DevMeldex

What it does

DevMeldex is a growing collection of free browser-based tools designed to make everyday developer and web tasks easier. From diff checking and JSON formatting to QR generation and image utilities, it brings practical tools into one simple place. Built for speed, ease of use, and convenience — no installation, no clutter, just useful tools that work.

Free, browser-based developer toolkit: Diff Checker, QR Generator, JSON/CSV Formatter, Image Resizer, Regex Tester, UTM Builder, Timezone Visualizer, and more. No sign-ups; your data never leaves your device. GDPR and CCPA friendly.

10 free, browser-based utilities for developers, marketers, and designers. No sign-ups. No data collection. No server-side processing. Your data never leaves your device. Compare text and code side-by-side with instant highlighting. Plan meetings across global time zones with overlap detection. Build campaign URLs with local history for marketing analytics. Visual shadow, gradient, and border-radius generator for Tailwind. Generate locale-aware fake data for US/UK testing workflows. Test patterns with plain-English explanations and match highlighting. No server round-trips. Tools process data at native speed using WebAssembly and Canvas APIs. Compliant by architecture. No personal data…from devmeldex.com

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  DevTools2023 · ray.run · ▲74

  Making your everyday tasks a breeze

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  DevTools2025 · onlinewebdevtools.com · ▲18

  Collection of free online tools to help in web development

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  Dev NexusJul 2026 · devnexus.biz · ▲8

  All the developer tools you need, in one fast and free

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  DevXPro Tools2025 · devxpro.in · ▲8

  30+ Free developer & utility tools

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  Free:Tools2021 · freetools.dev · ▲11

  Free Tools for programmers, web developers & web designers

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  Free Tools for Developers2024 · ▲12

  Essential free tools for developers, all in one place

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  /dev/null▲483

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

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  Talanoa▲345

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

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  Brila▲1,364

  One-page websites from real Google Maps reviews

  AI · Apr 2026 · brila.ai

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  A game where you build a GPU▲964

  Thought the resources for GPU arch were lacking, so here we are

  Life & fun · Apr 2026 · jaso1024.com

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  I built a tiny LLM to demystify how language models work▲915

  Built a ~9M param LLM from scratch to understand how they actually work. Vanilla transformer, 60K synthetic conversations, ~130 lines of PyTorch. Trains in 5 min on a free Colab T4. The fish thinks the meaning of life is food. Fork it and swap the personality for your own character.

  AI · Apr 2026 · github.com

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  Fathom 3.0▲800

  AI meeting notes: now bot-free, in ChatGPT & Claude + more

  AI · Apr 2026 · fathom.ai

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  Brutalist Concrete Laptop Stand (2024)▲786

  I made a laptop stand out of solid concrete, in the style of brutalist architecture, with themes of urbex and urban decay

  Life & fun · Apr 2026 · sam-burns.com

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  I built a frontpage for personal blogs▲783

  With social media and now AI, its important to keep the indie web alive. There are many people who write frequently. Blogosphere tries to highlight them by fetching the recent posts from personal blogs across many categories. There are two versions: Minimal (HN-inspired, fast, static): https://text.blogosphere.app/ Non-minimal: https://blogosphere.app/ If you don't find your blog (or your favorite ones), please add them. I will review and approve it.

  AI · Apr 2026 · text.blogosphere.app