Local PDF tools

Choose a PDF task and keep the document in your browser.

These are shipped Lemmafour tools. Document processing runs locally for the listed workflows; app assets may load from the site, but the PDF work happens in your browser.

Open PDF editor Rotate, delete, insert, and annotate pages. Reorder pages in Organize PDF. Crop PDF Trim margins and set the visible page box. Add text Place text on a PDF page and export it as PDF text. Sign PDF Place a typed signature on selected PDF pages. Stamp PDF Add approval, draft, confidential, void, and sign-here stamps. Add image Place PNG, JPEG, WebP, and other browser-decoded images as real PDF objects. Remove watermark / Clean PDF Click a watermark, logo, header, or footer; remove every copy across all pages. Organize PDF pages Reorder, delete, rotate, duplicate, and insert blank pages. Insert pages Insert pages from another PDF into this document. Delete pages Remove pages you no longer need. Rotate PDF pages Rotate specific pages or all pages in your document. Extract pages Pick pages or PDF bookmarks and save them as one new PDF. Split PDF Place visual cuts or type ranges to divide one PDF into parts. Merge with more PDFs Combine this output with other PDFs into one file. Compress PDF Reduce file size for sharing and storage. Images to PDF Combine local JPG and PNG images into a PDF. PDF to Images Export PDF pages as local PNG images and a ZIP.

Privacy wedge pages

Common sensitive-document workflows

Edit a PDF without uploading itEdit PDF text without uploadingAdd text to a PDF without uploadingAdd an image to a PDF without uploadingFill a PDF form without uploadingFill a medical PDF form privatelyFill and sign a PDF contract without uploadingSign a PDF without uploadingSign an NDA on your phone without uploadingStamp a confidential PDF without uploadingRedact a PDF without uploadingRedact a payslip before sharing

Articles and explainers

Understand the local-processing model

How local PDF processing works Local PDF editing vs server-based tools How to merge PDFs privately in your browser