How to Compress an Image to 20KB, 50KB or 100KB for Online Forms

UPSC, SSC, passport, university and bank portals all demand photos under a strict size — often "20 KB to 50 KB" or "max 100 KB". Random compression either misses the target or destroys the photo. This sequence hits the number cleanly.

Step 1: Resize before you compress

Most rejected photos are simply too large in pixels. A form that wants 100 KB rarely needs more than 600×600 pixels. Use the image resizer to scale your photo down to the dimensions the form specifies (or roughly 400–600px wide for a passport-style photo). Resizing alone often gets you 80% of the way to the target.

Step 2: Convert to JPG

JPG compresses photographs far smaller than PNG. If your image is a PNG (screenshots and many phone exports are), convert it with the PNG to JPG converter first — this step alone can cut size by half or more.

Step 3: Compress to the target

Now run the image compressor and lower the quality until you land in range. For a 20 KB target, expect quality around 40–55%; for 100 KB you can stay near 70% and keep it sharp. Compress, check the size, nudge the slider, repeat — it takes seconds.

For passport and signature photos

If the form also dictates an aspect ratio (e.g. 3.5×4.5 cm), crop first with the image cropper so you are not spending precious kilobytes on background you will discard. Signatures usually need to be even smaller — resize to ~140px tall before compressing.

Then bundle it if needed

When the same form wants everything as one PDF afterward, send your compressed images straight into the JPG to PDF converter. Every tool here runs in your browser, so your photo and signature are never uploaded.