Convert.FAST
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Stewart Celani
Tools.FAST Team

Stewart Celani

Founder, Tools.FAST — 15+ years in enterprise infrastructure and software development

Adelaide, Australia

About
MCSE-certified infrastructure specialist who ships focused tools that solve real problems. Previously built Oversight, a Chromebook classroom monitoring tool that grew to $10K ARR through word-of-mouth among Adelaide primary schools. Now building Tools.FAST—the fastest place on the web for bulk file processing.

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Why Tools.FAST

After years managing enterprise infrastructure and using tools like TinyPNG professionally, Stewart founded Tools.FAST to solve a clear gap: bulk file processing tools that are genuinely fast and built for simplicity. The vision is straightforward—be the fastest place on the web for bulk file processing, getting users in and out within 1-2 minutes.

Key Differentiators

  • Custom Infrastructure: Purpose-built stack optimizing every layer—queue design, server provisioning, bandwidth capacity. P50 conversion times measured in milliseconds for typical files.
  • Focused Excellence: Each tool does one job exceptionally well using best-in-class open source algorithms and commercial libraries where open source doesn't cut it.
  • Measured Performance: Published last 24h median conversion times on each converter, not vague "fast" claims.

Technology Stack

C# / .NET ASP.NET Core PostgreSQL Razor Pages Vue 3

Recent writing

Stewart documents bottlenecks, experiments, and lessons from production systems.