Simplifying engineering data with AI and twenty years in the field
AI-powered engineering tools. Built for a reason.
Upload a file, get a clean result back. No accounts, no clutter.
PLM & Windchill job tracker
Job listings filtered by role, refreshed daily, flagged when the pay looks off, plus resources if you're weighing a PLM career.
Open tracker →3D CAD Viewer
View an STL file in 3D, right in your browser. Nothing uploaded, ever.
Open tool →Drawing Data Parser
Automated parsing for drawing dimensions, GD&T, tolerances, and title block data.
Open tool →PDF tools
Merge, split, rotate, and password-protect PDFs. No account, no watermark, no sign-up.
Open tool → NewPDF redactor
Actually removes sensitive text and images, not just a black box. No account, no watermark.
Open tool → BetaOffline PDF redactor
The only redactor here that works with your wifi off. Same real removal as the main tool.
Open tool →Drawing revision comparator
Upload two drawing versions. See exactly what changed.
Open tool →BOM comparator
Upload two BOMs (CSV or Excel). See what parts changed.
Open tool →Barcode & QR tools
Generate, batch-print, or read barcodes and QR codes. Free, no accounts.
Open tool →Tolerance stack-up calculator
Worst-case and RSS results for a dimension chain, side by side.
Open tool →ISO 286 fit & tolerance lookup
Hole/shaft limits, deviations, and clearance/interference for any standard fit designation.
Open tool →Involute gear generator
Generate a standard gear tooth profile and watch two gears mesh at the correct ratio.
Open tool →Tap drill size chart
Metric, UNC, or UNF thread size in, correct tap drill out, at 75% engagement.
Open tool →Built this because most tools still solve it with manual data entry.
I'm Hari Mathevan. I've spent twenty years building the enterprise
CAD/PLM/MDM systems that manufacturers run on, the unglamorous,
high-stakes work of making engineering data actually work at scale.
These tools are a small piece of that same instinct: solve the
tedious problem properly, instead of leaving it to manual work.
If your team is wrestling with the same thing, I'd genuinely like
to hear about it. Let's talk.
From the blog
Why I built a free PDF merge tool
Every option I found wanted an account, a subscription, or slapped a watermark across the result. So I built one that doesn't.
Read post →