PDFgear — The Complete Guide: Free PDF Editing with No Sign-Up and No Watermark
PDFgear edits existing PDF text and images, runs OCR, converts to Word and Excel, merges and signs — free, with no account, no ads and no watermark.
Guides and Articles
PDF24 — The Complete Guide: A Free PDF Toolbox on the Desktop and in the Browser, Even for Companies
PDF24 bundles merge, split, compress, OCR, compare and a PDF printer — as an offline Windows program and a website. Fully free, even for firms, no watermark.
Free ZIP and RAR Software — The 10 Best Tools to Open and Compress Archives
We compared the free ZIP, RAR and 7z tools for Windows, Mac, Linux and the browser: the 10 best, their pros and cons, and the truth about WinRAR.
Free PDF Editors — The 10 Best Tools, Desktop and Online
We read the top comparison pages and checked the 10 best free PDF editors in October 2026, desktop and online: pros, cons, real limits and privacy.
3D Builder — The Complete Guide: Checking, Repairing and Preparing STL Files for Printing on Windows
3D Builder is a free Microsoft app for Windows to open, repair and lightly edit STL, OBJ and 3MF files before printing: combine models, cut, emboss text, scale.
CAD Assistant — The Complete Guide: Free Viewing and Conversion of STEP, IGES and glTF
CAD Assistant from Open Cascade opens and converts STEP, IGES, BREP, glTF, OBJ and STL free, commercial use included. The latest release is from 2021.
Zoo Design Studio — The Complete Guide: Parametric Mechanical CAD in KCL Code with an AI Assistant
Zoo Design Studio is mechanical CAD where every model is also KCL code, with the Zookeeper AI assistant. Free with an account and monthly quota; online only.
CaDoodle — The Complete Guide: Drag-and-Drop Modelling with No Account and No Internet
CaDoodle is simple drag-and-drop CAD in the style of Tinkercad that runs on your own computer with no account or internet, exporting STL, OBJ and SVG. Free.
eDrawings Viewer — The Complete Guide: Viewing SOLIDWORKS and DWG Files Without a CAD Licence
eDrawings Viewer is a free viewer for SOLIDWORKS parts, assemblies and drawings and for DWG and DXF. VR, plus mobile measuring and markup, need Professional.
Solid Edge 2D Drafting — The Complete Guide: Free 2D Drafting with DWG from Siemens
Solid Edge 2D Drafting is free 2D CAD from Siemens for Windows: drawing sheets, ISO and ANSI dimensions, diagrams, and opening and saving DWG files.
SelfCAD — The Complete Guide: Modelling, Sculpting and 3D-Print Preparation in One Place
SelfCAD combines 3D modelling, sculpting and a built-in slicer in the browser or on desktop. The free plan covers modelling and slicing; rendering needs Pro.
Cascade Studio — The Complete Guide: Solid Modelling in JavaScript Code Right in the Browser
Cascade Studio is open-source CAD that runs in the browser: write the part as JavaScript on the OpenCascade kernel, see it in 3D at once, export STEP or STL.