Toolbox 5

What it does

Toolbox 5 is a collection of free online tools, calculators, converters, and generators for everyone.

Free online tools, calculators, converters & generators for everyone.

Quick Sitewide Search Search our tools, categories, and other content on this page. Unit Converters Convert units from one to another instantly using these tools. Trigonometry Calculators Calculate the value of trigonometric functions instantly using these tools. Hash Generators Hash your data with various hashing algorithms instantly using these tools. Freelance Hourly Rate & Fixed-Price Project Budget Calculator Calculate freelance hourly rate & fixed-price project budget instantly using this tool. Upwork Freelancer Service Fee Calculator Calculate freelancer take-home earnings instantly using this tool. Strip HTML - Remove HTML, JS, CSS & PHP Tags Remove HTML, JavaScript (JS), PHP and…from toolbox5.com

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  A directory of single-page sites and useful apps2012 · thetoolbox.cc · ▲164

  Explore a curated collection of the best free time-saving online tools, widgets & web utilities for developers, designers, and creators.

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  DevBox ToolsDec 2025 · devbox.tools · ▲3

  Free online tools

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  ToolCraftJul 2026 · toolcraftbox.com · ▲3

  48 free online tools protect privacy (no uploads,no sign-up)

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  Free online toolboxApr 2026 · variedtools.com · ▲2

  free online tools, online toolbox, web utilities

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  Toolsyne2025 · ▲15

  Your free, fast, and user-friendly online tool hub

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  ToolboxiJul 2026 · toolboxi.eu · ▲3

  Fast, free tools for files, media, code, and everyday work

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  /dev/null▲482

  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▲343

  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

• IT
  I taught my little brother JS, and he made this videogame in a week▲1,079

  Life & fun · 2019 · s-poony.github.io

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  Mkcert – Valid HTTPS certificates for localhost▲839

  Life & fun · 2019 · blog.filippo.io

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  Leave Me Alone▲789

  Easily unsubscribe from spam emails 💌

  Growth · 2019

• HA
  HN.Academy – Top online courses recommended by Hacker News users▲773

  HN Academy collects, ranks, and showcases the best online courses and MOOCs that have been recommended on Hacker News.

  Life & fun · 2019 · hn.academy

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  Clean Mockups▲740

  Create stunning mockups that make your design standout

  Dev tools · 2019 · cleanmock.com

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  Makerpad▲663

  Develop skills, build things and get hired - without code

  Dev tools · 2019 · makerpad.co