acento.io

About Acento

Acento is a suite of free developer tools that run 100% in your browser. No accounts, no uploads, no tracking on the tools themselves.

How it works

Every tool uses native Web APIs — JSON.parse, crypto.subtle.digest, TextEncoder, crypto.randomUUID. When you format a JSON or compute a SHA-256 hash, the computation happens on your device. Your input never leaves your browser.

Languages

Available in English, Spanish, Portuguese, German, and French, with localized URLs and content for each language.

Technology

  • Astro 5 for static HTML generation
  • React 18 islands for interactive components
  • Tailwind v4 for styling
  • Cloudflare Pages for hosting

Who builds Acento

Acento is built and maintained by Carlos Suárez, a Staff Software Engineer with over 10 years of experience co-leading architecture and hands-on development of mission-critical backend systems for money, identity, and risk control in hyperscale fintechs.

He currently leads architecture and technical standards across financial services, authentication, onboarding, and fraud prevention at a hyperscale fintech (27M+ users), where the system processes tens of millions of logins, biometric validations, and financial queries every day. He has led core-banking migrations, modernization from monolithic architectures to microservices, and the build-out of cloud-first AWS platforms — both defining the technical direction and writing code.

Areas of expertise: backend, distributed systems, relational and NoSQL data, CI/CD, security-by-design, and infrastructure as code, pushing reusable patterns that other teams adopt at scale. Current interests: identity platforms, financial engines, real-time antifraud, scalable cloud architectures, and Staff-level technical leadership.

Acento is a personal, solo-maintained project — no investors, no roadmap pressure, no growth-hacking. Tools ship when they are useful and correct.

You can verify or follow Carlos on GitHub, LinkedIn, or X (Twitter).

Feedback

Have a tool you'd like to see added, or found a bug? Email hello@acento.io.