Compress image to 100 KB
Under-100 KB is the most common upload requirement on the web — job application portals, government e-services, school systems, and CMS platforms all use it. This tool hits the limit automatically: drop your image, get a file guaranteed under 100 KB.
Drop images here or click to browse
JPG · PNG · WebP · GIF · BMP · AVIF — processed locally, never uploaded
≤ 100 KB
Why 100 KB is the web's favourite limit
100 KB sits right at the point where a photo still looks good on screen but stays cheap to store and fast to serve. For a platform handling millions of uploads, that balance keeps both bandwidth bills and page-load times under control — so it has become the default cap across a huge range of sites.
You'll be asked for an image under 100 KB in situations like these:
- Job application and recruitment portals.
- Government and tax e-services.
- University and school admission systems.
- CMS and website uploads where editors want fast pages.
Getting the best quality under 100 KB
100 KB is generous enough that most photos come through looking great, especially in WebP. If a site only accepts JPEG, switch the output format — you'll use a little more of your budget on the same image, but it will still fit comfortably in most cases.
For the sharpest result, resize to the dimensions you actually need first (1000–1200 px wide covers almost any web use) rather than compressing a full-resolution phone photo. Smaller starting dimensions mean the compressor can spend its 100 KB budget on quality instead of raw pixel count.
Other target sizes
Frequently asked questions
Why do so many websites require images under 100 KB?
It keeps their storage and bandwidth costs predictable and their pages fast. 100 KB is roughly the sweet spot where a photo still looks good on screen but loads quickly on any connection.
Is my image uploaded to a server?
No. Compression happens entirely in your browser using the Canvas API — your image never leaves your device, which is also why it's instant.
What if my image can't reach 100 KB?
The tool first lowers the compression quality, and if that's not enough it gradually reduces the dimensions until the file fits under 100 KB. Extremely detailed images may lose visible quality at very small targets — the preview shows you exactly what you'll get.
Is this free? Is there a watermark?
Completely free, no watermark, no sign-up, no file limit. The site is supported by ads.