ResizeWizard
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Format Compression

Compress PNG to 100 KB

Compress a PNG image to 100 KB online with a private browser-based compressor.

≤ 100 KB targetPNG output
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Resize an image

100% private

Upload an image to start. Processing happens in your browser.

Quick answer

Compress PNG to 100 KB directly in your browser. Upload an image, use the prefilled settings, process it locally, and download the result.

How it works

PNG files can balloon in size because PNG is lossless and stores every pixel exactly, which is a problem when a form caps uploads at 100 KB. This page is preset to take a PNG and bring it under 100 KB, converting to a more compact format when that produces a smaller file, all inside your browser.

  1. Upload your PNG image.
  2. Keep the output target at 100 KB.
  3. Process the image and review the estimated file size.
  4. Download the compressed file.

Tips for the best result

  • PNG rarely hits a tight 100 KB target on its own — for photographs, exporting as JPG or WebP will get you there with far less quality loss.
  • Screenshots and flat graphics with sharp edges stay cleaner as PNG; photos do better as JPG or WebP.
  • Resize the pixel dimensions down before compressing if the image is much larger than it needs to be.

Why this workflow works

Practical benefits

No signup, watermark, or server upload is required.

The relevant dimensions or file-size target are prefilled.

JPG, PNG, and WebP output options cover common workflows.

Common mistakes to avoid

  • Do not edit the only copy of your image. Keep the original before using this page.
  • Do not judge the result by file size alone. Open the downloaded image and check important details.
  • Do not force 100 KB using compression only if the image becomes blurry. Reduce dimensions first when the source is very large.

Example workflows

  • Use this target-size workflow for application portals, support tickets, CMS uploads, or email attachments with a strict file-size cap.
  • If the first result is still too large, reduce the width and height before lowering quality further.
  • If the destination accepts WebP, test it against JPG because it may create a smaller photo file.

Common questions

Frequently asked questions

How do I use compress png to 100 kb?

Upload your PNG image. Keep the output target at 100 KB. Process the image and review the estimated file size. Download the compressed file.

Does ResizeWizard upload my image?

No. Supported images are decoded and processed locally in your browser.

Which output format should I choose?

Use JPG for photographs and broad compatibility, PNG for transparency, or WebP for efficient modern web delivery.

Keep going

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