OnlineOffice — Free, Private, Browser-Based Office Tools

OnlineOffice is a free suite of in-browser office tools. Edit and OCR PDFs, convert images, video, audio and documents, view DXF drawings, IFC building models, STL 3D meshes, DOCX, PPTX, CSV, JSON, Markdown and SQLite files, generate hashes, JWTs, QR codes, passwords and UUIDs, format JSON, diff text, test regular expressions, convert units, calculate expressions, plot functions, pick colors, edit office documents, spreadsheets and drawings. Everything runs locally in your browser — no upload, no backend, no tracking, no sign-up.