ToolStack
38 free AI tools for developers, marketers & creators
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justin pirrie

ToolStack - 38 free AI tools for developers, marketers & creators

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ToolStack is 38 free online tools built for developers, marketers, writers, and creators. No signup, no paywalls, instant results. Tools include: JSON Formatter, JWT Decoder, SQL Formatter, Grammar Checker, Paraphrasing Tool, Hashtag Generator, QR Code Generator, Invoice Generator, UTM Builder, Regex Tester, CSS Gradient Generator, and 27 more. Every AI tool runs on GPT-4o. Everything works in your browser — zero data stored, zero accounts required.

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justin pirrie
Maker
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Hey PH! I built ToolStack because I was tired of tool sites that put basic features behind paywalls or force you to sign up just to use a word counter. Every tool on ToolStack is completely free, no signup, no limits. 31 tools live today across writing, SEO, dev, and finance — with more dropping weekly. Would love feedback on which tools you find most useful and what's missing. What would make you come back every week?
justin pirrie
Maker

Hey PH — I built ToolStack because I kept paying for tools that should be free. Word counters behind paywalls, JSON formatters with forced signups, invoice generators with watermarks.

38 tools live today. No account, no ads (yet), instant results. Built for devs, writers, and marketers who just want to get things done.

Would love brutal feedback — especially on the dev tools. What's missing? What's broken? What would make you actually bookmark it?