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PixMino

Compress an image to 100 KB

100 KB is one of the most common upload limits for photos and documents. PixMino gets your image under it while keeping as much detail as possible.

  • No signup
  • Your images stay on your device
  • Free, no watermark
Mode

Drop an image here

or

Choosing several images switches to batch mode.

  • JPG
  • PNG
  • WebP
  • AVIF
  • HEIC
Up to 50 MB

How to compress an image to 100 KB

  1. 1

    Add the image

    JPG, PNG, WebP, AVIF and HEIC all work.

  2. 2

    Leave 100 KB selected

    Add exact dimensions if the site asks for them.

  3. 3

    Optimize and download

    The result shows the exact size, for example 98.4 KB.

What 100 KB allows

A typical photo saved as JPG reaches 100 KB at roughly 1,000 to 1,500 pixels on its longest side. That's enough for a clear photo on a phone screen or a document page that remains readable.

From a modern phone camera, which produces 12 to 48 megapixel photos, PixMino will usually need to reduce the dimensions as well. It recommends the largest size that fits, so you don't lose more detail than necessary.

Common uses

  • Job applications and online forms that limit attachments to 100 KB.
  • Scanned documents, certificates and ID copies in JPG.
  • Product photos for listings with strict upload limits.
  • Images for blogs and newsletters that should load quickly.

Scanned documents

For scans, keep the text readable rather than the photo sharp: 1,200 to 1,600 pixels wide is often enough for an A4 page. Use the comparison slider to check small print before you download.

Supported formats

PixMino opens five formats and saves four. HEIC photos from iPhones are saved as JPG or PNG.

JPG

Best for
Photos and images with soft gradients.
Transparency
Not supported.
Compression
Lossy, with adjustable quality.

PNG

Best for
Screenshots, logos and graphics with sharp edges or text.
Transparency
Supported.
Compression
Lossless. Can use fewer colours where the change is invisible.

WebP

Best for
Websites that need small files.
Transparency
Supported.
Compression
Lossy, usually smaller than JPG at similar quality.

AVIF

Best for
The smallest photo files for modern websites.
Transparency
Supported.
Compression
Lossy, often smaller than WebP. Slower to create.

HEIC

Best for
Photos taken on iPhone and iPad. Opened by PixMino, saved as JPG or PNG.
Transparency
Not used by camera photos.
Compression
Lossy and very efficient, but poorly supported outside Apple devices.

AVIF and HEIC use codecs downloaded the first time you need them; after that they work offline. Animated images are converted as a single frame.

Questions

Is 100 KB counted as 100,000 or 102,400 bytes?

PixMino uses 100,000 bytes. A file under that is also under 102,400 bytes, so it fits either way.

My PDF scan needs to be 100 KB. Can PixMino help?

PixMino works with images, not PDFs. If you have the scan as JPG or PNG, it can bring it under 100 KB.

What if it still won't fit?

Apply the suggested dimensions, allow stronger compression, or try WebP if the site accepts it.