narrows in on the highest quality whose file is at or below your limit.

For a 100 KB limit, a run might try 90% (184 KB), 70% (91 KB), 75% (106 KB) and 72% (99 KB), then keep 72%. Every attempt is listed under “How PixMino got there” in the result.

The size PixMino reports is the size of the file you download, counted in bytes. It isn't an estimate.

When an image can't get small enough

A large photo can stay above a small limit even at low quality, because it still has millions of pixels to store. PixMino doesn't hide this. The result is marked as over the limit and you get a concrete recommendation, such as “Suggested: reduce to 1600 × 1200”, which you can apply in one click.

• Apply the recommendation: the largest width and height, at the same proportions, that meets the limit.
• Allow stronger compression: lets quality drop below what the selected mode normally allows.
• Try another format: WebP and AVIF are often smaller than JPG at similar quality.

Choosing a limit

Use the number your form or platform asks for. PixMino counts 1 KB as 1,000 bytes and 1 MB as 1,000,000 bytes, so a file made for a 100 KB limit is at most 100,000 bytes. That also fits limits that count 1 KB as 1,024 bytes.

PNG has no quality setting. To bring a PNG under a limit, PixMino first tries fewer colours where the change stays invisible, then suggests smaller dimensions. Converting to JPG or WebP is usually the bigger saving for photos.