Every developer pastes sensitive data into online tools all day — JWTs, API keys, production JSON, .env values, customer data. And most "free" dev-tool sites do one of three things: upload that data to their servers, bury the tool in ads, or paywall the useful features.
That bothered me enough to build an alternative.
Meet ToolsForDevs Pro
ToolsForDevs Pro is a collection of 55 developer tools that run 100% in your browser. Your data never touches a server — you can open your browser's DevTools → Network tab while using any tool and watch: zero requests carrying your input.
- ✅ No signup, no ads, no upload limits
- ✅ Works offline-style (everything is client-side)
- ✅ Available in 7 languages
- ✅ Free, forever
👉 https://www.toolsfordevs.pro
What's inside (7 categories)
- JSON — formatter, validator, minifier, compare, JSON ↔ XML/YAML/CSV, JSON → TypeScript/POJO
- XML — validator, formatter, minifier, compare, XML → JSON
- Encoding — Base64, URL, image → Base64, case converter, number base, color converter
- Crypto — UUID, hash suite, SHA-256, AES (with proper GCM authentication), RSA, JWT debugger/generator, TOTP generator, password generator
- PDF — merge, split, images → PDF, PDF → images (no upload, unlike the usual suspects)
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Web & SEO — meta tag generator (with live Google + social preview), robots.txt,
.gitignore,.htaccess - Utilities — text diff, regex tester, SQL formatter, Markdown preview, cron, QR code, curl converter, image compressor, ATS resume checker, and more
Why client-side matters
When a tool runs in your browser, your secrets stay on your machine. There's no "did this site just log my JWT?" anxiety. For anything touching credentials or production data, this isn't a nice-to-have — it's the only responsible default. It's also faster (no round-trip) and works even on flaky connections.
A few I'm proud of
- AES encryption that actually authenticates GCM ciphertext (a surprising number of online tools get this wrong).
- A PDF suite that merges/splits and converts images ↔ PDF entirely locally — no uploading your documents to someone's server.
- A meta tag generator with a live Google search + social-card preview as you type.
Try it & tell me what's missing
It's live here: https://www.toolsfordevs.pro
I'm actively adding tools. What would you want next? An image converter? Background remover? A mock-data generator? Drop a comment — I'm building based on what people actually need.
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