Folium is a collection of 20 browser-based PDF tools that process your files entirely on your device. No server. No storage. No account. No fees.
PDF tools are everywhere online. But look closely at most of them and you'll find something uncomfortable: your files are uploaded to a third-party server, processed remotely, and then — maybe — deleted after a few hours. You're trusting a service you've never heard of with your contracts, tax documents, medical reports, and personal photos.
We built Folium to solve this problem. Every single tool on this website runs entirely inside your browser using open-source JavaScript libraries — primarily pdf-lib and pdf.js. When you upload a file, it never leaves your device. Your browser processes it locally, generates the result in memory, and offers it as a download. No byte of your file ever travels to our server — because we don't have one for file processing.
You can verify this yourself. Open any tool, select a file, then open your browser's Network inspector (press F12, click the Network tab, and run the tool). You'll see zero file upload requests. That's the whole point.
We provide 20 free PDF tools covering the most common document tasks people face every day:
All 20 tools are completely free to use, with no signup, no watermarks added to your output, and no usage limits.
Privacy isn't a feature at Folium — it's the foundation of how the site works. The technical architecture makes server-side file access structurally impossible for our core tools: there is no file upload endpoint. Your files are read by browser APIs (FileReader), processed in JavaScript memory by pdf-lib or pdf.js, and the result object is created locally using URL.createObjectURL(). The download happens from your device's own memory, not from a server.
This approach has limits we're transparent about: very large files may stress your device's memory, and tools like PDF to JPG require the pdf.js library to be loaded from a CDN (Cloudflare) on first use — this is a script download, not a file upload. The CDN sees a request for a JavaScript file, not your documents.
We don't run advertising trackers, session recording tools, or behavioural analytics. Our analytics are minimal and privacy-respecting, used only to understand general site usage patterns — never to track individual users or files.
Folium's tools are built on two open-source libraries that have been production-tested by millions of applications:
All libraries are loaded from Cloudflare's CDN on first use and cached by your browser. No libraries are bundled into our HTML files to keep initial page loads fast.
Folium was created by a small independent team of web developers and document workflow specialists who were frustrated with the existing landscape of PDF tools — specifically the disconnect between how casually people share sensitive documents with unknown services and how little those services do to protect them.
We are a bootstrapped project with no venture capital funding, no enterprise sales model, and no freemium upsell. The site is free because it costs very little to run: there are no servers processing files, no database storing documents, and no cloud storage accumulating user uploads. Our operational costs are essentially just domain registration and static web hosting.
We are committed to keeping Folium free and ad-supported rather than paywalled. If you find the tools useful, the best thing you can do is share the site with others who need it.
We read every message we receive. If a tool isn't working correctly for your specific file, if you have a feature request, or if you've found a bug, please reach out through our contact page. We typically respond within 48 hours.
For privacy-related questions or data concerns, our full privacy policy is available at foliumio.netlify.app/privacy-policy.html.
20 free PDF tools. No signup. No upload. Works on any device.
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