Shrink a JPG to a size limit you choose, not a vague quality slider you have to guess at.
Enter the maximum your form, email attachment or upload field allows. The compressor searches for the highest JPEG quality that still comes in underneath, so you give up as little detail as the limit allows.
When to compress and when to resize
If the image is physically larger than it needs to be — a 12-megapixel camera shot going into a 200-pixel-wide form field — resize it first. Removing pixels you do not need costs nothing visually. Compressing an oversized image instead throws away detail from the part you actually keep.
And if your file ends up below a minimum the form enforces, increase it back up rather than starting over.
Frequently asked questions
How do I compress a JPG to a specific size?
Type the maximum in kilobytes and download. The output lands at or just under that number rather than at some arbitrary quality percentage.
Does compressing a JPG twice make it worse?
Yes. Each pass discards detail permanently, and the losses stack. Always start from the original file, not from something you compressed earlier.
Is there a quality floor?
The tool will not drop below a usable quality setting. If your target is so small that quality alone cannot reach it, it reduces the pixel dimensions instead, which looks far better than extreme compression.