Compress PDF Online — Shrink File Size for Free
A bloated PDF is usually carrying duplicated fonts and uncompressed structure. This tool re-serializes the file to remove that overhead, entirely on your device.
Open the PDF CompressorWhy use this
- •Runs in your browser — no upload required
- •No account or watermark
- •Works alongside other tools like Split and Rotate for a full cleanup pass
How it works
- 1.Select the PDF you want to shrink
- 2.Click compress and wait a moment while it re-serializes the file
- 3.Download the smaller result
Read more
How to Reduce a PDF's File Size: What Works and What Doesn't
Why PDFs get large, which fixes actually shrink them, and an honest look at what a browser-based compressor can and cannot do.
Merge PDF Files Without Uploading Them Anywhere
Combine several PDFs into one in your browser. No upload, no sign-up, no watermark, no file-size cap set by a server.
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Frequently asked questions
- Will compression reduce quality?
- This tool deduplicates structural overhead (fonts, object streams) rather than recompressing embedded images, so visual quality is unaffected.
- Does it work on scanned, image-heavy PDFs?
- It helps less on image-heavy files, since the size there comes from embedded images rather than structure — resizing the source images first gives a bigger win for those.