Compress PDF
Drop in a PDF and choose a quality level — High (150 DPI), Medium (96 DPI) or Low (72 DPI). Each page is rendered to a JPEG and reassembled into a new PDF, typically dropping file size by 3-10x for scan-heavy or image-heavy documents. IMPORTANT: this is a lossy process — selectable text and vector graphics in the original PDF become flat images, so the output PDF is no longer searchable or copy-pastable. Use this when size matters more than text fidelity (e.g. emailing scans). Everything runs locally in your browser.
Drop .pdf file here
or click to choose
Options
Privacy
Runs entirely in your browser — nothing is sent to any server.
Cost
Free. No sign-up, no watermark.
Supports
.pdf → .pdf
Related tools
Tools that work with the same formats — most users open one of these next.
Merge PDF
Combine multiple PDF files into a single PDF — in the order you select them, all in your browser.
Rotate PDF Pages
Rotate selected pages of a PDF by 90, 180 or 270 degrees — in your browser.
Delete PDF Pages
Remove specific pages or ranges from a PDF — in your browser, with no upload.
Extract PDF Pages
Pull selected pages out of a PDF into a new, smaller PDF — entirely in your browser.
Reorder PDF Pages
Rearrange the pages of a PDF into any order — all in your browser, no upload.
Add Watermark to PDF
Stamp a text watermark across every page of a PDF — in your browser, no upload.
Frequently asked
Is Compress PDF free to use?
Yes. Compress PDF is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.
Do my files and data stay private?
Yes — Compress PDF runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.
How does Compress PDF work?
Open Compress PDF, drop in your PDF file, choose any options, and click Convert. Your browser does the work locally and produces a PDF file you can save right away.
What's the maximum file size for Compress PDF?
Because Compress PDF runs in your browser, the maximum size depends on your device's available memory. Most modern phones and laptops handle files up to a few hundred MB without issues.