Reduce Picture Size
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Compress Image Online — Free & On-Device

Drop in one photo or a whole batch below and Reduce Picture Size compresses every one of them right in this browser tab — nothing is ever uploaded to a server. Choose a quality level or dial in an exact target file size in KB, and the tool works out the rest.

Works with JPEG, PNG, and WebP, and every photo can also be resized, cropped, watermarked, or converted to a different format in the same pass. When you're done, download each photo individually or grab the whole batch as one ZIP.

Drop photos here, or click to choose

Batch-compress, resize, crop, rotate, watermark, and convert formats — right in this tab.

JPEG · PNG · WebP · AVIF (where supported) — your photos never leave this browser tab

No photos yet

Nothing here yet — add photos above to get started.

Only helps if your background is already one plain color (e.g. a wall) — this is color-distance math, not real subject cutout, so it won't do anything useful against busy or textured backgrounds.

Upload a photo

You'll crop it to the exact aspect ratio next.

Printable sheet

How to compress an image online

  1. Tap the box above (or drag and drop) to add one photo or a whole batch — JPEG, PNG, or WebP.
  2. Pick a compression mode: Quality for a 1–100 slider, or Max file size to hit an exact KB target.
  3. Tap Process all to compress every photo in the batch at once.
  4. Download each photo individually, or grab the whole batch as one ZIP from the settings panel.

Frequently asked questions

Will compressing reduce the quality of my photo?

Some — compression trades file size against visual quality. Quality mode lets you set that trade-off directly; higher numbers keep more detail but produce larger files. For most photos, a quality setting between 65 and 85 looks close to the original at a fraction of the size.

What's the difference between Quality mode and Max file size mode?

Quality mode encodes once at the level you choose. Max file size mode searches for the highest quality that still fits under your KB target — useful when a form or upload limit gives you a hard size cap.

Does this tool upload my photos anywhere?

No. Compression runs entirely in your browser using the Canvas API — your photos never leave your device. See the Privacy Policy for details.

Which formats can I compress?

JPEG, PNG, and WebP, plus reading HEIC/AVIF where your browser supports decoding them. You can convert to a different output format as part of the same pass.

Can I compress more than one photo at once?

Yes — add as many as you like and tap Process all. Each photo keeps its own result, downloadable individually or as one ZIP.