Compress an Image to 100 KB
Bring a photo under 100 KB at the highest quality that fits, for the many sites, editors and forums that cap image uploads at that size.
- On-device
- No sign-up
- Batch
- Free, no watermark
Drop images on the plate
or paste with Ctrl/⌘ V
Processed on this device
How it works
- 01Drop, choose or paste the photos that must be under 100 KB.
- 02Keep the 100 KB target and choose JPG or WebP output.
- 03Select Process and review each file’s final size and dimensions.
- 04Download the files individually or use Download all for a ZIP.
Why use this tool
Fits the 100 KB cap
The result lands at or below 100 KB, so the upload isn’t rejected for being too large.
Best quality that fits
Pixellin searches for the highest quality under 100 KB rather than applying one fixed low setting to every photo.
Whole listings at once
Process a full set of listing or post images in one batch and download them together as a ZIP.
Supported formats
Use cases
Marketplace listings
Some classified and marketplace sites limit the size of each listing photo. Bring a set of item photos under 100 KB so every one uploads on the first try.
Forum avatars
Forums and community boards often cap avatars around 100 KB. Shrink a profile picture so it’s accepted and still looks clear at small sizes.
CMS and email limits
Older content systems and newsletter tools may restrict inline image sizes. Fit photos under 100 KB so posts and emails stay light.
Technical details
100 KB is a common ceiling for listing photos, avatars and images inserted into older CMS editors or newsletters. At that size, a JPG can hold a clear on-screen photo at moderate dimensions. A full-resolution phone photo carries far more detail than 100 KB can store, so expect Pixellin to lower quality first and, if that isn’t enough, reduce the pixel dimensions step by step until the file fits.
The final size and dimensions are reported for every file, so you can see whether resizing happened. If a site also requires specific dimensions, resizing to those first gives you more control over the result. When the destination accepts WebP, choosing it as the output often keeps a little more detail within the same 100 KB. Need a different limit? Use Compress to exact size.
Your files stay with you
This tool runs entirely inside your browser using Web Workers and WebAssembly. Your images are never uploaded, never stored on a server and never used to train AI. Close the tab and they’re gone. Learn more
Frequently asked questions
How do I reduce a photo to under 100 KB?
Drop the photo here and select Process. The 100 KB target is already set, so Pixellin searches for the highest quality that fits and reduces dimensions only if needed. Then download the JPG and upload it wherever you need it.
Will a 100 KB photo look blurry?
Usually not on screen, as long as it isn’t displayed very large. Quality is kept as high as the limit allows. Very large originals may be scaled down to fit, which keeps them sharp at normal viewing sizes but limits zooming in.
Can I get several photos under 100 KB at once?
Yes. Add up to 200 photos and each one is compressed separately to fit under 100 KB. The list shows every final size, and Download all saves them together as a ZIP, which is handy for a full listing.
Is 100 KB the same as 0.1 MB?
In decimal units, yes: 100 KB is 100,000 bytes, or 0.1 MB. Some systems count 1 KB as 1,024 bytes, which makes their 100 KB slightly larger. Staying a little under a stated limit avoids surprises either way.
Can I start from a PNG or HEIC and still get 100 KB?
Yes. PNG, HEIC, WebP, AVIF, BMP and TIFF are accepted as input. The output is JPG by default, or WebP, because those formats reach small sizes with photos. iPhone HEIC photos are decoded right in your browser.
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