Compress PDF
Shrink PDF file size while keeping content crisp. Choose your trade-off.
Drop your PDF here, or click to browse
PDF up to ~100 MB · stays on your device
Updated 2026 · Maintained by the CrispPDF team
// How to use
How to use Compress PDF
- 1
Upload your PDF
Drop the file you want to shrink.
- 2
Pick a size target or quality preset
Aim for 100KB, 200KB, 1MB or pick High / Medium / Low quality.
- 3
Download the compressed file
We show the before/after size so you can verify the savings.
// Why CrispPDF
Why use CrispPDF for compress pdf?
CrispPDF runs entirely in your browser — your files never touch a server. No signup, no watermarks, no daily limits, no upsells. We built it because every other PDF site is slow, ad-stuffed, or hides the good features behind a paywall. CrispPDF is fast on a phone, fast on a laptop, fast on a 10-year-old machine. Output is byte-clean: signatures stay sharp, compressed PDFs stay readable, conversions preserve layout where the source allows. And because nothing leaves your device, even confidential documents are safe to process. Bookmark this page, share it with your team, and stop juggling five different PDF sites for five different tasks.
- No signup, no email gate
- No watermarks on output
- Files never stored on a server
- Works on phone, tablet, and desktop
// FAQ
Compress PDF — frequently asked questions
+How much smaller will my PDF get?
Image-heavy PDFs typically shrink 40–80%. Text-only PDFs are already small and may only shrink a few percent.
+Will compression hurt quality?
High preserves crisp text and images. Medium is the sweet spot for sharing. Low is best for email-sized attachments.
+Can I compress a PDF to under 100KB?
Yes — pick the 100KB target preset. Text-heavy PDFs hit 100KB easily; image-heavy PDFs may need 200KB for legibility.
+Is Compress PDF free?
Yes. Compress PDF on CrispPDF is 100% free — no daily limits, no signup, no watermarks.
+Are my files private?
Yes. Most tools run entirely in your browser, so your files never leave your device. For server-assisted tools, files are processed in memory and discarded immediately.
+Is there a file size limit?
Most PDFs up to ~100 MB work comfortably. Very large files may take a few extra seconds depending on your device.
+Do you keep my files?
No. We never store, log, or share your documents. Output is generated, downloaded, and forgotten.
+Do I need to install anything?
No. CrispPDF works in any modern browser — Chrome, Safari, Firefox, Edge — on desktop and mobile.
+Will there be a watermark on the output?
Never. Your output is clean, ready to sign, share, or print.
+Does it work on mobile?
Yes. CrispPDF is fully responsive and works on iOS Safari, Android Chrome, and every modern mobile browser.
+Do I need to create an account?
No. There's no signup, no email gate, no login wall. Open the tool and use it instantly.
+Is it safe for confidential documents?
Yes. Because processing happens in your browser, confidential files like contracts, medical records, and tax returns never leave your device.
+What happens if I close the tab mid-processing?
Nothing is saved server-side, so closing the tab simply cancels the operation. Just reopen the tool and try again.
+Can I use this offline?
After the page loads once, most tools continue to work even with a flaky connection since processing is local.