- Select the PDF file you want to compress.
- The tool processes it instantly and shows the size before and after compression.
- Download the compressed PDF and share it anywhere.
Everything runs locally in your browser. Your files are never uploaded, so compressing sensitive documents such as contracts, proposals and scanned IDs stays completely private.
Large PDFs are a daily annoyance: email services reject attachments over a few megabytes, forms refuse uploads, and slow connections make big files painful to open. Compressing the file first solves all of these problems. This tool reduces size by re-encoding the document with modern object streams, a technique that removes redundant structure without touching the visible content.
Tips
Scanned and image-heavy PDFs usually benefit the most, since their pages carry large embedded images with wasteful encoding. If a file barely shrinks, it was already well optimized — try compressing it before adding the final touches to your documents. Compressing before sending an email keeps attachments inside size limits, and the smaller file also uploads and downloads much faster.
Why use it
This PDF compressor is free, private and instant — no sign-up, no watermark and no file size caps. Because the work happens on your device, your documents never travel over the internet, and results appear in seconds. Smaller files are easier to email, faster to upload and cheaper to store. If you need a quick way to reduce a PDF file size without losing content, this tool gets it done in one click.
Real-world use cases
- Blog and e-commerce: Shrink product photos from 4MB to ~200KB before upload. Your pages load faster and Google PageSpeed scores improve.
- Email and forms: Many inboxes reject >10MB attachments. Compress once and you reliably stay under limits.
- Portfolio and social: Keep visual quality high at 75-85% while cutting bandwidth for viewers on mobile data.
How it compares
| Tool | Upload required | Privacy | Batch | Cost |
|---|---|---|---|---|
| This tool | No | 100% local | 1-by-1 (high quality) | Free |
| TinyPNG/Squoosh | Yes / No | Server or local | Yes | Freemium |
| Photoshop | No | Local | Yes | Paid |
For sensitive images or quick one-offs, a local browser tool wins on privacy and speed. For massive bulk jobs, a desktop app may be faster.
Pro tips
- For photos, try quality 78-82% first. You usually save 60-70% size with no visible loss.
- Scale down dimensions before lowering quality. A 4000px photo at 2000px is 4x smaller even at high quality.
- Keep a backup of the original. You can always re-export at lower quality, but you cannot recover detail after saving over the original.