This is a legacy tool that still works well on Windows 10/11. The free version converts of a PDF and adds a small watermark. However, for single small drawings, it’s effective.
Convertio offers advanced OCR (optical character recognition) for CAD—something rare in free tools. The free plan allows up to 10 conversions per day (files under 10MB).
Quick, non-confidential conversions where "good enough" is fine. 5. Convertio (Freemium with Generous Free Tier) Platform: Web Browser Output Quality: ★★★★☆