Compress JPG to 100KB
Shrink your JPG to 100KB or less in seconds — right in your browser.
Drag & drop your image here, or
Reduces width and height so the image stays sharp at the target file size.
Where a 100KB limit comes from
100KB is the most forgiving of the common portal limits, and the one you meet on job application sites, university admission portals and document upload forms. It is large enough that a face stays clearly identifiable and scanned text stays properly readable, which is why forms that actually care about the content of the image tend to choose 100KB over 50KB. It is also a sensible ceiling for images you attach to an email or place inside a document.
What to expect at 100KB
At 100KB, as a rough guide:
| Starting file | Typical result |
|---|---|
| 12MP phone photo | around 850 × 640 px |
| Passport-style headshot | full 413 × 531 px with detail to spare |
| Scanned A4 document | around 1240 × 1750 px — close to 150 DPI, comfortably readable |
At 100KB most photographs survive with no visible loss at normal screen size. Zoom to 200% and you will start to see softening in fine detail such as hair and foliage.
How it works
- Select your file using the box above — it stays on your device.
- We compress it in your browser, adjusting quality and dimensions until it fits under 100KB.
- Download the result — your original file never leaves your device.
What to do next
- Compressing for a web page rather than a form? There is a version tuned for page-speed targets. Compress Image for Website →
- Need a smaller file because the portal rejected this one? Compress JPG to 50KB →
Frequently asked questions
Why is my file 96KB and not exactly 100KB?
The tool treats 100KB as a ceiling, not an exact figure. JPEG quality moves in steps, so it picks the highest quality that still lands under the limit — usually somewhere between 90KB and 100KB.
Can I keep the original dimensions at 100KB?
Often yes. Turn on 'Keep original size' and the tool holds your width and height and lowers quality instead. For a large phone photo that means a visible drop in sharpness; for an image that was already modest in size it may look identical.
My portal asks for 100KB and 300 DPI. How do those relate?
They do not affect each other. DPI is a print instruction stored in the file header; it changes nothing about file size or how the image looks on screen. Meeting the KB limit is what determines whether the upload is accepted.
Is 100KB enough for a scanned certificate or mark sheet?
For a single A4 page, yes — body text remains readable. If the document has small print, footnotes or handwritten annotations, 150KB or 200KB will hold up better under zoom.
Does 100KB work for website images?
It is on the small side but fine for thumbnails and inline images. For full-width hero images, around 200KB gives noticeably better results.