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Compress a JPEG to 100 KB

This page takes a file that is already a JPEG and produces a smaller JPEG under 100,000 bytes. Staying in the same format matters more than it sounds: a form that names JPG usually checks, and converting to something else is how an upload gets rejected for a reason the error message never explains.

JPG · up to 30 at once

Nothing uploadedNo sign-upNo watermarkHow that works

How to compress a JPEG to 100 KB

  1. Tap Choose a JPEG and pick the .jpg or .jpeg file.
  2. The target is already 100 KB. Tap Compress to 100 KB.
  3. Check the size and the preview, then save.

Every JPEG save costs a little, and it never comes back

JPEG is lossy, which means saving one discards detail permanently. Compressing a JPEG that was already compressed does it a second time, on top of the damage from the first — this is generation loss, and it is why a picture that has been forwarded through five chat apps looks the way it does.

One extra pass to meet an upload limit is not something you will see. What you should avoid is doing it repeatedly: compress from the largest original you still have rather than from the version you compressed yesterday, and keep the original in case a different form wants a different number.

Why this page will not hand you a PNG

Converting a photograph to PNG makes it larger, often several times over, because PNG stores every pixel exactly. On the generic compress page the tool is free to change format if that is the only way to hit a target. Here it is not: you came for a JPEG and the output is a JPEG, even in the rare case where that costs a little quality.

Questions

Is JPG different from JPEG?
No. They are the same format with two spellings of the extension, left over from when filenames could only have three letters after the dot. Either is accepted here.
Will compressing twice halve the quality twice?
Not quite — the second pass mostly re-encodes damage that is already there. It is still worth going back to the original when you have it, because that version has been through the process once instead of twice.
My JPEG will not go under 100 KB. Why?
Too much fine detail for the pixel count — a crowd, foliage, or a page of small print. The tool reduces the pixel size to help, and stops before the picture becomes unusable, telling you where it stopped.

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