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Resize image to 100KB online

Scanned documents, ID proofs, and college submissions frequently ask for files under 100KB. Drop your image here to compress it to just under that limit, with the whole process happening on your own device.

  • No upload — files stay on your device
  • Works offline once loaded
  • Free forever, no signup, no watermark
Drop a photo here, or tap to choose JPG, PNG, WebP or HEIC from your phone — nothing is uploaded
Target file size
Custom target (KB)
Width (px, optional)
Height (px, optional)

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Finding the best quality that fits {{ targetLabel }}…
Result preview Resized photo preview
  • Original {{ sourceSizeLabel }}
  • Now {{ resultSizeLabel }}
  • Saved {{ savedPercent }}%
  • Pixels {{ resultWidth }}×{{ resultHeight }}

Within your {{ targetLabel }} target.

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How to use this tool

  1. Add your photo

    Drop the image onto the box, or tap it to pick a file — on a phone you can shoot a fresh photo straight from the camera.

  2. Choose the target size

    Pick one of the KB presets or type your own number, and add a pixel width and height if the form demands specific dimensions.

  3. Check and download

    The preview shows the compressed result and its exact size. If it looks right, download the JPEG and upload it to your form.

Questions people ask

How do I reduce an image below 100KB?

Choose the 100KB preset and the tool compresses until the file fits, shrinking the pixel dimensions only if compression alone cannot get there. The final size is shown before you download.

Is my photo uploaded to a server?

No. The resizing happens inside your own browser using the Canvas API, and this site has no upload endpoint at all. You can switch off your internet connection after the page loads and the tool still works.

Will resizing to a small KB size ruin my photo?

Quality does drop as the file gets smaller, but the tool searches for the highest JPEG quality that still fits your target instead of guessing. The preview shows exactly what you are about to download, so you can judge it before saving.

Can I set the pixel width and height as well as the KB size?

Yes. Enter a width and height and the photo is resized to those dimensions first, then compressed to your KB target. Leave them blank to keep the original proportions.

Does it work on a phone?

Yes. Tapping the drop zone opens your camera or gallery, and the download works the same way it does on a desktop. Most forms are filled on a phone, so the tool is built for that first.

Related tools

Free because it costs us nothing to run: your browser does the work, not our servers. Made by Dynamb Technologies — we build software for businesses.