What is the best way to reduce PDF file size?

The fastest method is using an online compressor like FixTools that re-encodes images and strips metadata. For more aggressive reduction, remove unnecessary pages first with a PDF splitter, then compress the remainder.

How much can I reduce a PDF file size?

Scanned PDFs (which are essentially images) can be reduced by 50–80%. Text PDFs compress less — typically 10–30%. Mixed PDFs with photos and text fall somewhere in between.

Does reducing PDF size affect text search and copy?

No. Compression only affects embedded images. Text, hyperlinks, and form fields remain fully functional in the compressed PDF.

Can I reduce PDF size without any quality loss at all?

Lossless PDF optimisation (stripping metadata, duplicate fonts, and unused objects) can reduce size by 5–20% with zero quality impact. For greater reduction, some lossy image recompression is necessary.

What is the smallest a PDF can get?

A single page text-only PDF can compress to just a few kilobytes. For image-heavy PDFs, the floor is roughly the minimum resolution needed to read the content comfortably — typically 72–96 DPI for screen use.

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Reduce PDF File Size Online

Reducing PDF file size is one of the most common document tasks — whether you're clearing storage space, meeting an upload limit, or simply speeding up a file transfer. FixTools reduces your PDF file size instantly and for free, processing everything in your browser so your document never touches an external server.

⚡ Use Tool Now How it works

Cost: Free forever
Sign-up: Not required
Processing: In your browser
Privacy: Files stay local

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Instant compression in the browser

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No account or sign-up required

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No watermark on output

PDF Tool

PDF Compressor

All processing happens in your browser — your files are never uploaded to any server.

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How to use this tool

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Upload any PDF and click compress. The tool automatically applies the best compression strategy for your file's content — optimising images, stripping redundant data, and re-encoding to reduce size.

How It Works

Step-by-step guide to reduce pdf file size online:

1
Open the compressor
Go to the FixTools PDF Compressor — it runs entirely in your browser.
2
Upload your PDF
Click the upload zone or drag your PDF file in.
3
Adjust compression strength
Choose low, medium, or high compression depending on how much size reduction you need versus quality preservation.
4
Download the smaller PDF
Click "Compress PDF", then download the result. Compare the before and after sizes to confirm the reduction.