TL;DR — I built It's All Dev Tools: 50+ free developer utilities that run entirely in your browser. No uploads. No sign-up. Works offline. Built with Blazor WebAssembly + .NET 8. 🚀
😬 Be honest… have you ever done this?
It's 6 PM. Something's broken in production. You grab a JWT from the logs, Google "jwt decoder", click the first result and paste it in.
Then it hits you:
"Wait… where did that token just go?"
Most online tools quietly send your input to their server. That's fine for lorem ipsum. It's not fine for:
- 🔑 Access tokens and API keys
- 📜 Certificates
- 📦 API payloads with customer data
- 🧾 Internal config files
So I built the toolbox I actually wanted to use.
✨ Meet It's All Dev Tools
| 🔒 Private by design | Everything runs client-side. Your data never leaves the tab. |
| 🚫 No sign-up | Open the page, use the tool. That's it. |
| ✈️ Works offline | Once a page loads, you can pull the network cable. |
| ⚡ Fast | Pages are prerendered to static HTML, then come alive with Blazor. |
| 💸 Free | No paywalls, no "upgrade to Pro" pop-ups. |
👉 Try it now: itsalldevtools.com
🧰 What's in the toolbox?
🧹 Format & validate
JSON Formatter · JSON → C# · JSON ↔ YAML ↔ XML ↔ CSV · SQL Formatter · Regex Tester · Diff Checker · JSONPath Tester · Markdown Preview
🔐 Encode & decode
Base64 · URL Encoder · JWT Decoder · JWT Generator · HMAC · X.509 Certificate Decoder
🎲 Generate
Hashes · GUIDs · Passwords · QR Codes · Fake Data · Cron Builder · .gitignore · Invoices
🔄 Convert
Unix Timestamps · Number Bases · Colors & Contrast · Time Zones · Byte Sizes · Chmod
⚡ Bonus: Electrical engineering
Because why not? 😄
Cable Size & Voltage Drop (IEC/NEC) · Ohm's Law · Power Factor Correction · kW / kVA / Amps · Resistor Color Code · Transformer Fault Current
🛠️ Under the hood
┌───────────────────────────────┐
│ Prerendered static HTML │ ← fast first paint + SEO
├───────────────────────────────┤
│ Blazor WebAssembly (.NET 8) │ ← all tool logic in C#
├───────────────────────────────┤
│ Your browser │ ← the only place your data lives
└───────────────────────────────┘
My favorite perk of using .NET: the Regex Tester runs the real .NET regex engine. What matches here matches in your C# code. No more "works in the JS tester, fails in production" surprises. 🎯
💡 3 things I learned building it
1. Prerendering is a must for Blazor WASM.
Without it, users stare at a loading spinner and search engines see an empty page. With it, content appears instantly and Google can index every tool.
2. Privacy turned out to be the real selling point.
"Runs in your browser" sounds like a tech detail. For developers handling real tokens and data, it's the reason to use the site.
3. Small tools add up.
Each tool is tiny on its own. Together they replace a dozen ad-filled bookmarks.
🙌 Your turn
I'm actively adding new tools, and I'd love your input:
- 💬 What tool do you Google every week? Tell me in the comments.
Thanks for reading my first DEV post! 💜
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