Reduce Image Size to KB — Free, No Upload
Set a target in KB — 50, 100, 200, or any value. Runs entirely in your browser.
When you need an exact file size
Most image tools let you pick a quality level, but that doesn't guarantee a specific file size. This tool works differently — you enter the KB limit you need, and it compresses until it gets there. Useful when a form says "file must be under 100 KB" and guessing quality percentages wastes time.
Common use cases
Government portals
Passport, Aadhaar, voter ID, PAN, and most government job portals require photos under 50 KB and signatures under 20 KB. The form rejects anything larger with no guidance on how to fix it.
Job applications and HR portals
Naukri, Shine, and many corporate application systems have a profile photo limit of 100–200 KB. Uploading a phone camera photo (3–5 MB) directly will fail.
Email attachments
Sending multiple product photos or scanned documents by email is faster when each image is under 200 KB. Reduces email size from MBs to KBs without visible quality loss.
Online forms with upload limits
University admissions, scholarship portals, and bank KYC forms commonly cap document scans at 100–500 KB per file.
How it works
The tool uses a binary search on JPEG quality — it tries quality 85, checks the resulting file size, then adjusts up or down until it lands within a few KB of your target. All done in your browser using the Canvas API and Blob compression, with no external requests at any point.
Frequently asked questions
How do I reduce an image to 100 KB?
Upload your image, type 100 in the target KB field, and click compress. The tool adjusts quality automatically until the output is at or under 100 KB.
Can I compress an image to exactly 20 KB for a signature upload?
Yes — set the target to 20 and upload your signature image. Very small targets may affect sharpness, but the output will meet the size requirement.
What formats are supported?
Input: JPEG, PNG, WebP, BMP. Output is JPEG, which gives the best compression ratios for photographs and scanned documents.
Will quality be affected?
At targets above 50 KB, most photos compress with no visible quality difference. Below 20 KB, some softening is unavoidable — this is a physical limit of JPEG compression.
Is it free? Does anything get uploaded?
It's completely free. Nothing is uploaded — the image is processed entirely in your browser memory. You can disconnect from the internet after the page loads and it will still work.