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Reduce file size — images & PDFs

Shrink44 hits an exact KB or MB target using iterative binary-search compression. Perfect for KYC forms, email limits and upload portals.

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KB/MB
Targets
90%
Max cut
100%
Private
$0
Free

What is Reduce file size — images & PDFs?

TL;DR: Shrink44 reduces file size by iteratively binary-searching the optimal quality / DPI to hit your specified KB or MB target.

Most online compressors give you a slider and hope for the best. Shrink44's file size reducer works the other way around: tell it your target size in KB or MB, and it iteratively binary-searches the optimal encoding to hit it.

This is invaluable for visa applications, government KYC forms, upload portals with strict caps (e.g. 200 KB photo, 1 MB document), and email attachment limits.

How it works

Step-by-step

Compress your file in under a minute — 100% in your browser.

1

Pick the right tool

Compress, PDF Compress, or Resize — based on your file type.

2

Drop your file

Drag and drop the image or PDF.

3

Type your target

Enter target size and choose KB or MB.

4

Run

Shrink44 iteratively binary-searches to hit your target.

5

Download

Get a file at — or just below — your target.

Features

Why use Shrink44 for this

Designed for fast, private, no-signup file size reduction.

Exact KB / MB target

Binary-search compression to hit a precise size.

Works on images & PDFs

One platform for every file type.

Resize + compress combined

Both levers used to hit your target.

Bulk targets

Apply one size target to a batch.

100% client-side

No upload of sensitive documents.

Free

No quota, no signup.

FAQ

Frequently asked questions

Can Shrink44 hit an exact 500 KB target?

Yes. Type 500 KB and Shrink44 iteratively searches the quality / resolution combination that lands at or just under 500 KB.

Why iteratively? Why not just calculate the right quality?

JPEG and PDF compression ratios depend on image content, so no single quality setting hits a target reliably. Binary search gets there in 5–8 passes.

Does this work for PDF too?

Yes — the PDF Compress tab uses iterative DPI / quality reduction to hit a target.

Explore

Related Shrink44 tools

Try one of these focused compressors and guides.

PDF

Compress PDF

Reduce PDF size up to 85% smaller.

Image

Compress Image

Shrink JPG, PNG and WebP images.

JPG

Compress JPG

Optimize JPEG photos for the web.

PNG

Compress PNG

Shrink screenshots and graphics.

WebP

Compress WebP

Re-encode WebP for smaller payloads.

Resize

Resize Image

4K and social-media presets.

Bulk

Bulk Compress

Process 1000+ files at once.

Convert

Convert Image

PNG↔JPG, JPG↔WebP and more.

Ready to compress?

Free forever. 100% private. No signup. Files never leave your device.

Compress File Now