Compress Image to 50 KB
Squeeze a photo under 50 KB while keeping as much quality as the limit allows, or fix the pixel size and change only the compression.
More options: pixel size, DPI, how KB is counted
Leave width and height empty to let the tool choose. Fill in one of them to keep the proportions; fill in both for an exact size.
Two ways to reach 50 KB
A JPG file’s size is set by its pixel count and its compression level, so there are two levers:
| Lever | What changes | Best when |
|---|---|---|
| Compression (JPG quality) | Fine detail and smooth gradients are stored more coarsely; the width and height stay the same. | The form fixes the pixel size, or the photo is only a little over the limit. |
| Resizing (pixel dimensions) | The picture has fewer pixels; each one keeps good quality. | The photo is large (for example straight from a phone camera) and the form doesn’t specify dimensions. |
By default the tool uses compression first and resizes only when the JPG quality would otherwise drop below 70. Then it goes back and raises the quality as far as the 50 KB limit allows, so the final file sits just under the limit rather than well below it.
How much picture does 50 KB buy?
| Pixel size | Pixels | Bits per pixel at 50,000 bytes |
|---|---|---|
| 413 × 531 | 219,303 | 1.82 |
| 600 × 800 | 480,000 | 0.83 |
| 1080 × 1080 | 1,166,400 | 0.34 |
| 1600 × 1200 | 1,920,000 | 0.21 |
| 4032 × 3024 | 12,192,768 | 0.03 |
A 12-megapixel photo (the last row) would have to make do with about three hundredths of a bit per pixel, which no compression setting can do cleanly. That’s the case where resizing wins. A 600 × 800 portrait, by contrast, gets close to one bit per pixel, which is workable for most pictures.
Compress to 50 KB without changing the size
- Open More options and type the width and height you need, for example 600 × 800.
- Choose Crop to fill if your photo has a different shape, or Fit with white borders to keep all of it.
- Add your image. Only the quality is adjusted, and the result’s pixel size is shown next to its byte count.
Need the other direction? If your file is below a required minimum, use increase image size in KB. For smaller limits see resize image to 20 KB; for scans, 100 KB.
Frequently asked questions
What's the difference between compressing and resizing to 50 KB?
Compressing keeps the width and height and stores the pixels more efficiently (a lower JPG quality). Resizing reduces the width and height. This tool compresses first and resizes only if compression alone can't reach 50 KB at a reasonable quality. To forbid resizing, enter your required width and height under More options.
How do I compress a JPG to 50 KB without changing its dimensions?
Open More options and type the image's current width and height (or the size your form asks for). With the pixel size fixed, the tool changes only the JPG quality. If even the lowest quality is over 50 KB at that size, it tells you instead of producing an oversized file.
Can I compress an image to between 20 KB and 50 KB?
Yes: use the 20–50 KB preset. The tool aims just below 50 KB, which keeps the most quality, and checks that the result is above 20 KB.
Does compressing to 50 KB reduce quality?
Some, because JPG compression discards detail the eye is less likely to notice. Near the limit the difference is small for most photos; it becomes visible as blockiness only when a very large or very detailed picture has to fit. The before and after previews let you check.
What JPG quality will I get?
It depends on your picture. The tool reports the quality it used (on a 1–100 scale) with each result. It doesn't go below 70 while it can still shrink the dimensions instead, unless you've fixed the pixel size.