DevToolbox - 51 free developer tools that run entirely in your browser

Hey PH! 👋 Maker here. I kept switching between 6–7 different tool websites while working — one for JWT, another for JSON, another for regex. Most of them had intrusive ads inside the tool area, required sign-ups, or sent your data to their servers. So I built DevToolbox as the single tab I keep pinned. A few decisions I'm proud of: — All processing is client-side. I went out of my way to ensure nothing is transmitted, even for tools like SSL Checker and DNS Lookup (those use a Cloudflare Worker proxy so the API call comes from the edge, not from your browser leaking your query). — Keyboard shortcuts everywhere: Ctrl+Enter to run, Ctrl+K to clear. — Example button on every tool — one click loads real sample data so you can see what the tool does immediately. What's coming next: → More tools (HTTP Header Analyzer, TOML↔JSON, JWT Generator with custom claims) → Shareable URLs for all tools (hash-based state, already works in JSON Formatter and Base64) → Offline PWA support Would love feedback — especially if there's a tool you reach for daily that I haven't built yet. Happy to prioritize based on demand. https://freecodtools.dev