Edit PDFs privately

Q: Are my files uploaded to a server?

No. Every PDF is processed inside your browser. Your files are never uploaded to us or anyone else.

Q: Does it work on mobile?

Yes. LambiPdf works in any modern browser on desktop, tablet, and phone.

Q: Is it safe for confidential documents?

Yes. Files are processed locally and redaction flattens pages to images, so LambiPdf is well suited to private and confidential PDFs.

Pick a tool below — merge, split, sign, redact and more, right in your browser. Your files are processed locally and are never uploaded by this app.

Upload your file

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Drop PDF or image files here

Choose files PDFs and images (JPG/PNG). Everything happens on this device.

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Drag pages to change the final order. Use the controls on each page to rotate or remove it.

How to edit a PDF with LambiPdf

Pick a tool. Choose what you want to do from the tools on the home page — Merge, Split, Watermark, Sign, Redact, Compress, OCR and more.
Add your file. Drag and drop your PDF or image, or click “Choose files.” It loads instantly, right in your browser.
Download. Your edited PDF is generated on your device and saved to your Downloads folder. Nothing is uploaded.

Why choose LambiPdf?

Most free PDF websites upload your documents to their servers to process them. LambiPdf does the opposite: it uses your browser to merge, split, sign, and edit PDFs, so sensitive contracts, IDs, and records never leave your computer. It's faster, works offline once loaded, and keeps you in control of your data.

Frequently asked questions

Is LambiPdf really free?

Yes. All tools are free to use with no sign-up and no watermarks. Optional tips via “Buy me a coffee” help keep it running.

Are my files uploaded to a server?

No. Every PDF is processed inside your browser using your device's memory. Your files are never uploaded to us or anyone else.

Do I need to install anything or create an account?

No installation and no account. Just open the site and start editing PDFs.

What can I do with LambiPdf?

Merge, split, extract, rotate and reorder pages, add page numbers and watermarks, sign, redact, fill forms, encrypt/decrypt, convert images to PDF, export pages to images, and extract text.

Does it work on mobile?

Yes — LambiPdf works in any modern browser on desktop, tablet, and phone.

Is it safe for confidential documents?

Yes. Because files are processed locally and redaction flattens pages to images, LambiPdf is well suited to private and confidential PDFs.