Reduce PDF file size without quality loss. Three compression levels to choose.
Click or drag and drop a PDF file
Files are not uploaded to a server — processed in your browser
Высокое качество (~92%), сохраняются мелкие детали и текст.
Баланс между качеством (~75%) и размером для быстрой отправки.
Максимальное сжатие (~55%) для экономии трафика и места.
This PDF is already compact — compression did not make it smaller
. Keep the original or try the “Maximum” level.
Re-saves pages as compressed images — shrinks scans and photo-heavy PDFs the most.
Text in the compressed file becomes part of the picture: it can no longer be selected or searched.
Files are not uploaded to a server — processing happens entirely on your device
Three compression levels: from minimal to maximum
Compression is most effective for PDFs with large images
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Compress PDF Online — Reduce File Size
Free online tool to compress PDF files. Reduces document size by optimizing images — choose from three compression levels. Processing happens entirely in your browser — files are never sent to a server, ensuring complete privacy.
How to Compress a PDF File
- Upload your PDF — click the upload area or drag and drop a file. You will see the current file size.
- Choose compression level — light (maximum quality), medium (balanced), or maximum (smallest size).
- Click "Compress" — wait for processing. You will see the new file size and compression percentage.
- Download the result — download the compressed PDF with one click.
Compression Levels
| Level | Quality | Typical Compression | Best For |
|---|---|---|---|
| Light | Maximum | 10-30% | Printing, archives, documents with fine text |
| Medium | Good | 30-60% | Email attachments, web uploads, cloud storage |
| Maximum | Acceptable | 50-80% | Mobile devices, quick sharing, saving space |
Features
| Feature | Description |
|---|---|
| 3 compression levels | Choose the balance between quality and file size |
| Size comparison | Shows size before and after compression with reduction percentage |
| Privacy | Files are processed locally and never leave your device |
| Fast processing | Compression takes seconds right in your browser |
| No watermarks | Compressed PDF contains no additional marks or branding |
| No registration | No account or subscription required — the tool is completely free |
Use Cases
- Email attachments — reduce PDF to fit within attachment limits (typically 10-25 MB).
- Web upload — shrink PDF size for faster page loads and bandwidth savings.
- Cloud storage — save space in Google Drive, Dropbox, or OneDrive.
- Print documents — use light compression to maintain quality for printing.
- Mobile devices — compressed PDFs open faster and use less storage.
How Compression Works
The tool renders each PDF page as a JPEG image at the selected quality level, then reassembles the document from the optimized pages. This is especially effective for PDFs with large embedded images, photos, and scans. For text-only PDFs without images, compression will be minimal since the text layer is already compact.
Also try: Merge PDF, Split PDF, PDF to JPG, PDF to Word.
FAQ
Ответы на популярные вопросы о работе инструмента
01
Is quality lost during compression?
Light compression has virtually no visible impact — differences are unnoticeable on screen and in print. Medium and maximum compression reduce image quality, but text remains readable. Choose the level based on the document's intended use.
02
Why does a text-only PDF barely compress?
If the PDF contains only text without images, compression will be minimal (1-5%). The tool specifically optimizes images inside the PDF. Text-only documents are already small in size.
03
What is the maximum file size?
There are no limits — processing happens in your browser. However, files over 100 MB may require more RAM and processing time.
04
Can I compress multiple files at once?
Currently the tool processes one file at a time. For batch processing, upload files one after another.
05
Is it safe to compress PDFs online?
Yes! All operations run in your browser using JavaScript. Files never leave your device and are never sent to a server.
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