About Supertools

Supertools is a collection of 83 free online tools built for developers, writers, designers, and everyday creators. Every tool works directly in your browser — no downloads, no sign-ups, no hidden fees.

Why We Built This

We got tired of hunting down dozens of single-purpose websites every time we needed to format JSON, generate a password, calculate loan interest, or test a regex. Most "free tool" sites are loaded with trackers, watermarks, and paywalls. Supertools puts everything in one clean, fast, private place.

What Makes Supertools Different

No sign-up required. Every tool works immediately. No accounts, no email verification, no "create a free account to continue" pop-ups. Just open the tool and use it.

Privacy-first. Tools that process data do so in your browser when possible. AI-powered tools use our secure API with industry-standard encryption. We don't sell or share your data.

AI-powered when it helps. Over 25 tools use our AI engine to help you write better code, generate content, fix grammar, and solve problems faster. Free users get daily credits — Pro users get unlimited access.

Ad-supported and accessible. Most tools are completely free, supported by non-intrusive ads. A Pro subscription removes ads and unlocks unlimited AI usage.

How We Maintain Quality

Each tool is designed around a specific practical task, then tested with common real-world inputs before it is added to the public collection. Calculators are checked against manual formulas, formatters are tested with valid and invalid examples, and AI tools include reminders to review generated output before relying on it.

We keep the site intentionally simple: pages should load quickly, navigation should be clear, and every public page should provide useful content even before the interactive app loads. If a tool is experimental or not ready for public use, we keep it out of the sitemap until it is polished.

Accuracy & Responsibility

Supertools is built to help with everyday calculations, formatting, writing, and productivity tasks. Finance and legal tools provide general reference information only, not professional financial, tax, investment, or legal advice. AI-generated content may be incomplete or inaccurate, so users should always review results carefully.

Contact & Feedback

Found a bug, outdated result, or unclear explanation? Email [email protected]. User reports help us improve formulas, examples, accessibility, and tool coverage.

Our Tool Categories

Finance tools: Loan calculator, ROI calculator, salary converter, and more. Developer tools: JSON formatter, Base64 encoder, regex tester, cron parser, JWT decoder, and others. AI tools: Resume rewriter, code explainer, SQL builder, prompt enhancer, and 20+ more. Writing tools: Grammar checker, case converter, word counter, paraphrasing. Design tools: Color picker, CSS grid generator, gradient creator. Plus utilities like password generator, QR code maker, world clock, and PDF merger.