Free online tools, calculators, generators and games.
Browse the CheeseBridge toolkit: a growing collection of browser-based developer tools, SEO and AI‑search (AEO & GEO) tools, AI utilities, calculators, generators, testing tools and quick games.
- CheeseBridge provides free browser-based tools for practical online tasks.
- Categories include developer tools, SEO, AEO and GEO tools, AI utilities, calculators, generators, testing tools and games.
- Tools are designed to be simple, fast, mobile-friendly and easy to use.
- Learning hubs cover JSON, XML, structured data and AI search (AEO & GEO).
- The Toolkit page is the main directory for CheeseBridge tools.
- Category pages help organise tools by purpose and use case.
- Developer, SEO and calculator tools form the strongest utility categories today.
- New AEO and GEO checkers help you optimise content for AI search engines.
- Generators, testing tools and games expand CheeseBridge beyond technical users.
- The toolkit will continue growing with new tools and learning content.
Browse toolkit categories
AEO Tools
Answer Engine Optimization — audit pages for featured snippets, FAQ schema and direct answers.
View AEO Tools 3 toolsAI Tools
Prompt, email reply and Boolean search tools for smarter AI-assisted workflows.
View AI Tools 6 toolsCalculators
Finance, percentage, odds, savings, tip and graph calculators for quick answers.
View Calculators 11 toolsDeveloper Tools
HTML, CSS, JSON, XML and Markdown tools for formatting, viewing and converting code.
View Developer Tools 3 toolsGames
Quick browser games, randomisers and challenges for fun and group activities.
View Games 3 toolsGenerators
QR code, password and sweepstake generators for reusable outputs.
View Generators 1 toolGEO Tools
Generative Engine Optimization — audit pages to be cited by ChatGPT, Perplexity and AI Overviews.
View GEO Tools 6 toolsSEO Tools
Metadata, structured data, SERP previews, robots.txt and URL tracking utilities.
View SEO Tools 2 toolsTesting Tools
Browser-based screen and keyboard testing tools for quick device checks.
View Testing ToolsFeatured tools
AEO Checker
Audit any page for Answer Engine Optimization and get a score plus fixes.
Open AEO CheckerGEO Checker
Audit any page for AI search (ChatGPT, Perplexity, AI Overviews) readiness.
Open GEO CheckerSchema Markup Generator
Create structured data markup to support search understanding.
Open Schema GeneratorQR Code Generator
Generate QR codes for links, text and shareable information.
Open QR Code GeneratorCompound Interest Calculator
Estimate how money can grow over time with compounding.
Open Compound Interest CalculatorPopular uses
- Format JSON data
- View XML files
- Convert XML to JSON
- Create schema markup
- Generate QR codes
- Build UTM tracking links
- Calculate compound interest
- Check keyboard input
- Create strong passwords
- Run quick browser games
Learning hubs
CheeseBridge combines tools with practical learning guides so users can understand the formats, formulas and workflows behind the tools.
JSON Guides
Learn JSON formatting, validation, parsing, schemas and JSON-LD SEO.XML Guides
Learn XML syntax, validation, namespaces, XPath, XSLT and XML conversion.JSON-LD SEO Guide
Understand structured data for search engines and AI-readable pages.JSON Schema Explained
Learn how JSON schemas define rules and validate structured data.AEO Guides
Learn Answer Engine Optimization — featured snippets, FAQ schema and direct answers.GEO Guides
Learn Generative Engine Optimization — being cited by ChatGPT, Perplexity and AI Overviews.Why use CheeseBridge?
- Free browser-based tools — no sign-up
- Privacy-friendly — audits run in your browser and nothing is stored
- No installation required
- Mobile-friendly layouts
- Simple explanations and practical fixes (not just a score)
- Covers SEO and AI search — AEO & GEO
- Organised categories and learning hubs
- Growing collection of tools, utilities and games