Open PDF Studio
Open source PDF viewer/editor with it's own blazing fast rust engine
...It uses a Rust-based rendering engine to provide responsive document navigation and editing. Users can highlight text, draw shapes, add comments, insert images, and apply permanent redactions. The software includes measurement tools for architectural and engineering drawings, including calibrated distances, areas, and perimeters. It supports DWG and DXF importing and exporting, optical character recognition, and document comparison. Additional capabilities include digital signature validation, form editing, and page management. Available for Windows, macOS, Linux, and Android, Open PDF Studio provides professional document tools without mandatory subscriptions or telemetry.