Compress PDF
Reduce PDF file size while keeping quality. Free and instant.
Drop your PDF here to compress
or click the button below to browse your files
Frequently asked questions
Other Free PDF Tools
Compress PDF Online — Free & Private
PDFcraft's free PDF compressor reduces your PDF file size instantly in your browser — no uploads, no sign up, and no watermarks. Whether you need to compress a PDF for email, WhatsApp, or website upload, PDFcraft makes files smaller without visible quality loss.
What does the Compress PDF tool do?
The free PDF compressor optimizes the internal structure of your PDF file to reduce its size. It removes redundant data, optimizes image compression, and cleans up unnecessary metadata — all without affecting the visible content of your document. Text always remains perfectly sharp. Images may have very slight optimization but remain completely readable and professional. The compression process runs entirely in your browser using JavaScript — your files never get sent to any server.
How to compress a PDF online — step by step
- Click Select File or drag your PDF into the upload area
- Your PDF loads locally in the browser — never uploaded anywhere
- Click Compress PDF to start the optimization process
- See the original vs new file size comparison
- Click Download to save the compressed PDF
Why use PDFcraft to compress PDFs?
- 100% free — no limits, no premium plan required
- No file uploads — compression happens locally in your browser
- No quality loss — text stays sharp, documents stay readable
- No sign up — open the tool and start immediately
- Works on mobile — compress PDFs on iPhone or Android
- Instant results — most PDFs compress in under 5 seconds
Common use cases for compressing PDFs
- Compress PDF for email — keep files under Gmail's 25MB limit
- Reduce PDF size for WhatsApp — stay under the 100MB file limit
- Compress PDFs for website upload forms and portals
- Reduce storage space for archived documents
- Compress scanned documents for faster sharing
- Make PDFs load faster when embedded on websites
Is compressing PDFs online safe?
With PDFcraft, completely safe. Your PDF is compressed locally in your browser — it never gets uploaded to any server. This is critical for confidential documents like financial reports, contracts, and medical records. PDFcraft cannot access your files even if it wanted to — all processing happens entirely on your device.