Compress PDF Online

Upload and Settings

Drag and drop a PDF file

or click to browse from your device

Output Quality

Quality %

Render Scale

Max Pages (optional)

Useful for very large PDFs when you only need the first pages compressed.

Upload a PDF to begin.

Compression Summary

This compressor works best for scanned and image-heavy PDFs. Text-native PDFs may show smaller size changes.

No compressed file yet

Run compression to see size savings and download output.

Compression completed successfully.

Processed Pages	-
Original Size	-
Compressed Size	-
Size Reduction	-
Output Format	Compressed PDF

How to Compress PDF Files

Upload PDF

Choose the PDF file you want to optimize for sharing or uploads.

Set Quality

Use quality and scale settings to balance readability and file size.

Compress

The tool processes each page in your browser and rebuilds a smaller PDF.

Download

Save your optimized PDF and use it for email, forms, and portal uploads.

Related Guides

PDF Guide

How to Reduce PDF File Size Without Losing Quality

Why PDFs get large, which quality setting to pick, and what to do with scanned documents.

Compression Guide

How to Compress Files Without Losing Quality

Learn practical compression trade-offs and how to preserve detail while reducing size.

Print Settings

Understanding Resolution, DPI, and PPI

Use the right quality and scale settings when compressed PDFs still need readable print output.

Workflow

How to Extract Text from Images Using OCR

Next step after compression: run OCR when your PDF includes scanned pages and screenshots.

Related Tools

PDF to JPG JPG to PDF OCR Document Tools Hub

Why Use Snipinsta's PDF Compressor?

Reduce PDF file size for email, portal uploads, and storage — entirely in your browser with no server upload required.

Adjustable Quality

Quality slider from 45% to 95% lets you balance file size reduction against visual fidelity.

Browser-Side Only

pdf.js and jsPDF run entirely in your browser. Your PDF is never uploaded to any server.

Render Scale Control

Choose 1.0×, 1.3×, or 1.6× render scale to control sharpness vs file size trade-off.

Before/After Stats

See original and compressed file sizes instantly so you can tune settings before downloading.

No Install Required

Works in any modern browser on desktop and mobile. No Acrobat or software needed.

Free & No Signup

No watermarks, no account required.

Common Use Cases

Email Attachments - Shrink large PDFs to get under 10 MB or 25 MB email attachment limits.

Portal & Form Uploads - Meet the file-size limits of government portals, application forms, and recruitment platforms.

Storage & Archiving - Reduce cloud storage usage when archiving large scanned document collections.

Mobile Sharing - Compress PDFs so they load faster and share quicker over mobile data connections.

Frequently Asked Questions

Each page of your PDF is rendered to a canvas using pdf.js, then re-encoded as a JPEG-compressed image at your chosen quality level, and assembled into a new PDF using jsPDF. This reduces file size by lowering image fidelity.

No. The entire compression process runs in your browser using pdf.js and jsPDF. Your file never leaves your device.

You can adjust JPEG quality (45–95%) and render scale (1.0×, 1.3×, 1.6×). Lower quality and lower scale produce smaller files; higher values preserve more detail but reduce the size benefit.

There is no server-side limit since processing is browser-based. Large PDFs (100+ pages or print-quality originals) will process more slowly depending on your device performance.

Because the compressor re-renders pages as JPEG images, text and vector elements become raster images in the output. The PDF will display and print correctly but text will no longer be selectable or copy-pasteable.

Yes, completely free with no watermarks and no account required.