The latest articles on DEV Community by Nirmala Valluri (@nirmalavalluri). https://dev.to/nirmalavalluri https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F2830506%2F8b158c3a-053a-49ec-b5ff-ac6575f31009.png https://dev.to/nirmalavalluri en Nirmala Valluri Thu, 04 Jun 2026 13:03:29 +0000 https://dev.to/nirmalavalluri/i-built-121-free-developer-tools-that-run-100-in-your-browser-kaj https://dev.to/nirmalavalluri/i-built-121-free-developer-tools-that-run-100-in-your-browser-kaj <p>Ever pasted a JWT token into a random online decoder and wondered <br> — wait, did that just get sent to their server? 🤔</p> <p>Yes. It probably did.<br> I got frustrated with developer tools that require signups, show ads, or send your data to a server (looking at you, JWT decoders that upload your tokens).</p> <p>So I built DevNova Tools — a collection of 121+ tools that all run entirely client-side in JavaScript. Your JSON, tokens, API keys and passwords never leave your browser.</p> <p>What's in it:<br> • JSON formatter, validator, diff, minifier, schema generator<br> • JWT decoder &amp; generator<br> • Base64, HMAC, UUID tools<br> • Regex tester with live highlighting<br> • Cron expression builder &amp; validator<br> • HTTP status code reference<br> • CSS tools, text converters, encoders<br> • DevOps &amp; infra helpers</p> <p>No signup. No login. No ads. No tracking. Works offline after first load.</p> <p>Would love honest feedback — what tools are you missing? I build the most-requested ones first.</p> <h2> Try it </h2> <p>👉 <a href="https://devnovatools.com" rel="noopener noreferrer">https://devnovatools.com</a></p> <p>All 121+ tools are free, forever. No account needed.</p> <h2> What would you add? </h2> <p>Drop a comment below — I build the most-requested tools first. <br> The community decides what gets built next! 🚀</p> <p>🔗 devnovatools.com</p> webdev javascript devtools productivity