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November 28, 2025

How I Detect Tampered PDFs in 9 Seconds (A Forensics Story)

A PDF contract arrives. How do you know if it's been edited? Here's the xref table trick and 7 forensic markers I built into htpbe.tech to detect PDF tampering.

PDF
TypeScript
Next.js
SaaS
August 20, 2025

PDF Generation on the Server: Puppeteer vs @react-pdf/renderer (A Production Comparison)

I've used both in production — Puppeteer for Pikkuna's Finnish VAT invoices, @react-pdf/renderer for pi-pi.ee's Cyrillic invoices. Here's the honest comparison, the serverless gotchas, and when to use which.

PDF
Node.js
Next.js
TypeScript

Iurii Rogulia

Senior full-stack developer & former CTO. Building production software for 25+ years.

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TMI Iurii Rogulia
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Lappeenranta, Finland

iurii@rogulia.fi