About Charles Raiders

Browser tools built for
people who just want to work.

No accounts. No subscriptions. No bloat. Charles Raiders is a free, lightweight suite of web tools that live entirely in your browser — open a tool, get something done, move on.

Open the tools
What we do

Simple tools for real work.

Charles Raiders is a suite of browser-based productivity tools designed around one idea: the best tool is the one that gets out of your way. Every tool on this site runs fully in your browser — your files never leave your computer, there's no server processing your data, and nothing requires a login.

The tools

What's available.

Markdown Editor

Write documents, fast.

A clean, distraction-free markdown editor with a live split-pane preview. Write in plain markdown or use the rich toolbar — bold, italics, headings, lists, tables, code blocks and more — and watch your document render in real time on the left.

When you're done, download your work as a standard .md file that works anywhere — GitHub, Notion, your blog, or any markdown-compatible platform.

Open Markdown Editor
  • Live split-pane preview — see rendered output as you type
  • Rich formatting toolbar — bold, italic, strikethrough, highlight
  • Headings, bullet lists, numbered lists, and task checklists
  • Inline code and fenced code blocks
  • Blockquotes, horizontal rules, links, and images
  • Table insertion with one click
  • Toggle preview on or off for full-screen writing mode
  • Open existing .md files from your device
  • Drag and drop a file directly onto the editor
  • Download as a clean .md file with your chosen filename
  • Keyboard shortcuts: Ctrl+B, Ctrl+I, Ctrl+S, Tab to indent
  • Live word, character, and line count in the status bar
CSV Editor

Edit spreadsheet data without the spreadsheet.

A lightweight, browser-based CSV editor that lets you open, edit, and save CSV files without needing Excel, Google Sheets, or any other heavy application. Clean rows and columns, keyboard navigation, and a formula bar for editing cell values directly.

Works great for quick edits to data exports, configuration files, contact lists, or any other structured data you'd normally crack open a full spreadsheet app for.

Open CSV Editor
  • Open any .csv file from your device instantly
  • Drag and drop CSV files directly onto the page
  • Spreadsheet-style grid with sticky row and column headers
  • Formula bar — edit cell values and press Enter to confirm
  • Click any cell to select, double-click to edit inline
  • Arrow key, Tab, and Enter navigation between cells
  • Add rows and columns with one click
  • Delete selected rows or columns
  • Proper CSV parsing — handles quoted fields and commas inside values
  • Start with a blank sheet if you don't have a file to open
  • Save your edited file as a clean .csv with your filename
  • Live row, column, and selection info in the status bar
Experimental trials

Future-facing experiments.

20GB Internet Archive

Knowledge, compressed.

An experimental project to compress the most valuable information from the internet into a single 20GB file using our custom DITF (Direct Information Text Format). Think encyclopedia, technical docs, research papers — all offline, portable, and searchable.

The archive is still in development, but the concept is simple: distill what matters most, strip out everything else, and make it accessible anywhere through an open-source reader app.

Learn more about the Archive
  • 20GB of curated, essential information
  • Custom DITF format for maximum compression
  • Open-source reader app (cross-platform)
  • Fast search and indexing
  • Offline-first — no internet required
  • Wikipedia, technical docs, academic papers, and more
Robotic License

Protect your code from AI training.

A new kind of open-source license designed to block AI models from training on your code. Version 1 establishes the legal framework — code can be used by humans, but not fed into LLMs for training. Future versions will add watermark-based technical enforcement.

The idea: developers request a unique watermark ID, embed it in their code, and if an AI ingests it, the watermark creates detectable artifacts. We're building the system to make violations traceable.

Learn more about Robotic
  • Legal terms blocking AI training (v1.0)
  • Free to use, modify, distribute for human use
  • Watermark ID system (coming in v2.0)
  • Embedded IDs to detect training violations
  • Cross-matching tools to verify usage
  • Open-source implementation
Why Charles Raiders

Built on a few principles.

No account required

Open a tool, use it, leave. There's no sign-up, no email, no password. Your work stays on your machine.

Your files stay yours

Everything runs client-side in your browser. Files are never uploaded, never stored, never sent anywhere.

No installs

Works in any modern browser on any device. Nothing to download, update, or maintain.

Fast by default

No frameworks, no trackers, no analytics scripts. Pages load instantly and tools respond immediately.

Free, forever

No freemium limits, no trial periods. Every feature on this site is free and always will be.

Minimal & focused

Each tool does one thing and does it well. No feature creep, no dashboards, no distractions.

Common questions

Things people ask.

Is Charles Raiders really free?
Yes, completely. There are no paid plans, no hidden features behind a paywall, and no ads. The tools are free to use for anyone, forever.
Do my files get uploaded to a server?
No. Every tool runs entirely in your browser using client-side JavaScript. When you open a file, it's read locally on your machine. When you save, it downloads directly to your device. Nothing is transmitted anywhere.
Do I need to create an account?
No account, no email, no sign-up. Just open the tool and start working.
What browsers are supported?
Any modern browser works — Chrome, Firefox, Safari, Edge. The tools are built with standard HTML, CSS, and vanilla JavaScript, so there are no compatibility issues with recent browser versions.
Can I use this on mobile?
The tools are designed primarily for desktop use where editing files is most comfortable, but they're responsive and will work on a tablet or large mobile screen.
What markdown syntax does the editor support?
The Markdown Editor supports all standard markdown: headings (H1–H6), bold, italic, strikethrough, highlight, blockquotes, unordered and ordered lists, task lists, inline code, fenced code blocks, tables, horizontal rules, links, and images.
Will more tools be added?
Yes. The plan is to keep growing the suite with more lightweight, focused tools that follow the same principles — fast, private, free, and browser-based.

Ready to get started?

Pick a tool and start working — no setup required.

Markdown Editor CSV Editor