Compress PDF Online — Free PDF Compressor
Reduce any PDF to 100 KB, 200 KB, 300 KB, 500 KB, 1 MB, or any custom size — in seconds. The smartest PDF compressor on the web, with exact target sizes that other tools just can't match.
All files are deleted immediately after compression. We do not host or store any files on our servers — your PDFs never leave the processing memory for more than a few seconds.
How to Compress a PDF in 3 Steps
It really is that simple. No software, no signup, no hassle.
Upload Your PDF
Drag & drop your file or click the upload box. Files up to 50 MB are supported.
Pick a Size
Choose 100 KB, 200 KB, 300 KB, 500 KB, 1 MB or type your own custom target.
Download
Your compressed PDF is ready in seconds. Click download — your file is then deleted from our server.
Why Our PDF Compressor is Different
Built for people who need real results, not vague "low / medium / high" guesses.
Hit Exact Target Size
Need compress PDF to 100kb for an exam portal? Or compress PDF 300 kb for a visa form? Type the exact KB and we hit it.
Blazing Fast
Server-side compression engine processes most PDFs in under 5 seconds. No waiting in queues.
Privacy First
Files are deleted from our servers within minutes. We never read, store, or share your content. No accounts needed.
Works Everywhere
Windows, Mac, Linux, Android, iPhone, iPad. If it has a browser, you can compress PDF on it.
Quality Preserved
Smart image down-sampling keeps text crisp and tables readable. Scans shrink without becoming illegible.
Truly Unlimited
No daily limits, no file count caps, no premium upsells. Compress 1 PDF or 1,000 — it's free either way.
Common PDF Compression Targets
Pick the right size for your situation.
Trusted by People Like You
Whoever you are, our PDF compressor was built for you.
Students
Submit assignments, exam forms, and applications without "file too large" errors.
Job Seekers
Upload resumes to portals that cap files at 200 KB or 500 KB — no quality loss.
Lawyers
Email contracts and case files without bouncing past inbox attachment limits.
Photographers
Share portfolio PDFs that load fast — even on slow connections.
Small Business
Archive invoices and reports in compact PDFs. Save cloud storage costs.
Designers
Send presentation decks that don't choke client inboxes.
Frequently Asked Questions
Everything you need to know about our PDF compressor.
Is this PDF compressor really free?
Yes — 100% free, unlimited, no signup required. You can compress PDF as often as you want without paying or creating an account.
How do I compress a PDF to 100 KB exactly?
Upload your PDF, click the "100 KB" preset, then click Compress. Our engine iterates through quality levels until it hits your target. For sizes that aren't presets (e.g. 250 KB), use the custom field.
Will compression reduce the quality?
Some loss is unavoidable when shrinking a 5 MB scan to 100 KB — but for text-based PDFs the change is invisible. For photo-heavy files, pick a larger target like 500 KB or 1 MB to preserve detail.
Are my files safe?
Absolutely. Files are processed in memory, deleted from our server within minutes, and never read or shared. We don't host or store any files long-term.
Is there a file size or page limit?
You can upload PDFs up to 50 MB by default (admin can adjust this). There's no page count limit.
Can I compress a password-protected PDF?
Not directly — please unlock the PDF first using your password, then run it through our PDF compressor.
Do you support multiple files at once?
Currently one file at a time. Batch processing is on our roadmap.
Which devices work with this tool?
Any device with a modern web browser — Windows, Mac, Linux, Android, iPhone, iPad, even Chromebooks.
Ready to compress your PDF?
It takes less than 10 seconds. No signup, no email, no watermark.
🗜️ Compress PDF Now — Free