PDF Compressor Web

by J.G.Moore
🔒 Your files never leave your device. All processing happens in the browser.

Select a PDF to compress

The tool analyses your PDF and shows real output sizes before you save anything.

Drop a PDF here or click to browse

Maximum file size: 200 MB

Analysing & compressing…

Scanning file structure…

·

What's taking up space

✦ Recommendation

MB

Enter a target if you need the PDF under a specific upload limit.

Choose a compression option

Lossless cleanup

Strips redundant metadata and Photoshop data. No quality change. Instant.

Or compress images (lossy)

Compress images

Re-encodes and downsamples embedded images. Also strips metadata and Photoshop data. Text, vectors and fonts untouched.

%
Smaller file Better quality

Or flatten to images (lossy)

Flatten to images

Renders each page as a JPEG image. Produces the smallest files for vector-heavy PDFs. Text becomes rasterised (not selectable).

%
Smaller file Better quality

Or try structural cleanup

Structural cleanup

Uses qpdf WebAssembly to repack object streams and recompress PDF structure. Best for already image-optimised files; not a primary target-size mode.

Compressing…

Starting compression…

0%
✓

Done!

Original
Compressed
Reduction
Original Compressed

More PDF Tools

📦 Compress 📃 Merge ✂ Split 🔄 Pages 🔒 Protect 🔍 OCR

Why PDF Compressor Web?

🔒

100% Private

Your files never leave your device. All compression happens in the browser. Nothing is uploaded anywhere.

🔎

Smart Analysis

See exactly what's inside your PDF (images, fonts, vectors, metadata) before you compress.

⚙️

3 Compression Modes

Choose lossless cleanup, image compression, or full flatten. Calibrated size estimates included.

🛠️

Free & Open Source

No sign-ups, no limits, no ads. View the source code on GitHub.

How It Works

1

Drop your PDF

Drag and drop or click to select a file up to 200 MB.

2

Choose a mode

See a full breakdown and pick the compression that fits your needs.

3

Download

Your compressed PDF downloads instantly. The original is never modified.

Compression Modes

Lossless Cleanup

Strips duplicate metadata, Photoshop data, and redundant objects. Zero quality loss, the output is visually identical. Best for PDFs with bloated metadata from editing tools.

Compress Images

Re-encodes and downsamples embedded images with adjustable quality and DPI. Also strips metadata and Photoshop data. Text, vectors, and fonts stay untouched. Best for PDFs with large photos or scanned content.

Flatten to Images

Renders each page as a JPEG and rebuilds the PDF. Produces the smallest files for vector-heavy documents. Text becomes rasterised and is no longer selectable.

Find this tool useful? ☕ Buy me a coffee on Ko-fi