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Compress Image to 15KB
Enter 15 and download a clear JPG that fits a 15KB upload limit.
Advanced (optional): exact pixels or minimum KB
Many forms ask for pixels as well as KB. Leave empty if yours does not. Examples are common sizes only – always use the size your form states.
✅ Done! Your images are ready
About the 15KB image
15KB is a common cap on signature and thumb-impression fields and on small ID-style photos. It leaves just enough room to keep text and ink strokes readable, which 10KB sometimes cannot.
How to compress an image to 15KB
- Select your image. JPG, PNG, WebP and iPhone HEIC all work, and you can pick several at once.
- Check the size. The box is already set to 15. Change the number if your form says something different.
- Press the green button and download a JPG under 15 KB, or one ZIP for many files.
Compress mode keeps the best quality that still fits under your limit.
Where you need a 15KB image
Signature uploads
Fits a clean scan of a signature written in dark ink on plain white paper.
Thumb impressions
Some recruitment and exam forms ask for a thumbprint image; 15KB keeps the ridge pattern visible at small size.
Small ID thumbnails
Staff directories, hostel and library systems often store ID photos at very small sizes.
Support tickets
A 15KB screenshot crop attaches instantly, even on a poor connection.
What to expect at 15KB
Most photos reach 15KB at around 250 to 350 pixels on the long side. Screenshots with flat colours compress further and may keep their original size.
15KB image FAQ
Is 15KB enough for a passport photo?
For an on-screen thumbnail yes, for printing no. Official photo rules differ, so read your form's instructions before choosing the size.
Should I resize the photo first?
If your form lists exact dimensions in pixels, resize first and compress second. Otherwise the tool reduces dimensions only when lowering quality alone cannot reach 15KB.
Does the tool change my image to JPG?
Yes. PNG, WebP and HEIC files become JPG, which keeps the size small and is accepted almost everywhere.
Is my photo uploaded when I compress it to 15 KB?
No. The 15 KB resizing runs inside your browser, so your picture never leaves your device. No signup, no watermark.
Other sizes and tools
Compress image to a smaller size
Increase image size to a larger size
Signature, passport photo, formats and more
Prefer a percentage instead of a KB size? Use the quality-based image compressor, or read our image guides.