Private PDF tools that run in your browser
PDFLalssi is a free toolkit of 21 PDF tools built around one idea: your documents should stay yours.
Why PDFLalssi exists
Most online PDF services ask you to upload your files to a remote server, sometimes with limits, queues, watermarks, or sign-up walls. That is a lot to ask when the file is a contract, an ID, or a medical record.
PDFLalssi takes a different approach. The tools run inside your own browser, so the files you open are processed on your device and are not uploaded to our servers.
🔒 Private by design
No file uploads. Your PDFs are processed locally on your device.
⚡ Fast and free
No account, no queue, and no watermark added to your output.
🌍 Multilingual
Built with right-to-left and Arabic text support in mind, alongside Latin scripts.
What you can do
- Organize: merge, split, extract pages, remove pages, rearrange and rotate pages, crop.
- Edit: add text, add images, sign, watermark, and add page numbers.
- Convert: PDF to Word, PDF to JPG, PDF to Markdown, and JPG to PDF.
- Protect and fix: protect with a password, unlock files you are allowed to open, repair damaged files, compress, and compare two PDFs.
How it works
When you pick a tool, your browser loads the page and a few open-source libraries. You choose a file, and the work happens in your browser's memory. When you download the result, it is saved straight from your device.
Built on open-source work
PDFLalssi stands on the shoulders of excellent open-source projects, including pdf-lib, PDF.js, JSZip, Tesseract.js, docx, and qpdf (WebAssembly). Each library remains under its own license, and we are grateful to the people who maintain them.