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Compress image to 500KB

500KB leaves room for a detailed photo while still keeping email and uploads manageable. Use it when 100KB or 200KB would make the image too soft.

Files never leave your device Free · No signup · No watermark JPG · PNG · WebP

Compress to a target size

JPG, PNG, or WebP · processed on your device

Drop images hereor click to browse. Batch supported.JPG · PNG · WebPChoose imagesUp to 50 files · 50MB each · nothing is uploaded
Output format

How to compress an image

  1. Add your image Drop a file, choose one from your device, or paste from the clipboard.
  2. Set a target size Use the preset or enter your own limit in kilobytes.
  3. Download the result The tool returns the best quality that fits under the limit.

A higher-quality target

A 500KB cap is common for email attachments, newsletter images, marketplace listings, and client previews. It is generous enough for a large photo, but still small enough to avoid slow uploads and full inboxes.

Because there is more room in the budget, SizeUnder can usually keep the original dimensions and reduce only the encoder quality. That means less visible softness and fewer resized files than a 100KB target.

Good use cases for 500KB

  • Sending a few high-quality photos by email without a cloud link.
  • Uploading product images to a marketplace with a per-file cap.
  • Adding a large photo to a newsletter or blog draft.
  • Sharing a preview with a client while keeping the original separately.

Do not over-compress the original

Compression is lossy for JPG and WebP. Keep the original file and compress a copy for the destination. If you need to edit the image later, start from the original rather than re-compressing the already compressed result.

For web use, WebP at 500KB is often more detailed than JPG at the same size. For maximum compatibility with older software, JPG remains the safer choice.

Frequently asked questions

Is 500KB small enough for email?

Usually, yes. Most email providers allow attachments up to 20–25MB total, but 500KB per image keeps messages fast and avoids inbox clutter.

Will the image dimensions change?

Often not. At 500KB, the tool can usually reach the target by adjusting quality alone. It resizes only if the image is still too large at the lowest acceptable quality.

Should I choose JPG or WebP?

Choose WebP for modern websites and smaller files. Choose JPG when the destination is an older app, a form, or a workflow that does not accept WebP.

Can I compress a batch to 500KB each?

Yes. The target applies per image, and the results can be downloaded individually or as one ZIP.

Last updated: November 12, 2026