CAD File Feedback
Upload your CAD file
Drop in a DWG, DXF, STEP, IGES or STL file. BugSmash renders the drawing or model in an interactive browser viewer.
CAD File Feedback
Review CAD drawings without a CAD seat
Upload DWG, DXF, STEP or IGES files and let clients, engineers and contractors orbit, measure and annotate the model right in the browser. No CAD software, no logins, no endless PDF markups.
Drag & drop your file
or click to browse · DWG, DXF, STEP or STL, up to 100MB
Free forever No card
View DWG, DXF, STEP, IGES and STL in the browser
Orbit, section and measure without CAD software
Pin comments to exact points on the model
Reviewers need no signup or CAD license
4.8/5Rated by review teams
Loved by1,250+Agenciesand companies in 100+ countries
Watch it work
See BugSmash in action
bugsmash.io
How it works
Three steps to clearer feedback
Get contextual, actionable comments on your CAD file in minutes - no logins for reviewers, no downloads, no chaos.
Share one review link
Send it to clients, engineers or contractors. They orbit, zoom, measure and drop pins exactly where a change is needed.
Revise and compare
Upload the next revision, compare versions side by side and close every thread with full traceability.
Features
Everything you need to ship faster
Annotate, thread replies, compare versions and turn feedback into tasks - all in one place.
Point in space pins
Comments anchor to the exact face, edge or dimension so nothing is lost in translation.
Measure in the browser
Reviewers check lengths, angles and clearances themselves instead of emailing you for dimensions.
Version comparison
Compare drawing revisions side by side and confirm every redline was applied.
Confidential by default
Unreleased designs stay private with password protection and reviewer level access control.
Made for
Who uses CAD reviews?
For architects, interior designers, product engineers and fabricators sharing drawings every week.
ArchitectsProduct teamsAgenciesFreelancers
Architects
Mark up blueprints and 3D walkthroughs so every client and contractor sees the same decision.
BlueprintsPDFs3D models
Product teams
Keep designers, engineers and PMs aligned on exactly what to fix and ship next.
PrototypesMobile appsPPT
Agencies
Run every client review under your own brand with white-label portals and custom domains.
WebsitesBrand videosSlide decks
Freelancers
Share a polished review link and get clear client approvals without asking anyone to sign up.
WebsitesPDFsMobile apps
Use cases
Built for the way real teams work
Client design sign-off
Clients explore the model themselves and approve the design without installing anything.
Contractor redlines
Site teams mark clashes, clearance issues and spec changes directly on the drawing.
Manufacturing reviews
Engineers and fabricators confirm tolerances and features before production starts.
What our customers say
Real stories from teams using BugSmash to replace scattered screenshots, email threads and unclear revision notes.
"Very useful for team input."
The biggest challenge with any new app is peer buy-in to using it. Thankfully the product spoke to them and now everyone is using it. Being able to put a pin on any place of the website and comment on it is much more intuitive than what we were previously doing. We used to use a Word doc with screenshots and notes about what is wrong. After 26 pages, you can imagine it started to get chaotic and cumbersome. BugSmash fixed everyone's workflow. Love how we can assign tasks and prioritise, page by page. And its not just websites too, it can be a multitude of sources, including PDF file uploads and images. Really handy!
"Four Happy Project Clients and Growing."
We have been using the product now for a couple of weeks and already have 4 customers using it to provide feedback on their websites that we support for them. Extremely intuitive for the customer and hopefully, as the intro to this product claims, it will help us end the endless chat and email loops with our customers asking us to 'change the spelling, increase that font size, make this darker, and the list goes on' We had a couple of problems at the onset but support from BugSmash has been exceptional. Keep up the good work. We're looking forward to making this part of our SOP and our Website Care Plans for all of our customers.
"Did what I needed it to do, no fuss and just worked straight out of the box!."
I'm really impressed. After using MANY feedback tools over the years, this worked straight out of the box. No learning curve. Just did exactly what we need it to do. BugSmash integrates straight into ClickUp & Slack - I'm sold <3
"Simply the best!."
BugSmash changed the way you work with customers. Straight to the point, no more ping-pong with emails, clear, stable and fast UI. Now my clients want to use BugSmash for website changes instead of creating support tickets.
"BugSmash - Excellent product, excellent team supporting it!."
I've been using BugSmash for about two weeks or so - it has worked really well on WordPress and Joomla sites, including reorganization of galleries, etc. Ran into an issue on a Wix site I inherited, and raised a support request with the BugSmash team. Nabil was so thorough in his follow up and getting a successful resolution to the issue. Really impressed by this product's ease of use, ability for clients to use with ease, and. most importantly, the BugSmash team's quick response to feedback.
"BugSmash has become an essential tool in my workflow.."
As someone who builds websites and digital projects for clients, collecting feedback used to be messy - long emails, scattered notes, and endless screenshots. BugSmash completely fixed that. Now everything is centralized, visual, and organized directly on the page, which saves me and my clients a lot of time and confusion. It makes collaboration much smoother and more professional. Clients can simply click, comment, and explain exactly what they want changed - no back and forth. What really impressed me is their support team. They respond quickly, are very helpful, and they actually listen. I requested a couple of features and they were implemented faster than I expected, which shows they truly care about their users. If you work with clients or handle revisions/QA, this tool is a no-brainer. Highly recommended.
"Must Have."
This is a must-have tool for anyone looking to gather feedback on design changes. I’ve tried many similar tools in the past, but this one stands out. I used it to collect feedback on a website from a business owner who isn’t very tech-savvy, and they were able to figure it out quickly. They actually enjoyed using it, which made the whole process smooth and efficient.
Frequently asked questions
Which CAD file formats are supported?
BugSmash supports DWG, DXF, STEP and STL files up to 100MB.
Can reviewers measure the drawing?
Do reviewers need CAD software installed?
Can I compare design versions?
Can comments be pinned to a specific part?
Review CAD files without the CAD seat
Upload a drawing, share a link and get precise, pinned feedback from anyone.
