Online PDF Tool

Compress PDF

Reduce PDF size while keeping readable quality.

Features

Strong image downsampling and JPEG recompression for smaller files

Strength presets: strong to minimal, plus optional grayscale

Custom target DPI and image quality overrides

Strip document metadata (title, author, keywords) for privacy

Before/after file size stats with percentage saved

Smart output: keeps the original if compression would increase size

Secure one-hour auto-delete

How to use

1
Upload the PDF file you want to compress.
2
Choose compression strength, and optionally adjust image DPI, quality, grayscale, or metadata stripping.
3
Download the optimized PDF and review the before/after size comparison.

Related tools

merge pdf split pdf pdf to jpg

Compress file

PDF file

PDF up to the server upload limit (default 100MB).

Drop files here or browse

PDF files up to 100MB

Compression strength

Stronger settings shrink images more. Minimal keeps the closest match to the original.

Target image DPI

Override the preset default. Auto uses the quality preset's DPI.

Image quality

Controls JPEG recompression quality for embedded images. Auto uses the preset default.

Convert to grayscaleReduces size for color scans and documents when color is not needed.Strip metadataRemove title, author, keywords, and other document metadata for privacy or size reduction.

Frequently Asked Questions

Does compression reduce quality?

Stronger presets shrink embedded images more (like “screen/ebook” modes on other sites). Use “minimal” or “light” when you need the closest match to the original.

How big can my PDF be?

The default max upload size is 100MB and can be changed via env.

Is there a daily limit?

Rate limiting is enabled per IP to keep the service stable for everyone.

What if my file doesn’t get smaller?

If the PDF is already well-optimized, the tool returns the original file unchanged and reports 0% reduction.

Files are automatically deleted after one hour for privacy.