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PDF Optimizer & Compressor

Reduce PDF file size while preserving high visual quality. Multiple production presets, target size calculator, and batch ZIP export.

100% Client-Side Privacy: All optimization runs locally in your browser sandbox. Your files are never uploaded to any remote server.
Initializing PDF Optimization Engines...

How to Use PDF Optimizer & Compressor

  1. Upload one or more PDF documents by dragging and dropping them into the upload box.
  2. Choose your compression preset: Smart Balanced (Recommended), Extreme Compression (Max reduction), Target File Size (e.g. <500 KB or <200 KB), Scanned Grayscale, or Custom.
  3. If you chose 'Target File Size', specify your desired maximum file size in KB or MB.
  4. Click 'Optimize PDF' to compress all pages locally using your browser's hardware-accelerated canvas engine.
  5. Inspect the live before/after size savings, preview optimized page thumbnails, and click Download to save your compressed PDF or download all as a ZIP archive.

Key Features & Privacy Guarantee

  • Multiple Production Presets: Instant selection for Balanced (50-70% reduction), Extreme (70-90% reduction), or High Quality print fidelity.
  • Target File Size Mode: Enter exact size limits (e.g. 200 KB or 500 KB) for government job applications (UPSC, SSC, State PSC), visa portals, and university forms.
  • Scanned Document / Grayscale Mode: Strip unnecessary color channels from scanned contracts and forms, cutting size by up to 90% while keeping text ultra-crisp.
  • Multi-File Batch Processing: Optimize multiple PDF files in one go and download individually or packaged together in a single ZIP file.
  • 100% Client-Side Privacy: Complete zero-upload security. PDF parsing, canvas re-encoding, and assembly run entirely in your local browser sandbox.
  • Page-by-Page Quality Preview: Inspect rendered pages in a high-resolution lightbox before downloading to verify readability.

Frequently Asked Questions

How does this client-side PDF optimizer reduce file size?

The optimizer parses your PDF document into its underlying structural elements and page layers. It resamples high-resolution embedded images, applies high-efficiency JPEG compression, cleans bloated metadata, and reconstructs the PDF using compressed object streams (Deflate/FlateDecode), all inside your browser's local memory.

How do I compress a PDF to under 200 KB or 500 KB for government forms?

Select the 'Target File Size' preset, enter '200' or '500' and select KB. The optimizer will automatically calculate the required DPI scale and JPEG compression factor per page to ensure the final document stays strictly within your specified file size threshold.

Are my confidential files (bank statements, taxes, IDs) uploaded to any server?

No, never! All processing is executed 100% locally on your computer or mobile device using WebAssembly and HTML5 Canvas. Your documents never leave your device and are never sent across the internet.

Can I optimize password-protected PDF files?

Yes. If an uploaded PDF is locked with a user password, the tool prompts you to enter the password to decrypt it locally before optimization.

What is the difference between Extreme and Balanced compression?

Balanced compression maintains crisp text and images at around 120 DPI (ideal for web viewing, sharing, and emailing), reducing size by 50-70%. Extreme compression scales images to 96 DPI with stronger compression, reducing size by up to 90% for strict file upload limits.