Free tools
Tools for founders, developers, and product teams
Plan, estimate, validate, and build with confidence. Instant results on every tool. No signup required.
Founder & product tools
4 toolsMVP Cost Calculator
How much will your product cost to build?
Get an instant cost range and timeline for your web app, mobile app, SaaS, or marketplace based on features, complexity, and your launch window.
- Instant estimate , no call or signup required
- Based on real Codalyst Tech project rates
- Detailed feature-level breakdown via email
Tech Stack Picker
Which technologies should you build with?
Answer questions about your product type, scale, and budget. Get a concrete frontend, backend, database, and hosting recommendation with clear reasoning.
- Tailored to your stage, scale, and budget
- Covers 7 product types from SaaS to marketplaces
- Full architecture notes and scaling risks via email
MVP Planner
What should actually be in your v1?
Describe your idea, audience, and target features. Get a structured MVP plan: must-haves, nice-to-haves, what to cut, and a suggested build roadmap.
- AI powered plan from a short description
- Separates core features from scope creep
- Full sprint plan and risk areas via email
AI Feasibility Checker
Is your AI feature actually buildable?
Describe what you want AI to do. Find out if it's feasible, which approach to use (API, RAG, fine-tuning, or workflow), and what the real risks are.
- Feasibility score with recommended approach
- Covers 8 task categories from document analysis to predictions
- Full implementation plan and architecture via email
Developer utilities
8 toolsDeveloper Tools Hub
Eight free utilities for everyday developer tasks
JSON Formatter
Browser
JWT Decoder
Browser
TypeScript Types
Browser
ENV Example
Browser
Regex Generator
AI assisted
Cron Builder
AI assisted
SQL Explainer
AI assisted
API Mock Generator
AI assisted
SEO & marketing tools
2 toolsSERP Preview Simulator
How will your page look in Google search results?
Preview your page title and meta description as a live Google result for desktop and mobile. Tweak your copy until it lands perfectly, then share the link directly with clients.
- Instant preview , no signup or API key
- Desktop and mobile SERP views
- Shareable link for client review
QR Code Generator
Custom QR codes with your brand colors and logo.
Generate QR codes for URLs, WiFi, vCards, and text. Choose from 4 design styles, set custom colors, and upload your logo. Download a high-resolution PNG instantly with no watermark.
- 4 styles: Standard, Rounded, Dots, Classy
- Logo upload with automatic error correction boost
- High-res PNG , no watermark, free for commercial use
Need a real expert to review your scope, stack, or AI idea?
Get a free proposalFrequently asked questions
Are all of these tools completely free?
Yes. All 14 tools are free to use with no account required. The founder tools (MVP Cost Calculator, Tech Stack Picker, MVP Planner, AI Feasibility Checker) give instant results free. The developer utilities, SEO tools, and the QR Code Generator are browser-based with no signup at all. Some tools offer a detailed report emailed to you , that is also free.
Do the developer tools send my data to a server?
Four tools run entirely in your browser and never send data anywhere: JSON Formatter, JWT Decoder, TypeScript Interface Generator, and ENV Example Generator. The AI-assisted tools , Regex Generator, Cron Expression Generator, SQL Explainer, and API Mock Generator , send your input to GPT-4o to generate results. These are clearly labelled on the developer tools page.
What is the difference between the founder tools and the developer tools?
The founder tools answer strategic pre-build questions: how much will this cost, which tech stack to choose, whether an AI feature is feasible, and what your MVP should include. The developer tools are day-to-day engineering utilities , formatting, decoding, generating types, and explaining queries. Founder tools are AI-powered and produce structured analysis. Developer tools are fast, often browser-only utilities.
How does the MVP Cost Calculator estimate differ from a real quote?
The calculator uses Codalyst Tech's actual project rate data and scope complexity inputs to produce a directional cost range. It is intentionally a range rather than a fixed number because every project has unique design, integration, and scope requirements. Use the free estimate for planning clarity. For a binding fixed-price proposal, submit your brief via the estimate page and a team member will respond within 24 hours.
Free tools for every stage of building a product
Whether you are a founder validating an idea, a developer debugging an API, or a product manager planning what to build first , these tools cover the most common pre-build and in-build questions without requiring a call, a demo, or a sign-up.
For founders and product teams, the startup tools answer the questions that typically require an agency call: how much will this cost, what tech stack should we use, is our AI idea feasible, and what should actually be in v1. These tools give directional answers instantly, so you can prepare a proper brief and move faster in real conversations.
For developers, the eight browser utilities cover everyday tasks: formatting API responses, decoding JWT tokens, generating TypeScript types from JSON, creating .env.example templates, building regex patterns from descriptions, generating cron expressions, explaining SQL queries, and generating realistic mock API data.
For marketing and branding, the QR Code Generator and SERP Preview Simulator help you control how your brand appears in the physical and digital worlds. Generate a custom branded QR code with your logo, colors, and design style , then preview exactly how your pages appear in Google search results before publishing.
Why Codalyst Tech builds free tools: developers and founders who use these tools are building products. Some will need an engineering team, a dedicated developer, or a custom software build. The tools are genuinely useful on their own , but they also let Codalyst Tech demonstrate technical depth before any commercial conversation happens.