Compress Image to
Exact KB Size

Compress Image to Exact KB — Free & Instant

ReduceSize.online lets you compress images and PDFs to a precise file size — whether that's 10KB, 20KB, 50KB, or 100KB — right inside your browser. Your files never leave your device, so there's no privacy risk and no waiting for uploads.

Government exam portals, job applications, and college admissions often reject files that exceed their size limits. Even 1KB over the cap means rejection. ReduceSize uses smart binary-search compression to hit your exact target, every time.

Why Exact KB Compression Matters

Most tools reduce size by percentage or to a rough estimate. ReduceSize adjusts both image quality and dimensions together until your file hits the exact number you enter. No guessing, no retrying, no frustration.

Who Uses This Tool

• Students filling SSC CGL, CHSL, UPSC, Railway, Police forms
• Professionals sending email attachments with size caps
• Anyone uploading passport photos or ID scans to government portals

How to Use

1. Select one or more images using the upload box above
2. Enter your target size (e.g. 50) and choose KB or MB
3. Click Compress & Download — done in seconds

Frequently Asked Questions

How to resize an image to 20KB?
Upload, type 20, select KB, click Compress. The tool handles the rest.

Does it work for SSC and UPSC forms?
Yes — it was built exactly for this use case.

Can I compress multiple images at once?
Yes, select as many as you want and all will be compressed together.

Will quality suffer?
Quality is maximised for the size you choose. At very small sizes (below 20KB) some quality loss is unavoidable.