DinoConvert › Compress PDF privately
Compress a PDF Without Uploading It - Private & Free
Need a lighter PDF for an email or an online form? DinoConvert compresses it directly in your browser: the file stays on your device, which is handy for contracts, scans and invoices. Free, no account, no watermark.
Compress my PDF →How to compress a PDF privately
- Open the DinoConvert PDF tools and keep Compress selected.
- Drop your PDF file.
- Pick a level: Light, Balanced or Strong.
- Press Compress PDF.
- Download the smaller file and compare before sending.
Which compression level should you use?
- Light: best visual quality, smaller gain.
- Balanced: good default for email and sharing.
- Strong: biggest reduction, for files where legibility matters more than image quality.
Why a PDF is too big for email or forms
Large PDFs usually contain high-resolution images, scans at 300+ DPI or embedded fonts. Compression lowers image resolution and quality to cut weight. Try Balanced first, then Strong if the file is still too large for an attachment or portal limit.
More PDF tools on the same page
- Merge several PDFs into one.
- Split by page range, every N pages or one file per page.
- PDF to images (JPG, PNG, WebP) at 72, 150 or 300 DPI.
Compression levels at a glance
| Level | Best for | Result |
|---|---|---|
| Light | Documents where image quality matters | Best quality, smaller gain |
| Balanced | Email and everyday sharing | Good mix of size and quality |
| Strong | Strict size limits on forms and portals | Smallest file, softer images |
Frequently asked questions
Is it safe to compress a confidential PDF online?
Yes. With DinoConvert the file is processed in your browser and is not uploaded, so it stays on your device.
How do I reduce a PDF size for email?
Use Balanced compression first. If it is still too large, use Strong.
Does compression reduce readability?
Text stays readable at normal settings; images may look softer at Strong.
Can I merge and split PDFs too?
Yes, both tools are on the same page.
Does it work offline?
The processing is local, but you need an internet connection to load the page first.
Is there a limit or watermark?
No watermark and no account needed.
Shrink your PDF privately
No upload, no account, no watermark. Your files never leave your device.
Compress my PDF →