Compress PDF online.
No upload ever.
Each page is rendered locally and re-encoded at your chosen quality level. Your file never leaves your browser.
Free · No account · No upload
Drop your PDFs here
PDF files only · processed entirely in your browser
Three steps. Done in your browser.
Drop your PDF
Drag a PDF onto the zone or click to browse. No file size limit — all processing is local.
Choose a quality level
High, Medium, or Low. Each page is rendered to canvas and re-encoded as a compressed image.
Download the result
Per-page progress is shown. The compressed PDF downloads directly to your device when done.
Choosing the right quality setting.
The quality setting controls how aggressively each PDF page is re-compressed. Higher quality means larger files; lower quality means smaller files with softer detail.
| Quality | Best for | Typical reduction |
|---|---|---|
| High | Print, archive, client-facing reports | 10–30% smaller |
| Medium | Email attachments, everyday sharing | 40–60% smaller |
| Low | Internal notes, rough drafts | 60–80% smaller |
Why compress a PDF?
PDF files can balloon to enormous sizes when they contain embedded photographs, high-resolution scans, or graphics-heavy slides. A single scanned contract can easily reach 20–30 MB — well above the 10 MB limit most email providers enforce on attachments.
Compressing a PDF before sharing removes that friction entirely. Whether you're sending a quote, submitting an assignment, uploading to a government portal, or archiving invoices — a smaller PDF is universally easier to handle.
- Email attachments. Gmail, Outlook, and most providers limit attachments to 10–25 MB. Compress first and it attaches without issues.
- WhatsApp and messaging apps. WhatsApp supports document sharing up to 2 GB, but large files take minutes over mobile data and cost more. A compressed PDF sends in seconds and uses a fraction of the data.
- University and government portals. Many submission systems impose strict limits — often 5 MB or less. A compressed PDF almost always fits.
- Embedding PDFs on websites. Web-embedded PDFs load faster when smaller, improving the experience for visitors on mobile connections.
- Cloud storage savings. If you archive large volumes of PDFs, compression can cut your storage footprint by half or more.
How it works under the hood.
Unlike most online compressors that upload your file to a remote server, our tool runs entirely inside your browser tab. When you drop a PDF, it uses PDF.js (Mozilla's open-source library) to render each page as a canvas element, then re-encodes every page as a compressed JPEG image before bundling the result using jsPDF.
Your PDF never leaves your device. There is no upload, no server, and no risk of your confidential documents being stored or accessed by anyone else.
Privacy by architecture
Your PDF never leaves your browser.
Most online PDF tools upload your document to a server for processing. This tool is architecturally different: every page is rendered and re-encoded by your own CPU using PDF.js and the Canvas API. No server receives your document at any stage.
- No file data transmitted over the network at any point
- No account, sign-in, or email required to use any feature
- Closing the tab clears all data from browser memory completely
- Open-source processing: PDF.js (Mozilla) and jsPDF