Free browser tools
Use Matrix's free developer, writing, SEO, and agent setup utilities without an account or cloud computer.
The Matrix free tools cover small jobs such as formatting JSON, converting CSV, drafting metadata, checking pasted HTML, and validating a common MCP configuration shape. Open a tool, edit its example input, run it, then copy or download the result. You do not need an account, card, or Matrix computer.
Where your input goes
Tool execution happens in your browser tab. Input and output are not uploaded to Matrix by a tool, saved to a Matrix account, or shared with an agent. Closing the tab ends the session. You can copy or download the result if you want to keep it. The website still loads its normal page assets and measures ordinary page visits; tool text is not included in analytics events.
Each tool caps input and output size. The regular-expression tester uses a short-lived browser worker with a timeout. The pasted HTML SEO audit examines the source you provide and does not fetch a live website. Review generated code, metadata, and SEO files before publishing them.
Free tools and a Matrix computer are separate
Free tools complete their own task without signup. A Matrix computer is a paid plan that provides persistent files, connected services, agents, and work that continues after your laptop closes. Using a free tool does not provision a computer or start a trial.
Choosing a tool
- Developer: format or validate JSON, convert JSON and CSV, encode values, compare text, and generate hashes or UUIDs.
- Writing: count words, clean text, preview a small Markdown subset, create slugs, and check word frequency.
- SEO: draft title and description tags, a sitemap, robots.txt, hreflang tags, UTM links, social tags, and simple structured data.
- Agents: review AGENTS.md structure, validate a common
mcpServersJSON layout, estimate prompt size, and explain a five-field cron expression.
These are task-specific utilities, not site crawlers, ranking predictions, general AI models, or complete validators for every client format. The output page explains what each tool checks and what still needs your review.
When you need an agent to work on files, use services, or keep running after you disconnect, explore Matrix OS and its quickstart.
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