Compress a PDF
Reduce PDF file size while keeping good quality.
PDF too heavy for an email, an online form or WhatsApp? PDF Atlas optimizes the file structure and downsizes images according to the level you pick. “Light” is lossless; “Recommended” and “Extreme” give the biggest savings for scanned documents.
How to compress a pdf in 3 steps
Add your file
Click “Select” or drag and drop the file. It stays on your device.
Compress a PDF
Pick the compression level: light, recommended or extreme.
Download the result
Your file is ready in seconds, with no watermark and no sign-up.
Why use Compress PDF on PDF Atlas?
100% private
Your documents are processed in your browser and never uploaded.
Free & unlimited
No account, no watermark, no daily limit.
Fast
No upload time: results are instant.
Works everywhere
Computer, tablet or phone, on every system.
Frequently asked questions
How much smaller will my file be?
It depends on the content. Scanned or photo-heavy PDFs can shrink by 50–90%; text-only PDFs shrink less.
Will the text stay selectable?
Yes with the “Light” level. “Recommended” and “Extreme” turn pages into optimized images for maximum savings.
Is Compress PDF free?
Yes, the Compress PDF tool on PDF Atlas is completely free, with no sign-up, no limits and no watermark.
Are my files safe?
Yes. Processing happens locally in your browser: your files are neither uploaded nor stored on a server.