Free Developer Tools
for Modern Web Development
Every tool here runs entirely in your browser — no signup, no server round-trip, nothing saved. Search below or scroll to browse.
Why These Tools Exist
These tools were built to solve repetitive development tasks I encountered while building production applications with Next.js, Supabase, TypeScript and Stripe. Instead of copying snippets or searching through documentation every time, each tool automates a common workflow while keeping everything in your browser. Nothing is uploaded or stored, making them fast, private and free to use.
5 tools
Vercel Cron Expression Generator
Build, validate, and preview Vercel cron schedules
Generate Vercel-compatible cron expressions with a visual schedule builder, live validation, a plain-English description, and a preview of the next 5 execution times in UTC.
- Visual builder for every-minute, hourly, daily, weekly & monthly schedules
- Live validation and plain-English description
- Next 5 execution times previewed in UTC
- Ready-to-paste vercel.json output
JSON-LD Generator
Rich Results eligibility, not just valid syntax
Generate Article, FAQ, Product, LocalBusiness, SoftwareApplication, Breadcrumb, Person, Organization, and Website JSON-LD — checked live against Google's actual Rich Results requirements.
- 10 schema types in one tool
- Live Rich Results eligibility checklist
- HTML & Next.js Script output
Supabase RLS Policy Generator
Strict, pattern-specific Row Level Security policies
Generate separated SELECT/INSERT/UPDATE/DELETE policies for owner-only, team, admin-override, and public-read patterns — with the auth.uid() performance wrapper and required indexes built in.
- Owner-only, team, admin-override & public-read patterns
- Performance-optimized auth.uid() wrapper
- Required index & verification script generation
Zod Schema Generator
JSON or TypeScript straight into a Zod schema
Paste a JSON sample or a TypeScript interface and get a production-ready Zod schema with smart field-name inference — plus React Hook Form, API Route, and Server Action output.
- Smart inference for email, url, uuid & more
- Live JSON validator with per-field errors
- React Hook Form, API Route & Server Action output
Meta Tag Generator
SEO, Open Graph, Twitter Cards & JSON-LD in one pass
Generate SEO meta tags, Open Graph tags, Twitter Cards, canonical URLs, robots directives, and JSON-LD structured data instantly.
- HTML & Next.js Metadata API output
- Open Graph and Twitter Card tags
- JSON-LD structured data included
Frequently asked questions about these developer tools
Do any of these tools send my data to a server?
No. Every tool on this page runs entirely in your browser using client-side JavaScript — table names, JSON samples, and page metadata you type are never sent anywhere.
Are these tools actually free?
Yes, all of them, with no account or signup required. They're built to solve problems I run into myself while building DevStacked and client projects.
Is my generated output saved anywhere?
No. Nothing persists — refreshing the page clears the form and results, so copy your output before you navigate away.
Can I request a new tool?
Yes — reach out through the contact page with what you're trying to solve, and it may end up as the next tool here.