Practical utilities for your daily workflow. No signup, no tracking, no ads. Your data never leaves your browser.
Paste messy JSON, get it beautifully formatted and validated instantly. Syntax highlighting, error detection, tree view, and path copying. The fastest JSON tool on the web.
Paste any JSON, get clean TypeScript interfaces or types — with nested objects, optional fields, union inference, and sensible naming. No signup, runs entirely in your browser.
Paste a package.json, instantly get a polished GitHub-flavored README — with badges, npm/yarn/pnpm/bun install commands, scripts table, and contributing sections. Live preview included.
Build cron expressions visually with plain English descriptions. See the next 5 run times instantly. Never get cron syntax wrong again.
Write and test regular expressions with live matching, capture group highlighting, and plain English explanations of what your pattern does.
Compare frameworks and libraries side by side — community size, performance, learning curve, and ecosystem. Make informed tech decisions.
Create beautiful, structured release notes in seconds. Paste your git log or add entries manually — get formatted output in Markdown, HTML, or Keep a Changelog format.
Bump versions correctly, compare two versions side by side, and validate version strings against the semver spec. Never get MAJOR.MINOR.PATCH wrong again.
Type what you want to do in plain English — "undo my last commit", "rename a branch", "delete remote branch" — and get the exact command, an explanation, and the caveats that'll save you.
Search every HTTP status code — from 100 to 599 plus Cloudflare and WebDAV extensions. For each: what it means, when to return it, common causes when you see it in logs, and a real-world example.
Convert RPS ↔ RPM ↔ RPH ↔ RPD, model token-bucket bursts, plan exponential-backoff retries, and size concurrency with Little's Law. Four calculators in one tool.
Generate a focused review checklist by language (TS, Python, Go, Rust, Java, C#, SQL) and PR type (feature, bugfix, refactor, security, performance, dependency). Copy as Markdown straight into your PR.
Paste any JSON Web Token to instantly decode header and payload, see every claim, get a human-readable expiry status, and catch common security warnings (alg=none, missing exp, long-lived tokens).
Build a Conventional Commits 1.0-compliant message visually. Pick type, scope, breaking-change flag, body, and footers — with live validation, syntax-colored preview, and one-click copy. Eight real-world examples included.
We're a team of engineers who got tired of ad-heavy, signup-required tools that track everything you paste. These tools run entirely in your browser — your JSON, regex, and code never touch a server.
Your data stays in your browser. No server calls, no logging, no analytics on what you paste. We literally can't see your input.
No signup walls, no premium upsells, no "you've reached your limit" banners. Every feature is free, every time.
Instant results, no loading spinners, no waiting for server responses. Everything runs client-side for zero-latency feedback.
We also build free career tools for the modern workplace — or browse open jobs at companies with great engineering culture.