File sizes use decimal units: 1 KB = 1,000 bytes and 1 MB = 1,000 KB. Your image is processed on your device.
How to compress an image to 100 KB
- Choose the original image, not a copy from a chat app.
- Select Prepare. The 100 KB limit and JPG format are already set.
- Check the preview, especially text and faces.
- Download the JPG and upload it to the portal.
Preparing an image for a 100 KB upload
A 100 KB limit suits many job portals, college admission forms and online applications that accept scanned documents or photos. Compared with a 20 KB or 50 KB target, 100 KB leaves enough room for text on a scanned certificate, a signature with thin strokes or the fine hair and background of a photo to stay readable.
Use the original image rather than a version already shared through a messaging app, because those apps compress files and lower the starting quality. The tool then creates a JPG at or below 100,000 bytes, reducing quality first and dimensions only when the file is still too large.
Resize image to 100 KB in two clicks after you choose the file: select Prepare, then download the JPG. The 100 KB limit and JPG format are already set, so you do not need to change them.
Keeping text and detail readable
If your image is a document, make sure the page is flat, evenly lit and fills most of the frame. Crop out the desk and background first, so the compression spends its bytes on the content that matters. Small type blurs first, so check it in the preview at 100 percent zoom.
For a photo, frame the face closely, keep it in focus and check that the eyes and edges are clear. If the preview looks too soft, re-export the original at a higher quality before trying again, rather than compressing the same file repeatedly.
Privacy and a quick check
Your image is processed in your browser on a phone or computer. It is never uploaded to a server, stored or shared, and you do not need an account. The downloaded file has no watermark.
The final size is shown before you download. KB here equals 1,000 bytes, so the limit is 100,000 bytes. If a portal uses 1,024 bytes per KB, this file still fits, because it is under 100,000 bytes.
If a portal rejects your file, first confirm the size and format shown on the download, then check the form's notice for other rules such as pixel dimensions.
Frequently asked questions
How do I make an image under 100 KB?
Choose your image, select Prepare and download the JPG. The tool adjusts compression and, when needed, dimensions to stay at or under 100 KB.
How do I check the final file size?
The download shows the finished size in KB. The output is checked against the 100,000-byte limit, and a preview is shown before you save it.
Can I use this for a job portal or admission form?
Yes, if the portal asks for a file under 100 KB. This tool sets the file size only, so check the form for pixel dimensions and accepted file types.
Why can an image look less sharp at 100 KB?
A 100 KB limit can require stronger compression or smaller dimensions. Review faces, fine text and thin lines in the preview, and start again from the original if the result is not suitable.
Is my image uploaded during processing?
No. The image is processed in your browser on your device and is not uploaded to a server.
Does 100 KB mean 100,000 bytes?
This tool counts 1 KB as 1,000 bytes, so the output is at or under 100,000 bytes. If a portal counts 1,024 bytes per KB, the same file still fits.
Can I compress a photo to 100 KB for free?
Yes. The tool is free, needs no sign-up and sets the 100 KB limit and JPG format for you, so you only choose the photo and download the result.