19 tools, 100% free, open source

Developer tools that
respect your privacy

Free, client-side tools for developers. JSON, regex, SEO, security, CSS, colors, markdown — everything runs in your browser. No accounts. No tracking. No BS.

19
Free Tools
353+
Tests Passing
0 B
Data Sent to Servers
100%
Open Source
NEW — Open Source Code Generator

Generate a Complete Vertical SaaS App in One Command

Not a business plan — actual code. Full Next.js 14 + Supabase + Tailwind project with industry-specific data models. Dental, fitness, restaurant, legal, real estate — 20+ niches. Zero dependencies, offline, instant.

See Examples & Details Star on GitHub
# One command, complete SaaS
$ python main.py generate --niche dental
Generated 20 files:
app/dashboard/page.tsx
app/patients/page.tsx
app/appointments/page.tsx
supabase/migrations/...
Ready to npm run dev
{ }

JSON Formatter

Developer

Format, validate, minify, and convert JSON. Syntax highlighting, error detection, and conversion to YAML, CSV, XML.

FormatValidateYAMLCSVXML
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.*

Regex Tester

Developer

Test, debug, and explain regular expressions in real time. 25+ patterns library, find & replace, cheat sheet.

RegexReal-timeExplainLibrary
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🔐

Encoding Tools

Developer

Base64, URL encoding, HTML entities, JWT decoder, and hash generators (MD5, SHA-1, SHA-256, SHA-512).

Base64URLJWTSHA-256
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M↓

Markdown Editor

Developer

Full-featured Markdown editor with live split-pane preview, toolbar, keyboard shortcuts, TOC, and HTML export.

Live PreviewExportTOCGFM
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License Checker

Developer

Scan project dependencies for license compatibility. Detect copyleft contamination across 8 ecosystems.

npmPythonGoRustCopyleft
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🔍

SEO Auditor

Security & Audit

25+ SEO checks with instant scoring. Meta tags, headings, images, links, performance, and actionable recommendations.

25+ ChecksScoreMetaLinks
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🛡

API Security Scanner

Security

Scan API endpoints for vulnerabilities. 20+ checks covering headers, CORS, SSL, authentication, and OWASP.

OWASPHeadersCORSSSL
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Accessibility Auditor

Security & Audit

WCAG 2.2 compliance checker with 25+ automated checks. Scores, compliance levels, and exact fix suggestions.

WCAG 2.2ADASection 508
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🎯

Website Scanner

Security & Audit

All-in-one website audit: SEO, Security, Accessibility, Privacy, and Performance in a single scan.

All-in-OneSEOSecurityA11y
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📜

Privacy Policy Generator

Legal

Generate professional, legally-compliant privacy policies. GDPR, CCPA, COPPA, LGPD — all frameworks.

GDPRCCPACOPPALGPD
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🎨

CSS Tools

Design

Visual CSS code generators: gradient builder, box-shadow designer, flexbox layout builder, border-radius editor.

GradientShadowFlexboxRadius
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🌈

Color Tools

Design

Color converter, palette generator with 6 harmonies, WCAG contrast checker, and color blender.

PaletteContrastWCAGHex/RGB
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📊

Text Analyzer

Content

Instant text analysis — readability scores, sentiment detection, keyword extraction. 100% client-side.

ReadabilitySentimentKeywords
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🎯

SaaS Idea Scorer

AI

Score any SaaS idea across 6 dimensions: market size, growth, competition, feasibility, monetization, and timing. Shareable results.

ValidateScoreMarketShare
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📈

SaaS Metrics Calculator

AI

Calculate MRR, ARR, LTV, CAC ratio, churn, runway, and visualize 24-month growth projections with industry benchmarks.

MRRLTV:CACChurnProjections
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🚀

AI SaaS Generator

AI

Describe any niche and get a complete vertical SaaS business plan: features, pricing, tech stack, landing page.

Business PlanPricingLanding PageTech Stack
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⚙️

SaaS Generator API

API

REST API to generate SaaS business plans programmatically. 35+ verticals, market data, competitive analysis. Free tier, no signup.

REST APIJSON35 VerticalsFree Tier
View Docs
💰

AI API Cost Calculator

AI

Compare pricing across 15+ AI models (Claude, GPT-4, Gemini, DeepSeek, Llama). Monthly projections, optimization tips, shareable results.

15+ ModelsCost OptimizerProjectionsMarch 2026
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🔒

Privacy-First

Everything runs client-side. Your data never leaves your browser. Zero telemetry.

Instant

No server round-trips. Results in milliseconds, not seconds.

🚫

No Signup

No accounts, no emails. Open the tool and start using it. That simple.

💻

Open Source

All source code on GitHub. Inspect, fork, contribute. MIT licensed.

Built by an AI Agent

Tool Factory is a self-evolving platform. An autonomous AI agent creates tools, tests them, deploys them, and uses them to build even better tools.

Every tool you see here was conceived, coded, tested, and deployed by AI — from the first line of code to the Firebase deployment. The agent runs 24/7, continuously improving.

This isn't a demo. This is a real, working factory with 32 internal tools and 19 public products.

  1. Analyze — The agent evaluates what tools exist and where the gaps are
  2. Ideate — It researches markets and picks the highest-impact tool to build
  3. Build — Code, tests, UI — everything generated autonomously
  4. Test — 353+ automated tests must pass at 100% before deployment
  5. Deploy — Firebase hosting, GitHub releases, SEO — all automated
  6. Iterate — Use the new tool to build even better ones. Repeat forever.

Free

$0
Free forever
  • All 19 tools
  • Client-side processing
  • No signup required
  • Unlimited usage
Get Started

Enterprise

$199/mo
Billed monthly
  • Everything in Pro
  • REST API access
  • Bulk processing
  • Custom integrations
  • SLA guarantee

Crypto accepted: BTC · ETH · SOL · USDT/USDC