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PDFImageTools

Compress an image

Make photos smaller without making them look bad. Drag the quality slider and watch the result update, or set a target file size and let the tool find the setting for you.

Your file is processed on your device and is never uploaded.

What this tool does

  • Side-by-side before and after, with a drag-to-compare view
  • Aim at an exact file size in KB
  • Compress a whole batch in one pass

How to use compress image

  1. Add your images

    Drop in JPG, PNG or WebP files — one or many.

  2. Choose quality or a target size

    Drag the slider for manual control, or switch to target mode and type a size in KB.

  3. Compare and download

    Check the preview against the original, then save.

Frequently asked questions

How much smaller will my image get?

Photographs typically drop by 60–85% at the default quality with no visible difference. Screenshots and graphics with flat colour compress less as JPG but do very well as WebP or PNG. The exact saving is shown for every file before you download.

Does compressing reduce image quality?

JPG and WebP are lossy, so some information is discarded — that is what makes the file smaller. At the default setting the loss is essentially invisible. The compare view lets you check at full size before committing, and you can always raise the quality and try again.

Can I compress to an exact file size?

Yes. Switch to target mode and enter a size in KB. The tool searches for the highest quality that fits, and will also reduce the dimensions if quality alone cannot reach your target.

Is PNG compression lossless here?

Re-encoding a PNG as PNG is lossless but usually saves little, because PNG is already compressed. For a genuinely large saving on a PNG photograph, convert it to JPG or WebP — the tool lets you change the output format.

Are my photos uploaded to a server?

No. Compression uses your browser’s own image encoder, running in a background thread on your device. Your photos never leave it.