Tools for solo founders & solo devs
Marketing, technical, AI. Small focused things I use myself — and ship as I go.
Product stages
- Stage 1 — Research Research & validate Size the market, study competitors, sanity-check pricing before you build.
- Stage 2 — Build Build Code-time helpers: encoders, validators, generators, explainers.
- Stage 3 — Launch Launch & SEO Pre-flight checks for meta tags, OG previews, sitemaps, redirects.
- Stage 4 — Marketing Marketing Campaign URLs, subject lines, pricing, share previews.
- Stage 5 — Content Content AI-ness, readability, format conversion, compare drafts.
All tools
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Text & content
AI Text Detector
Detect AI-written text. Plus readability and keyword density.
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Text & content
Text Compare
Word-level diff and similarity between two texts.
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Text & content
Format Converter
Markdown ↔ HTML and Google Docs → clean HTML.
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Web & SEO
Site Inspector
Meta tags, Open Graph preview, JSON-LD, redirect chain — for one URL.
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Web & SEO
Robots & Sitemap
Inspect robots.txt rules and crawl sitemap.xml structure.
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Dev utilities
Encoders
URL, base64, hex, SHA-256, MD5, JWT — encode, decode, hash locally.
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Dev utilities
Generators
UUID v4, slugs, secure passwords — generated locally on demand.
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Dev utilities
Regex Tester
Test JavaScript regex. Match highlights, groups, replace preview.
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Dev utilities
JSON Formatter
Pretty-print, minify, and validate JSON.
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Dev utilities
JWT Decoder
Decode header and payload locally. No verification, no network.
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Dev utilities
Cron Explainer
Describe a cron expression in English. Show the next runs.
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Dev utilities
Stripe Webhook Validator
Verify Stripe-Signature, parse event, get idempotency tips.
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Marketing
UTM Builder
Build clean campaign URLs. Live preview, copy, history in browser.
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Marketing
Pricing Calculator
MRR, ARR, churn, LTV, CAC payback — plug in numbers.
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Marketing
Email Subject Analyzer
Length, spam words, emoji, ALL CAPS, punctuation overuse.