
Revievv
GeometryViewer
GrabCAD Workbench
Online 3D Viewer
3D Viewer Online
3D Viewer Max
3DViewer.co
Open3D Viewer
nettest.in
Fast.com
Speedtest.net
Revievv lets engineering teams review 3D CAD models (STEP/STL), PDFs and images directly in the browser. Pin comments on specific points of a 3D model, track issues with severity levels, and share a review link โ reviewers don't need a CAD license or even an account.
Upload a STEP file, invite your team or suppliers by link, collect feedback with precise visual context. No more screenshots in PowerPoint, no more "see page 3, top left corner" emails.
Key features: - 3D STEP/STL viewer in the browser โ no plugins, no installation - Pin comments directly on 3D model surfaces - PDF and image review with annotations and measurements - Share review links โ unlimited free reviewers on all plans - Issue tracking with severity, status and deadlines - Export review as PDF with all annotations - Wire tracing on electrical schematics
Free plan available. No credit card required.
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Revievv
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Revievv's answer
Reviewers don't need a CAD license, an account, or any installed software. Just a link. Most design review tools charge per seat or require everyone to have CAD software. Revievv gives unlimited free reviewers on every plan - so your suppliers, clients and cross-functional teammates can give feedback without any barriers.
nettest.in's answer:
Nettest.in offers a revolutionary solution to internet speed woes. With HTML5-based real-time speed tests and YouTube quality checks
Revievv's answer
Some competitors costs six figures and takes months to deploy. Revievv starts at $0, works in 30 seconds, and does what engineering teams actually need: open a CAD file, pin comments on the 3D model, share a link, collect feedback. No procurement process, no IT department required.
nettest.in's answer:
its user-friendly interface and compatibility across all browsers offer a hassle-free experience for everyone. Additionally, nettest.in prioritizes user privacy by supporting the Tor project, catering to individuals who value anonymity online. Lastly, its commitment to reliability, accuracy, and continuous innovation, powered by cutting-edge technologies, makes it a preferred choice for millions seeking to optimize their internet experience.
Revievv's answer
Built by an engineer with ADHD who got tired of the same broken design review process, also had problems with doing all those related topics โ screenshots in PowerPoint, feedback lost in email threads, "see attachment page 3 top left corner." Every CAD collaboration tool was either enterprise-priced or view-only. Revievv fills the gap: real design review with 3D markup, simple enough to start in 30 seconds, affordable enough for a small team.
nettest.in's answer:
Nettest.in likely emerged from a recognition of the widespread frustration with slow internet speeds and unreliable connections. Its founders may have been motivated by a desire to provide a solution to this problem by creating a platform that offers accurate and real-time internet speed tests and quality checks. Perhaps they envisioned a user-friendly interface accessible across various browsers, prioritizing reliability, accuracy, and user privacy.
Revievv's answer
Three.js for 3D rendering, OpenCascade for STEP/STL geometry processing, Next.js for the web application, and cloud infrastructure for file conversion. Everything runs in the browser โ no plugins or desktop installation needed.
nettest.in's answer:
HTML5: For the front-end interface and interactive elements of the website. JavaScript: Used for adding functionality and interactivity to the website, especially for real-time speed tests. CSS: For styling and layout of the website, ensuring a visually appealing user experience.
Revievv's answer
Mechanical and electrical engineers in teams of 5-50 people โ product design, manufacturing, automotive, aerospace. Engineers who send STEP files by email, mark up screenshots in PowerPoint, and lose feedback in chat threads. Also useful for engineering managers who need documented, traceable design reviews instead of meeting notes in Excel.
Revievv's answer
Revievv is an early-stage product used by small and mid-size engineering teams. We're focused on onboarding our first 100 customers โ teams that need fast, affordable design review without enterprise overhead.
GeometryViewer - Free browser-based 3D model viewer for 3D printing enthusiasts and designers. Open STL, OBJ, GLB, GLTF, 3MF and FBX files instantly in your browser. Get a shareable link, view in AR on mobile, export a GIF, or embed it on Shopify or any website.
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