Sandalio Developer Toolbox

What it does

Sandalio Developer Toolbox is a free collection of lightweight tools for developers: JSON and XML viewers, JWT inspector, regex tester, cron explainer, SQL formatter, Markdown previewer, diff checker, text utilities, color tools, SVG converter and SVG generator. It is built for quick daily tasks: open the tool, solve the problem, keep working. No login, no heavy SaaS flow, no nonsense.

Free developer toolbox with JSON, XML, JWT, regex, cron, SQL, Markdown, text, color and SVG tools. Fast browser-based utilities in one clean hub.

Quick access to the local utilities running on this machine. Everything is browser-side unless the individual tool saysfrom camaguayos.com

• 
  Free Tools for Developers2024 · ▲12

  Essential free tools for developers, all in one place

• 
  ViteTools.devNov 2025 · ▲10

  Free online developer tools & utilities

• 
  Developer Tool BoxJul 2026 · developertoolbox.tech · ▲1

  Free browser-based utilities for everyday dev tasks

• 
  Dev Toolbox - Developer UtilitiesApr 2026 · dev-toolbox.veenu.ch · ▲3

  CSS, JSON & Regex tools — all in one place, zero installs

• 
  Toolaska2025 · toolaska.com · ▲7

  Free online developer tools | json, encoding, code compare

• 
  SearchZee Web ToolsAug 2026 · searchzee.com · ▲2

  32 developer & writing tools that run in your browser

• 
  /dev/null▲486

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

• 
  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 · 28d ago · github.com

• 
  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 · 26d ago · github.com

• 
  OpenBot▲362

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

  Dev tools · 23d ago · openbot.run

• 
  Talanoa▲346

  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 · 21d ago · talanoa.email

• 
  CoreSpeed▲332

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

  Dev tools · 28d ago · corespeed.io

• 
  Brew ▲900

  Like Claude design for email marketing

  AI · May 2026 · brew.new

• 
  Kilo Code for VS Code▲896

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

• 
  StoreClaw▲806

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

• 
  PollyReach▲795

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

  AI · May 2026 · pollyreach.ai

• 
  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

• 
  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