How to Compress PDF Files with Zlet AI – Step-by-Step Guide (2025)
In 2025, Zlet AI offers one of the most powerful and completely free PDF compressors available online. Reduce your PDF file size by up to 90% while keeping text and images crystal clear — all in your browser, no software installation, no sign-up, no watermarks added.
Whether you need to email a large report, upload a resume faster, or save storage space, Zlet AI’s PDF Compressor gives you two smart modes: lossless recompression and advanced rasterization. Here’s exactly how to use it like a pro.
Step 1: Go to Zlet AI PDF Compressor
Simply visit www.zletai.com → search or click “PDF Compressor”. The tool opens instantly — no login required.
Step 2: Upload Your PDF
- Drag & drop your PDF into the large dashed box, or click to browse.
- Supports PDFs up to 100 MB and any number of pages.
- Everything happens in your browser — your file never leaves your device.
Step 3: Choose Your Compression Mode
Zlet AI gives you two powerful options:
| Mode | Best For | Size Reduction | Quality Impact |
|---|---|---|---|
| Smart Rasterize (Recommended) | Scanned documents, image-heavy PDFs, forms | 60–90% smaller | Very high (adjustable) |
| Recompress (Lossless) | Text documents, presentations, contracts | 20–50% smaller | 100% identical quality |
Step 4: Fine-Tune Settings (Only in Smart Rasterize Mode)
- Image Quality Slider – Move left for smaller files, right for better quality (default 90% is perfect for most users).
- Maximum Dimension – Set max width/height (e.g., 1200px) to downscale huge scanned pages.
Step 5: Click “Compress PDF” and Download
- Watch the real-time progress bar — Zlet AI shows exactly which page is being processed.
- When finished, see original vs compressed size + percentage saved.
- Click the download button — your new smaller PDF downloads instantly.
Real Results Users Get with Zlet AI
| Document Type | Original Size | After Zlet AI | Savings |
|---|---|---|---|
| Scanned 50-page report | 48 MB | 4.2 MB | 91% smaller |
| Image-heavy portfolio | 22 MB | 3.8 MB | 83% smaller |
| Text contract (Recompress mode) | 8.5 MB | 2.1 MB | 75% smaller |
Pro Tips from Daily Zlet AI Users
- Use Smart Rasterize + 85–90% quality for scanned documents — best balance.
- Use Recompress mode when you need 100% identical quality (legal docs, signed PDFs).
- Set max dimension to 1200px for resumes — recruiters love fast-loading files.
- Combine with Zlet AI’s PDF to Image tool if you need even smaller files for social media.
Stop waiting for slow uploads and huge attachments.
Compress any PDF in seconds — completely free, unlimited, no signup needed.
Open Zlet AI PDF Compressor Now (100% Free)
