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Exact Size in KB
Set your target file size and we hit it precisely using intelligent binary search.
Free Forever · No Signup · No Watermark
Every tool you need to perfect your files
Compress, convert, merge, split, rotate, watermark, and protect your JPG, PNG & PDF files — instantly, in your browser.
- ✓ 100% Free
- ✓ No Signup
- ✓ Private & Secure
- ✓ Works on Any Device
Pick a tool, get it done
Every file tool you need — in one place.
Compress File
Shrink JPG, PNG & PDF to an exact size in KB.
Open tool →Increase Size
Enlarge images by 1.1×–4× with high quality.
Open tool →Convert Image
Convert between JPG, PNG, WEBP, AVIF, BMP, GIF, TIFF, ICO & more.
Open tool →Image to PDF
Combine images into a single PDF document.
Open tool →Merge PDF
Combine multiple PDFs into one file.
Open tool →Split PDF
Extract a range of pages into a new PDF.
Open tool →Rotate PDF
Rotate all pages by 90°, 180° or 270°.
Open tool →Watermark
Add a text watermark to your PDF.
Open tool →Protect PDF
Encrypt your PDF with a password.
Open tool →Built for speed, quality & privacy
Everything you need, nothing you don't.
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Live Preview
See before & after thumbnails with real file sizes side by side.
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Blazing Fast
Files processed in seconds with highly optimized algorithms.
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100% Private
Files never leave your server. No tracking, no logs, delete anytime.
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12 Pro Tools
Compress, convert, merge, split, rotate, watermark, protect and more.
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Fully Responsive
Beautifully optimized for mobile, tablet, and desktop.
Done in 3 easy steps
No installation. No signup. Just results.
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Choose a tool
Pick from 12 professional tools for images and PDFs.
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Upload your file
Drag & drop or browse. Supports files up to 100 MB.
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Download instantly
Preview, download, and delete from server with one click.
Frequently Asked Questions
Everything you need to know.
Is SK File Compressor really free?
Yes — every tool is 100% free, forever. No signup, no watermark, no hidden fees.
What file formats are supported?
Images: JPG, JPEG, PNG, WebP, AVIF, BMP, GIF, TIFF, ICO, HEIC. Documents: PDF. Files up to 100 MB each.
How does Target Size in KB work?
We run an intelligent binary search on compression quality to get your file as close as possible to your target size without going over.
Can I delete my files from the server?
Yes — after processing, click the Delete from Server button to remove the file immediately.
Are my files safe and private?
Absolutely. Files are processed on our own server and never shared. You control everything.
Do I need to install anything?
No. Everything runs directly in your browser — no extensions, no downloads, no setup.