UsefulBasis
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Compress image to 20 KB

Shrink a photo or signature image to 20 KB or less, as a JPG. 'Shrink dimensions further if the target is missed' is already on, so the tool keeps going until the file fits.

Local processingImage contents, file names, and conversion settings never leave your browser.
JPG, PNG, still WebP, iPhone HEIC · up to 30 files · 25MB per file · 40MP per image

No files selected.

Drag & drop images here to add them, or paste from the clipboard (Ctrl/Cmd+V). Folders cannot be added — drop the image files inside instead.
Off by default. When on, the tool reduces width/height step by step after the quality search bottoms out, and shows the final dimensions.
PNG can hardly hit a target size via quality value — converting to JPG or WebP works better. Transparent images converted to JPG get a white background.

Why 20 KB almost always means fewer pixels

A phone photo holds millions of pixels, and every pixel costs bytes. Lowering the JPG quality setting alone usually stalls well above 20 KB — at very low quality the picture turns blocky long before the file is small enough. The reliable way to reach 20 KB is to reduce the pixel dimensions as well, which is why this page enables extra shrinking by default: quality is lowered first, then the width and height step down until the result fits. The final dimensions are shown next to each result, so you can check them against your portal's minimum size, if it has one.

20 KB is a realistic target for small images: a scanned signature, a thumbnail, or a small ID-style photo. A signature on plain white paper compresses especially well because most of the frame is a single flat colour. If your original is a detailed photo, expect it to end up a few hundred pixels wide — fine for an upload slot, but keep the original file for anything you may print later.

Some portals also set a minimum file size (for example, "10 KB or larger"). If a result comes out below the minimum your portal asks for, start from a larger or less compressed original rather than re-saving the small result, which cannot add detail back.

Popular sizes & photo specs

What it does

Shrink up to 30 JPG, PNG, or WebP images at once, right in your browser. Set quality 40–95, target KB, and max width/height yourself — file contents and names never leave your device, and no signup is needed.

What is supported

Supported

JPG, PNG, and still WebP compression & resizing, plus iPhone HEIC/HEIF photos (decoded in your browser and converted to JPG/WebP/PNG), with individual and ZIP download.

Not supported

GIF, animated WebP, server storage, and accounts.

Note

Processing large images may fail if the browser runs out of memory.

Related tools

How to shrink multiple photos at once