Custom KB Compressor — Any Size from 5KB to 5MB
Enter any target file size — 5KB, 35KB, 47KB, 90KB, or any custom value — and compress your image to precisely that size. Useful when your exam portal specifies a non-standard limit that 20KB, 50KB, or 100KB presets don't cover. All processing is 100% browser-based; your image never leaves your device.
Frequently Asked Questions
What sizes can I target with the custom compressor?
Any value from 5KB to 5MB (5120KB). Enter the exact KB number your portal requires. Common non-standard targets include 30KB, 35KB, 40KB, 45KB, 75KB, 80KB, 90KB, 150KB, and 200KB.
How accurate is the custom compression?
The tool uses iterative binary-search compression — it tests JPEG quality levels until the output lands within a few KB of your target. For most images the result is within ±2KB of the target.
Which exam portals need a custom KB size?
Some state PSC and university portals specify unusual limits like 30KB, 40KB, or 80KB. Railway (RRB) and bank portals sometimes specify ranges (10–30KB). The custom compressor handles all of these.
What image formats are accepted?
JPEG, PNG, WebP, and HEIC (iPhone photos). PNG and WebP are converted to JPEG internally for maximum compatibility with government exam portals that require JPG.
Is there a file size limit for uploads?
You can upload images up to 21MB. The compressor will reduce the output to your specified target regardless of the original file size.