How does PDF compression work here?

This tool renders each PDF page to an HTML5 canvas element, then rebuilds the document with optimized image quality settings using JPEG compression. This approach effectively reduces file size for scanned documents and image-heavy PDFs. You can adjust quality levels to balance between file size and visual clarity. Completely free, browser-based, and requires no signup or server upload.

Will text quality change after compression?

Compression works best for scanned and image-heavy PDFs, where it achieves significant size reduction. For text-based PDFs with vector content, there may be some loss of sharpness since the tool rasterizes pages before recompressing. For best results with text documents, use higher quality settings. This free tool runs in your browser with no signup and no ads.

Can I control compression quality?

Yes. You can fine-tune the compression by adjusting JPEG quality (0-100%), render scale factor, and output dimensions. Higher quality settings preserve more detail but produce larger files, while lower settings maximize compression. We recommend starting at 70-80% quality for a good balance. This free tool runs entirely in your browser with no signup or server upload.

Is my PDF uploaded to a server?

No. All PDF compression processing happens 100% locally in your browser using client-side JavaScript libraries (pdf.js and jsPDF). Your PDF files are never uploaded to any external server, cloud service, or third-party platform. This ensures complete privacy and data security for sensitive documents. The tool is free with no signup, no ads, and no usage limits.

Is this PDF compressor free?

Yes, this PDF compressor is 100% free with no account required, no ads, no watermarks, and no usage limits. Every compression feature is available to all users without restrictions or premium tiers. The tool runs entirely in your browser, so no server resources are consumed and your documents remain completely private. No hidden fees or charges of any kind.

PDF Compress Tool

Reduce PDF size with adjustable quality and output resolution

Upload PDF File

Click to select a PDF file

or drag and drop one PDF here

Compression Settings

JPEG Quality: 0.70

Render Scale: 1.00

Max Page Dimension (px)

Lower value creates smaller files (best for scanned PDFs)

🌍 Used by 50,000+ users ⭐ 4.9/5 rating 🔒 100% Private 🚫 No Ads, No Signup

Why Use This PDF Compressor

🔒

100% Free & Private

No ads, no signup, no file upload. Everything runs locally in your browser. Your PDF files never leave your device.

🎚️

Adjustable Quality

Control quality and render scale for size/clarity balance.

📄

Great for Scans

Best compression results for image-heavy or scanned PDFs.

🔒

Privacy First

Everything runs in your browser with no server upload.

Frequently Asked Questions

Pages are rendered and rebuilt with optimized image settings.

This method is best for scanned PDFs; text PDFs may become less sharp.

Yes, use quality, scale, and max dimension controls.

No. PDF compression runs locally in your browser.

Yes, it is free without registration.

Yes, 100% free with no ads, no registration, and no usage limits. Unlike other PDF tools, your files are never uploaded to any server — all processing happens locally in your browser for maximum privacy.

PDF Compress Tool

Upload PDF File

Compression Settings

Why Use This PDF Compressor

100% Free & Private

Adjustable Quality

Great for Scans

Privacy First

Frequently Asked Questions

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