
CodeKitHub — Free Online Tools
Format and validate JSON online instantly without uploading your data.
@VeganVegan75738 · X
做了一个免费的 JSON 格式化工具。 支持: ✅ JSON 格式化 ✅ JSON 校验 ✅ 在线使用 ✅ 无需安装,数据不上传 开发者日常调试 JSON 可以直接用: #开发者 #前端开发 #工具
The full gallery
Tech stack
61 projects

Format and validate JSON online instantly without uploading your data.
@VeganVegan75738 · X
做了一个免费的 JSON 格式化工具。 支持: ✅ JSON 格式化 ✅ JSON 校验 ✅ 在线使用 ✅ 无需安装,数据不上传 开发者日常调试 JSON 可以直接用: #开发者 #前端开发 #工具

Block distracting websites by solving math or coding puzzles.
hackitup7 · HN
TLDR built a Chrome site blocker that lets you into distracting sites only after you do some math or simple coding (JS only right now). Direct link to extension (the site just gives you more context): https://chromewebstore.google.com/detail/sphinx-earn-your-di... Philosophically it's a speed bump rather than a hard gate, because you'll eventually tear a gate down but you'll leave a speed bump. I've always eventually removed site blockers, or just had them become a nuisance that I reflexively dismiss before getting to distracting sites. Site blockers don't really reduce the "start navigating to a distracting site" muscle memory, and they eventually just become annoying. Dopamine is a hell of a drug. At the same time, I've been getting frustrated that my intermediate/advanced math skills have atrophied, and becoming more senior in my career (plus AI...) has caused my coding skills to atrophy even further. Realistically I'm not going to force myself to do math or coding exercises aft

An AI-powered platform for solving and collaborating on math problems in a social context.
lemma1729 · HN
Hi HN, This is ProofTree, and in TLDR: it is a platform where you can chat with an AI to do math, the way you already do, with context-awareness and knows how you personally do math, connected to the fora of other live human mathematicians. So, when you are talking to an AI about a proof at 3 am, and you need a human expert looking at it, or a discussion around it, like you do on StackExchange, this is it! You need an approved email account to use it, so please write here if you would live to try it out.

Build robot programs by snapping blocks together with drag-and-drop simplicity and wireless Bluetooth control.
@danenja · X
Unrot the brain. Build a robot.

Watch and steer autonomous coding agents in cloud devboxes with Claude Code, Codex, or OpenCode.
pranav100000 · HN
Aether – Run Claude Code, Codex, or OpenCode in devboxes you can watch

Transform study materials into concise notes and diagrams with AI assistance.
Turbo Learn — 从文档、图片、拼音文件生成笔记的 AI 学习工具网站

Local-first cognitive runtime with live AST graphs, runs in your browser with no data sharing.
@fortsignal1 · X

Security scanner that detects vulnerabilities in AI-generated code repositories.
@GetPrbl · X

Check your resume for ATS compatibility and recruiter best practices
@Pavan092004 · X
hey lets connect, here's im building one tool: feedback is appreciated...!

@JamesAuble https://t.co/GdUqHtJjbA
@Jasoliyaharsh1 · X

Free frontend developer tools for CSS generation, image compression, and more.
@iamdeepak89 · X

Input a math problem to get AI-generated visual explanations for learning.
@laodaozzz · X
我也做了一个教小朋友学数学的工具叫easymath。