Is FileSwiftly really free?

Yes — every tool on FileSwiftly (PDF, image, video, audio conversion and editing) is 100% free with no signup, no watermark, and no file size limits.

Are my files safe on FileSwiftly?

Files are processed on our secure servers and automatically deleted within 1 hour. We never store, share, or sell your data.

Do I need to install anything?

No installation required. FileSwiftly runs entirely in your browser on any device — desktop, tablet, or mobile.

Is there a file size limit?

FileSwiftly handles files up to 100MB for most tools. For larger files, just split or compress first.

Does FileSwiftly support batch processing?

Yes — batch resize, batch convert, and batch compress are available for images, PDFs, and audio files.

Expert Guide 2026 6 min read • Updated April 1, 2026

How to

A PDF file that is too large (over 20 MB) often blocks email attachments in Gmail or Outlook. Learn how to reduce your document size by up to 10× using DPI optimization and smart compression algorithms.

Why is your PDF file so large?

A PDF's file size is not determined by page count, but by the embedded resources. Unoptimized documents often contain high-resolution images (300+ DPI) and redundant font data. For web sharing or administrative submissions, an optimized file should not exceed 2 MB.

Ghostscript technology: the secret behind lossless compression

FileSwiftly uses the industrial-grade Ghostscript engine. Unlike basic compression tools that pixelate your documents, Ghostscript intelligently resamples images and strips unnecessary metadata.

This method can reduce a 15 MB file to just 1.5 MB with no visible difference on a standard screen.

Understanding the 3 compression levels (DPI)

The right level depends on your final use case. Here's how to choose your setting:

Frequently Asked Questions

Is my data secure?

Absolutely. Your files are processed over an encrypted SSL connection and automatically deleted from our servers after 60 minutes. No human has access to your documents.

Will text remain selectable?

Yes. Unlike a screenshot, our tool preserves the text layer (OCR or native text). You can still copy-paste and search text in the compressed PDF.

Why didn't my PDF get smaller?

If your file is already composed purely of vector text, or was previously optimized by professional software, the margin for reduction is minimal.

Reduce your document size now

Fast, free and no installation required. Compress your PDFs securely with FileSwiftly.

Compress a PDF for free