Eleven small, fast, single-purpose tools. Everything runs in your browser — no uploads, no signup, no tracking beyond a minimal Cloudflare beacon.
Binary, octal, decimal, hex, and any base 2–36 — live bit grid, BigInt, copy-as-code
base.platotools.com NewMD5, SHA-1, SHA-256, SHA-512, HMAC — file checksums, compare hashes, browser-side
hash.platotools.com NewJavaScript RegExp tester — inline match highlighting, capture groups, token explanation
regex.platotools.com NewHEX ↔ RGB ↔ HSL ↔ HSV ↔ CMYK, WCAG contrast checker, color blindness simulation.
color.platotools.com NewSide-by-side and inline diff. 100% browser-side — your code stays local.
diff.platotools.com NewBase64, URL, hex, HTML, JWT, ROT13. Auto-detect what you paste.
encode.platotools.com NewUnix timestamp converter, date math, batch convert, copy-as-code in 6 languages.
time.platotools.com NewCount tokens across GPT-5, Claude 4.7, Gemini 2.5 + estimate monthly API spend.
tokens.platotools.com NewFormat, validate, redact secrets. Built after the 2025 JSONFormatter breach.
json.platotools.com NewParse Unix, GitHub Actions, Vercel, AWS, Cloudflare cron expressions into plain English.
cron.platotools.comUUID v4, UUID v7, ULID, NanoID — generate up to 100 at once, browser-side
uuid.platotools.comMost online developer utilities upload your data to a server to "process" it. That data lives in their logs forever, or worse — leaks when they get breached (see the 2025 JSONFormatter incident). plato·tools is a deliberate alternative: every tool runs entirely in your browser, with verifiable behavior.
Each tool is fully self-contained on its own subdomain (e.g. json.platotools.com). This means the JSON tool's code never loads when you're using the cron tool. Each subdomain is a single ~12 KB HTML file that loads in milliseconds. SEO ranking is also per-subdomain, so each tool can rank on its own merits for its keyword.
Only Cloudflare Web Analytics — anonymous, cookieless, just page-view counts and country. No GA4, no tracking pixels, no fingerprinting. You can verify by opening DevTools → Network and pasting your input: you'll see zero outbound requests carrying your content.
Free, no signup, no ads currently shown. Once we hit ~500 visitors/day we plan to apply for Google AdSense to keep the lights on — but ads will be unobtrusive (no popups, no autoplay videos, no interstitials). If you'd rather not see any ads, use an ad-blocker; the tools work either way.
Once the page is loaded, yes — the tool runs entirely in your browser. The single HTML file caches normally. We don't ship a service worker for explicit offline mode yet, but it's on the list.
Indie operator (@Realcryptoplato on GitHub). The portfolio is built mostly via AI-assisted development — see the open-source repo for the build pipeline.
Open an issue on GitHub describing what tool, what you expected, and what happened. Most fixes ship within a few days.
Absolutely — please do. Each tool is a permanent URL. Examples:
• cron.platotools.com — Cron expression parser
• json.platotools.com — JSON formatter + validator
• tokens.platotools.com — LLM token counter