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PhotoSize Lab / Compress a photo to an exact file size

Compress a photo to an exact file size

Portals that only accept 20 KB, 50 KB or 200 KB: type the target and the tool binary-searches JPEG quality, reducing resolution only when it has to — and telling you which happened.

Three steps

1

Enter 20 in "Target size" and pick the specification your portal asks for.

2

Upload the photo; the estimate updates as you adjust the crop.

3

Download and read the note: on target, or resolution reduced.

Sizes this applies to

Many portals also set a minimum size — check the lower bound after compressing, or the file may be rejected as corrupt.

Questions

Will 20 KB look blurry?

At 295×413 px a 20 KB file is still readable. Below that quality drops quickly and the tool warns you.

Why can it not reach my target?

JPEG has a floor. Clean backgrounds compress well, noisy photos do not — the tool then reduces resolution and says so.

Does it support PNG?

Yes, but PNG barely compresses and most portals only accept JPG.

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