Can you compress a PDF without losing quality?

Yes — using structural (lossless) compression. This mode removes redundant data streams, optimises embedded objects, and re-saves the PDF structure without rasterising any page content. Text stays selectable, links work, and fonts are preserved. Savings: 10–60% depending on the PDF.

Which compression level should I use?

Use Less or Balanced if you need to keep text selectable — contracts, reports, invoices. Use Strong if maximum file size reduction is the priority and you don't need searchable text — scanned documents, image-heavy portfolios, photo books.

Does compressing a PDF affect print quality?

Structural compression (Less/Balanced) does not affect print quality — the document is identical in appearance and print output. Strong compression rasterises pages at a fixed DPI, which may reduce print sharpness if printed at very large sizes.

Why is my PDF still large after compression?

If your PDF consists mainly of high-resolution scanned photos, structural compression will have limited effect (10–20%). For these, use Strong mode which rasterises at an optimised DPI for 50–90% savings. Alternatively, remove unnecessary pages before compressing.

PDF ToolsMay 20266 min read

Compress PDF
Without Losing Quality.

Structural compression can reduce PDF size by 30–60% while keeping text fully selectable and readable. Here's how to compress without degrading your document.

No quality loss

Structural (Less/Balanced)

10–60%

Text selectable · links work · fonts preserved

Text becomes image

Rasterize (Strong)

50–90%

Visual appearance · all page content

Compress PDF Free

Savings with structural compression

Text stays selectable, links preserved

Savings with rasterize mode

Ideal for scanned image-heavy PDFs

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Pro tip

Rule of thumb: For text documents — use Balanced. For scanned documents — use Strong. If you're unsure which type yours is, try Balanced first and check the output file size. If savings are under 20%, switch to Strong.

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Structural mode keeps text selectable. Strong mode for maximum savings. Both free.

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