PDF Tool

PDF Compressor

Optimize a PDF file in your browser and download a cleaned copy. Useful for reducing overhead, rebuilding file structure, and preparing PDFs for sharing.

Runs in browserPDF optimizationFree & no signup

Input

Drop a PDF here

or click to browse

Settings

This optimizer rebuilds the PDF with compressed object streams and removes editable metadata. It does not rasterize pages, so text and vectors remain selectable.

How to compress a PDF

The tool rebuilds the PDF's internal structure in your browser — no upload, no server.

01
Drop your PDF in
Drag the file onto the upload area or click to browse. Works with any standard PDF — reports, invoices, forms, presentations.
02
Click Optimize PDF
The tool rewrites the PDF's object streams and strips editable metadata. This is lossless — text stays selectable, images stay sharp.
03
Check the size difference
You'll see the original and optimized file sizes side by side. If the PDF was already well-optimized, the saving may be small. If it was exported from Word or a design tool, you'll often see 20–50% reduction.
04
Download
Save the optimized PDF. It's a standard PDF — opens in any viewer.

What can you use it for?

Email attachments

Many email providers cap attachments at 10–25 MB. Compressing a bloated PDF export often gets it under the limit without any visible quality loss.

Client portals and CMS uploads

Upload limits on portals, intranets, and CMS platforms are a constant annoyance. Compress first, upload second.

PDFs exported from Word or Google Docs

Office-exported PDFs often carry unnecessary metadata and unoptimized streams. This tool cleans that up.

Sensitive documents

Because everything runs in your browser, you can compress confidential contracts, financial statements, and medical records without them ever leaving your device.

Frequently asked questions

Free, no account, no watermarks.

No. The entire process runs in your browser using pdf-lib. Your file never leaves your device.

It depends on how the original PDF was created. Office exports and design tool PDFs often shrink 20–50%. PDFs that are already optimized or consist mainly of scanned images may barely change.

No. This tool optimizes the PDF's internal structure — it doesn't downsample images or re-encode content. Text stays selectable and images stay at their original resolution.

Some PDFs are already well-optimized, or their bulk comes from high-resolution images that this tool doesn't touch. For image-heavy PDFs, you'd need a tool that downsamples images — which trades quality for size.

No. The browser can't safely rewrite an encrypted PDF's contents. Remove the password first if you have it.

Yes, though large files process faster on desktop where there's more available memory.

Report an Issue

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How to compress a PDF

The tool rebuilds the PDF's internal structure in your browser — no upload, no server.

Drop your PDF in

Drag the file onto the upload area or click to browse. Works with any standard PDF — reports, invoices, forms, presentations.

Click Optimize PDF

The tool rewrites the PDF's object streams and strips editable metadata. This is lossless — text stays selectable, images stay sharp.

Check the size difference

You'll see the original and optimized file sizes side by side. If the PDF was already well-optimized, the saving may be small. If it was exported from Word or a design tool, you'll often see 20–50% reduction.

Download

Save the optimized PDF. It's a standard PDF — opens in any viewer.