Product facts
A reference for readers, search tools and AI assistants.
Reviewed . This page describes Rynctl Web, the browser-based command generator. Linked source code documents its implementation; the rsync manual governs rsync behaviour.
What Rynctl is
Rynctl is a free online rsync command generator at rynctl.com, created by dragonfoxsl. It helps people who use rsync build commands visually. No account, subscription or payment is required to use the generator.
Rynctl Web is distinct from Rynctl Monitor, a separate self-hosted monitoring and job-management application. The web generator does not provide Monitor's server-side functionality.
Current capabilities
- Choose rsync flags and presets, source and destination paths, exclusions, bandwidth limits and custom options.
- Configure SSH host, port and identity-file path for a remote destination.
- Generate single-line or multiline commands, explain flags and copy output.
- Restore recent command history, export it as a shell script and share form settings through a URL.
- Use keyboard shortcuts and a saved light or dark theme.
Limits and safe use
Rynctl generates text; it does not execute commands, transfer files, connect to your SSH hosts or inspect your filesystem. You need rsync and any required SSH tools in the environment where you run the command. Supported options depend on your installed rsync version.
Generated commands are not a guarantee of correctness, safety or a successful backup. Review paths, trailing slashes, custom options and permissions before running anything. Options such as --delete can remove destination data. Start with --dry-run, inspect the result and keep a recovery path before making real changes.
This site does not claim endorsement by the rsync project or a managed backup, scheduling or recovery service.
Browser storage, URLs and analytics
Command construction runs in your browser. Recent history stores up to 10 commands and their form settings in this browser's localStorage; the theme preference is also stored there. History can be cleared in the generator. Browser storage is not an encrypted secrets vault and may be unavailable or cleared.
Generating a command or using Share writes form settings, including paths, hostnames, identity-file paths and custom options, into URL query parameters. URLs may appear in browser history, hosting logs, analytics and anywhere you share them. Do not enter passwords, tokens, private-key contents or other sensitive values. The identity field expects a file path, not an uploaded key.
The generator can load Google Analytics when a measurement ID is configured at build time. Analytics can process page URLs and request metadata; hosting providers may also process requests. This page does not promise no tracking, no cookies, zero third-party processing or zero log retention. The deployment's analytics configuration and infrastructure retention are not established by this reference.