Compress image to 100 KB
Upload portals often limit photos and scanned documents, such as ID proofs and certificates, to 100 KB. Choose your image below: the target is already set to 100 KB. PocketSizePDF keeps the highest quality that fits, and keeps the full dimensions when it can.
This page uses PocketSizePDF’s Image Compressor, where you can also pick exam presets or set any size.
Processed on your device. Your files stay in this browser tab. Nothing is uploaded.
Drop a JPG, PNG or WebP file here
One JPG, PNG or WebP file, up to 15 MB
How it works
- 1
Choose a JPG, PNG or WebP image. It is opened in your browser, not uploaded.
- 2
Keep the target at 100 KB, or change it. Select Compress image.
- 3
Check the preview and the exact file size, then download your image of 100 KB or less.
When you need an image of 100 KB
100 KB is enough for a sharp photo or a single page of a scanned document at a size that is easy to read on screen. In our tests, a 12-megapixel phone photo stayed over 3,000 pixels wide at 100 KB, and an A4 page scanned at 100 DPI kept its full size.
Tips for a better result
- For a scanned document, check that small print is still readable in the preview before you download.
- If your document has several pages, keep it as a PDF instead: use Compress PDF to make the whole file smaller.
- Crop away scanner borders and empty margins first; the space saved goes to the text and pictures that matter.
Size limits differ between forms and change over time, so always check the official instructions for the form you are filling in.
Questions about compressing to 100 KB
Will my image be exactly 100 KB?
It will be no more than 100 KB (1,00,000 bytes), but not always exactly 100 KB. PocketSizePDF picks the highest quality that fits under the limit, so larger images usually come out just under it — in our tests, between about 95% and 100% of the target. An image that is already smaller than 100 KB stays smaller: files are never padded to reach a number.
Why does the result show a little less than 100 KB?
Two reasons. The result is the largest file that fits under 100 KB, so it is normally a little below it. Also, sizes on screen are shown in units of 1,024 bytes, while the 100 KB limit is counted as 1,00,000 bytes, so the file passes forms that use either definition of a kilobyte.
Will text in my scanned document stay readable at 100 KB?
Usually, for a single page. PocketSizePDF lowers image quality before it reduces dimensions, and reduces dimensions only as far as needed. Always check the preview: if small text looks soft, crop the page more tightly or split a multi-page document into separate images.
What if my image can’t be made 100 KB or smaller?
PocketSizePDF first lowers the quality, then reduces the dimensions step by step while keeping the image clear. If the image still can’t fit without becoming unreadable, you’ll see a message instead of a poor result. Cropping the image first usually solves it.
Is my image uploaded to a server?
No. The image is compressed inside your browser and never leaves your device. You can check the Privacy Policy for details.