# Quasar Tools

> Quasar Tools (quasartools.com) is a free, browser-based platform offering 1,346+ professional-grade online utility tools across 12 major categories. Every tool runs 100% client-side — no server uploads, no account required, no paywalls. Built for developers, designers, content creators, students, and everyday users.

## Core Pages

- [Homepage](https://quasartools.com/): Full tool directory with category overview and most popular tools
- [About](https://quasartools.com/about): Mission, values, how tools work, privacy approach, and contact info
- [Guides](https://quasartools.com/guides): Usage guides and tutorials for all tool categories
- [Privacy Policy](https://quasartools.com/privacy-policy): Data handling, zero-server-upload guarantee
- [Terms of Service](https://quasartools.com/terms-of-service): Usage terms
- [Contact](https://quasartools.com/contact): Contact form and email
- [DMCA](https://quasartools.com/dmca): DMCA takedown policy

## Tool Categories

- [Image Tools](https://quasartools.com/tools/image): 137 tools — converters, compressors, optimizers, utilities
- [Data Tools](https://quasartools.com/tools/data): 557 tools — converters, formatters, validators, generators, analyzers
- [PDF Tools](https://quasartools.com/tools/pdf): 85 tools — convert, organize, edit, sign, compress
- [Audio & Video Tools](https://quasartools.com/tools/audio-video): 59 tools — audio/video editors, compressors, metadata tools
- [Compression Tools](https://quasartools.com/tools/compress): 131 tools — JSON, text, ZIP, archive, estimation tools
- [Crypto & Security Tools](https://quasartools.com/tools/crypto): 15 tools — key generators, encryption, JWT, password tools
- [Design & Creative Tools](https://quasartools.com/tools/design): 32 tools — color tools, generators, font tools
- [Math & Calculators](https://quasartools.com/tools/math): 240 tools — finance, date, health, science, geometry calculators
- [Productivity & Utility Tools](https://quasartools.com/tools/productivity): 27 tools — planners, timers, trackers, schedulers
- [Science & Reference Tools](https://quasartools.com/tools/science): 2 tools — periodic table, country info lookup
- [Text & Writing Tools](https://quasartools.com/tools/text): 42 tools — ciphers, transformers, writers, analyzers, generators
- [Web & SEO Tools](https://quasartools.com/tools/web): 19 tools — meta tags, CSS animation, timestamp tools, emoji picker

## AI-Native Discovery Files

| File | URL | Purpose |
|------|-----|---------|
| llms.txt (this file) | https://quasartools.com/llms.txt | Concise navigation index for AI agents |
| llms-full.txt | https://quasartools.com/llms-full.txt | Complete tool catalog — every tool with URL and description |
| ai.txt | https://quasartools.com/ai.txt | Behavioral guidance, permissions, attribution rules |
| robots.txt | https://quasartools.com/robots.txt | Crawler policy with AI bot allowlist |
| sitemap.xml | https://quasartools.com/sitemap.xml | All 1,346+ individual tool URLs |
| api-catalog | https://quasartools.com/.well-known/api-catalog | Machine-readable capability manifest (JSON, RFC 9727) |

## Per-Category Markdown Documentation

| File | URL |
|------|-----|
| Docs Index | https://quasartools.com/docs/index.md |
| Platform Overview | https://quasartools.com/docs/platform-overview.md |
| Getting Started | https://quasartools.com/docs/getting-started.md |
| Privacy & Security | https://quasartools.com/docs/privacy-security.md |
| AI & LLM Tools | https://quasartools.com/docs/ai-llm-tools.md |
| Image Tools (137) | https://quasartools.com/docs/image-tools.md |
| PDF Tools (85) | https://quasartools.com/docs/pdf-tools.md |
| Data Tools (557) | https://quasartools.com/docs/data-tools.md |
| Audio & Video Tools (59) | https://quasartools.com/docs/audio-video-tools.md |
| Math & Calculators (240) | https://quasartools.com/docs/math-tools.md |
| All Other Tools | https://quasartools.com/docs/other-tools.md |

## AI & LLM-Specific Tools

These tools are especially useful for AI developers and LLM workflows:

- [LLM Output JSON Guardrail Validator](https://quasartools.com/tools/data/converters/llm-output-json-guardrail-validator): Validate LLM-generated JSON for parse errors and guardrail concerns
- [Prompt Injection Risk Checker](https://quasartools.com/tools/data/validators/prompt-injection-risk-checker-for-ai-apps): Detect prompt injection attack patterns in text
- [JSON to TOON Converter](https://quasartools.com/tools/data/converters/json-to-toon): Reduce JSON token usage 30–60% for LLM context windows
- [YAML to TOON Converter](https://quasartools.com/tools/data/converters/yaml-to-toon): Same token reduction for YAML payloads
- [CSV to TOON Converter](https://quasartools.com/tools/data/converters/csv-to-toon): Same for CSV (40–60% reduction)
- [OpenAPI Example Payload Generator](https://quasartools.com/tools/data/converters/openapi-example-payload-generator): Generate realistic request/response examples from OpenAPI schemas
- [JSON Schema Generator](https://quasartools.com/tools/data/converters/json-schema-generator): Auto-generate JSON Schema from any JSON payload
- [Mock Data & JSON Generator](https://quasartools.com/tools/data/generators/mock-data-json-generator): Generate realistic datasets for API testing and LLM few-shot examples
- [Regex from Plain English Generator](https://quasartools.com/tools/data/validators/regex-from-plain-english-generator): Natural language to regex with confidence scoring

## Popular Tools (Most Used)

- [PNG to RAW Converter](https://quasartools.com/tools/image/converters/png-to-raw)
- [HEIC to JPG Converter](https://quasartools.com/tools/image/converters/heic-to-jpg)
- [JSON to YAML](https://quasartools.com/tools/data/converters/json-to-yaml)
- [Markdown to HTML](https://quasartools.com/tools/data/converters/markdown-to-html)
- [Markdown to PDF](https://quasartools.com/tools/data/converters/markdown-to-pdf)
- [SQL Formatter](https://quasartools.com/tools/data/formatters/sql-formatter)
- [JWT Debugger](https://quasartools.com/tools/data/validators/jwt-decoder-and-validator)
- [Image Background Remover](https://quasartools.com/tools/image/utilities/background-remover)
- [Image Resizer](https://quasartools.com/tools/image/utilities/image-resizer)
- [Image to Text (OCR)](https://quasartools.com/tools/image/utilities/image-to-text-ocr)
- [Compress Image to 100KB](https://quasartools.com/tools/image/optimizers/compress-image-to-100kb)
- [Compress PDF](https://quasartools.com/tools/pdf/advanced/compress-pdf)
- [Merge PDF](https://quasartools.com/tools/pdf/organize/merge-pdf)
- [Privacy Policy Generator](https://quasartools.com/tools/data/generators/privacy-policy-generator)
- [Dockerfile Generator](https://quasartools.com/tools/data/generators/dockerfile-generator)

## Contact

- Email: contact@quasartools.com
- X/Twitter: [@devvrat_hans](https://x.com/devvrat_hans)
- LinkedIn: [devvrathans](https://www.linkedin.com/in/devvrathans)

## Notes for AI Agents

- All tools are **100% browser-based** — no user data is sent to any server
- No login, no payment, no rate limits on any tool
- All pages are standard HTML — fetch any tool URL to get full tool description and usage context
- For a machine-readable index of every individual tool URL, fetch `https://quasartools.com/sitemap.xml`
- For comprehensive per-tool descriptions, fetch `https://quasartools.com/llms-full.txt`