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Upload a PDF to reduce its file size
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Compressing…
PDF Compressed!
File size reduced.
HOW IT WORKS
Compress a PDF in 3 Steps
1
Upload PDF
Select or drag the PDF you want to make smaller.
2
Choose Level
Pick Low, Medium, or High compression based on your quality vs. size preference.
3
Download
See the size reduction and download your compressed PDF instantly.
FAQ
Compress PDF — FAQ
How much will the PDF size be reduced?▼
It depends on the PDF content. Image-heavy PDFs can be reduced by 30-70%. Text-only PDFs may see 5-15% reduction. The compression level you choose also affects the result.
Will compression affect text quality or readability?▼
Text in PDFs is vector-based and is not affected by compression. Only embedded raster images are resampled at lower quality on High compression settings.
Why is my compressed file the same size or larger?▼
This can happen with PDFs that are already highly optimized, contain minimal images, or use specialized compression internally. In these cases, pdf-lib's rebuilding process may produce similar or slightly larger output.