
How to Preview HTML Online: Live Rendering While You Code
How online HTML preview works: sandboxed iframes render your markup in milliseconds, with security notes, honest limits, and step-by-step playground usage.
Deep dives into our tech stack, architectural decisions, and scaling challenges. Written by the folks who build the platform.
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How online HTML preview works: sandboxed iframes render your markup in milliseconds, with security notes, honest limits, and step-by-step playground usage.

CSS gradient vs background image decided with measurements: the same visual at 40 bytes versus thousands, when each wins, and the hybrid patterns pros ship.
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JSON Schema explained: validation keywords like type and required, format caveats, code generation, and 8,400 validations per second measured locally.

Local LLM vs API compared: measured model sizes from 2 GB up, privacy tradeoffs, honest crossover math ($22.50/month test case), and which side fits you.

JSON Schema vs TypeScript types: a compiled-and-crashed experiment (0 compile errors, 2 runtime TypeErrors), plus how modern stacks use both together.

Base64 vs base62 compared with real measurements: one 128-bit value at 21 vs 22 characters, alphabet and URL-safety differences, and which fits each job.