Compress PDF — Reduce File Size Free
Shrink oversized PDFs before emailing or uploading them. An honest note up front: this tool re-saves your PDF to strip metadata and redundant data — it does not recompress your images, so quality is never touched.
How it works
Choose your PDF
Drop the file below or click to browse. It stays on your device the whole time.
Compress in one click
The tool rewrites the file structure, clearing embedded metadata and duplicate objects.
Compare and download
See the before/after sizes side by side, then download the smaller file.
Drop a PDF here or click to choose one
Best for files with heavy metadata · processed locally
Result:
Private by design: your PDF is compressed locally in your browser and never leaves your device. What this tool removes: document metadata (title, author, producer) and redundant internal objects. What it never touches: your images, text and layout.
Frequently asked questions
How does SwiftPDF compress a PDF?
The tool re-saves your PDF in your browser, which strips document metadata (title, author, producer) and removes redundant internal objects. It does not recompress images, so quality is never reduced.
Will compression reduce the quality of my PDF?
No. Because only overhead and metadata are removed, the visible content — text, images and layout — is identical to the original.
Why didn't my file get much smaller?
If a PDF is already well optimized, there is little overhead left to remove. The biggest wins come from files exported by software that embeds bulky metadata or duplicate objects. For image-heavy PDFs, re-exporting at lower image quality in your source app helps more.
Is my PDF uploaded to compress it?
No. Compression happens entirely in your browser. Your file never leaves your device.