📚 Help Center
Last Updated: April 1, 2026
Step-by-step guides for all our free tools. Click a guide to get started.
How to Compress a PDF File
Step-by-step guide to reducing PDF file size for email, upload, or storage.
How to Merge Multiple PDFs Into One
Combine two or more PDF files into a single document. Reorder pages easily.
How to Convert PDF to Word
Convert PDF documents to editable Word (DOCX) format while preserving formatting.
How to Split a PDF Into Separate Files
Extract specific pages or split a PDF into individual page files.
Getting Started with PDF Tools
A beginner's guide to using all our free online PDF tools effectively.
Frequently Asked Questions
Is this tool free to use?
Yes, all PDF tools on PDF0.ai are completely free with no registration required.
How secure is my uploaded file?
Files are processed in memory and automatically deleted after conversion. We never store your documents.
What file size is supported?
We support files up to 100MB for all PDF operations.
Does it work on mobile?
Yes, all tools are fully responsive and work on any device including smartphones and tablets.
How long does processing take?
Most operations complete in under 30 seconds depending on file size and complexity.
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Why Choose This Tool
Files processed in your browser. Nothing uploaded.
AI-powered processing in seconds, not minutes.
No hidden fees, no signup, no limits.
Any device, any browser. No installation needed.
How It Works
Upload
Drop your file or paste content into the input area
Process
Click the button and let AI do the heavy lifting
Download
Get your result instantly, ready to use
User Reviews
"I use this daily for my projects. The best free tool I've found online."
Freelancer"Great quality output. The AI features are surprisingly good for a free tool."
Designer"Finally a tool that just works without asking for my email first."
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