How to compress a JPG to 50KB
- Select Choose files, or drop a JPG photo on the box.
- The tool aims for under 50KB, which is 51,200 bytes here. It tests quality levels from 95 down to 40 percent and keeps the sharpest result that fits.
- If 40 percent is still too big, it shrinks the width and height by 15 percent at a time until the file fits.
- Select Download. The result ends in
-compressed, so your original is untouched.
Where a 50KB limit comes from
A 50KB JPG limit is a frequent cap for profile photos, ID-style pictures and small attachments on many online application forms. It is enough for a clear face-sized image.
What 50KB means in pixels
50KB is 51,200 bytes, or 409,600 bits. Divide that by the number of pixels and you get the bits each pixel can use. Photos look fine at about 1.5 bits per pixel or more, and the table shows how common sizes fare at 50KB.
| Picture size | Pixels | Bits per pixel | At 50KB |
|---|---|---|---|
| 640×480 | 307,200 | 1.33 | fine for photos |
| 1024×768 | 786,432 | 0.52 | soft, expect some shrinking |
| 1600×1200 | 1,920,000 | 0.21 | too tight, the tool shrinks the picture |
| 4000×3000 | 12,000,000 | 0.03 | too tight, the tool shrinks the picture |
At 1.5 bits per pixel, 50KB holds a picture of about 603×452 pixels in a 4:3 shape (272,556 pixels). At 50KB a JPG around 500 to 600 pixels across keeps decent clarity. The tool binary-searches quality between 40 and 95 percent and keeps the best result that fits. Only if quality 40 is still too large does it reduce the pixel size.
About the output format
This page takes JPG input and always returns a JPG. It will not switch format on you, which matters when a portal accepts JPG only. The general 50KB page accepts PNG and WebP and may return WebP.
Tips
- Cropping out empty space is the cheapest way to save bytes, before any quality is lost.
- A portrait with a white or light grey background is the easiest case.
- Prefer a safer margin? Compress to 20KB only if the form allows it, never above its limit.
- See also: compress JPG to 20KB, compress JPG to 100KB, compress to 50KB, image resizer.
Your images stay on your device. Nothing is uploaded, and there is no sign-up.