Compress Image to 20KB Online
Shrink signatures and small photos to 20 KB or less for online applications. Free, instant and private.
Drop images here or browseJPG, PNG, WebP, HEIC · up to 20 at once · output JPG
🔒 Processed in your browser — your files are never uploaded. Free, no sign-up, no watermark.
How to compress an image to 20KB
Quick answer: add the signature or photo above, keep the target at 20 KB and click Compress. The tool lowers quality only as much as needed and reduces the dimensions if necessary, so the JPG you download is 20 KB or smaller.
- Upload your signature or photo.
- Keep the 20 KB target (or set 10 KB, 15 KB… whatever your form says).
- Compress and download.
Why 20 KB?
Many government job portals, public service commissions, banks and exam boards ask for a signature between 10 and 20 KB and sometimes a photo between 20 and 50 KB. Uploading a larger file is rejected, so you need to shrink the image first.
How to get a clear signature at 20 KB
- Sign with a black or dark blue pen on plain white paper.
- Photograph it in daylight without shadows, holding the phone straight above.
- Crop tightly around the signature with the crop tool — extra white space wastes bytes.
- If the form gives pixel dimensions (for example 140 × 60 px), resize first with the image resizer.
Typical requirements
| Item | Common size limit |
|---|---|
| Signature | 10–20 KB |
| Applicant photo | 20–50 KB (see 50 KB tool) |
| Documents | 100–300 KB (see 100 KB tool) |
Always follow the exact size and dimension rules in your application notice.
Frequently asked questions
How do I reduce a signature to 20KB?
Upload the signature image, keep the target at 20 KB and click Compress. Download the JPG — it will be 20 KB or less.
Can I compress to 10KB or 15KB?
Yes. Type 10 or 15 in the target size box before compressing.
Will the signature still be readable?
Yes. A cropped signature on white paper stays clear even at 10–20 KB.
Is my signature uploaded anywhere?
No. The compression runs in your browser, so your signature never leaves your device.