DevToolbox

What it does

Free tools for developers: JSON Formatter, JWT Decoder, Regex Tester, Base64 and Timestamp Converter. Fast, secure and 100% client-side.

Simple, fast, and private tools. Everything runs in your browser — no data is ever sent to a server. DevToolbox brings together the tools developers search for every day: formatting JSON, decoding JWT tokens, testing regex, converting Unix timestamps. Every tool runs entirely in the browser. No network calls, no backend. Your sensitive data — auth tokens, production data, business regex — stays strictly on yourfrom devstoolsbox.dev

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  DevToolboxFeb 2026 · devtoolbox.yashnandvana.in · ▲7

  150+ Free Developer Tools in One Place

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  DevTools2025 · onlinewebdevtools.com · ▲18

  Collection of free online tools to help in web development

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  DevTooJun 2026 · devworkbench.tools · ▲2

  Developer tools that run entirely in your browser

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  DevTools Jun 2026 · jsonviewer.live · ▲3

  9 free dev tools in one tab — JSON, JWT, Regex & more

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  DevToolboxJul 2026 · tools.shubhambadgujar.com · ▲5

  47+ developer tools. Free in browser, powerful via API.

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  ViteTools.devNov 2025 · ▲10

  Free online developer tools & utilities

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  /dev/null▲468

  a social network for devs

  Dev tools · 2d 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 · 22d ago · openbot.run

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  Talanoa▲340

  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 · 27d ago · corespeed.io

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  Brew ▲900

  Like Claude design for email marketing

  AI · May 2026 · brew.new

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  Kilo Code for VS Code▲896

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

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  StoreClaw▲806

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

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  PollyReach▲795

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

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  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

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  Files.md – Open-source alternative to Obsidian▲730

  🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md

  Dev tools · May 2026 · github.com