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Curated collection · 8 tools

Browser-Based Engineering, CAD & Technical Utilities

Every engineering, CAD and technical tool in this collection runs in your browser, so there’s nothing to install and no virtual machine to set up. That helps if you’re on a Mac or Linux machine and the usual software is Windows-only, or on a work or school computer where you can’t install anything. Most of them are aimed at engineers, automation technicians, students and developers. You’ll find online PLC simulators for practising ladder logic and HMI design, viewers for checking 3D CAD models, and converters for STEP and STL files. There are also IP, DNS and ASN lookups for network troubleshooting, calculators for estimating LLM API costs, a few cross-platform workstation utilities, and file and PDF tools that do their processing locally in the browser.

  1. 01

    PLC Simulator

    plcsimulationsoftware.com

    Free browser-based PLC simulator for ladder logic, Structured Text and HMI design, with graded scenarios. Pro is $29 a month.

    SaaS Freemium Cloud
  2. 02

    CADProps

    cadprops.com

    Browser-based CAD tools for viewing, measuring, converting, comparing, and sharing engineering models without installing desktop software.

    SaaS Free Cloud
  3. 03

    HackMyIP

    hackmyip.com

    HackMyIP provides IP, DNS, privacy, security, network, and developer tools with a free no-key API

    Developer Tools Free N/A
  4. 04

    cl0q

    cl0q.com

    Free search engine with its own crawler and index and no search logs, plus ip:, asn: and favicon search.

    Developer Tools Free N/A
  5. 05

    AICost

    aicost.tools

    Independent LLM API price desk: compare model pricing across OpenAI, Anthropic, Google and more.

    AI Tools Free Cloud
  6. 06

    ConvertAny

    convertany.net

    ConvertAny converts files, including audio and video, across 300+ formats with browser access, cloud processing, and automatic deletion

    Video & Audio Free Cloud
  7. 07

    ApexPDF

    apexpdf.com

    ApexPDF is a free, privacy-first PDF suite with 100+ browser-based tools for conversion, editing, security, OCR, and file management

    SaaS Free N/A
  8. 08

    DisplaySwitcher

    nebulasoftware.com

    Switch monitor inputs and transfer text and files between Linux, macOS, and Windows without network or firewall configuration.

    Developer Tools Paid N/A
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