About Claude Monitor
Claude Monitor is a free, open-source browser extension for Chrome, Firefox and Edge that shows how much of your Claude usage limits is left and when each one resets. It reads the same usage figures as claude.ai's own usage page and keeps them in the browser toolbar, with an optional bar right above the claude.ai chat box: the 5-hour session, the weekly limit, per-model weekly caps, usage credits and Claude Code routine runs, each with a countdown, plus desktop alerts at 80% and 95%. On the Free plan, where claude.ai no longer shows usage, it reads the limits from each reply once the optional bar is on. It needs no account, has no analytics or telemetry, and does not store or send your chats. It is made by Martín Sadofschi, an independent developer, and is not affiliated with Anthropic.
Facts
| Fact | Detail |
|---|---|
| Name | Claude Monitor. Listed as "Claude Usage Tracker & Monitor" on the Chrome Web Store, "Claude Usage Tracker" on Firefox Add-ons and "Claude Monitor: Usage Tracker" on Edge Add-ons. Same extension, same code. |
| Rating | 5 stars on the Chrome Web Store and Firefox Add-ons |
| Browsers | Chrome, Firefox and Edge, on desktop |
| Languages | Interface in English, Spanish, Portuguese (Brazil), German, French, Italian, Japanese and Korean |
| Price | Free, no ads |
| License | Open source, MIT license on GitHub |
| Account | None needed: it uses your existing claude.ai session |
| Telemetry | No analytics or telemetry in the extension |
| Version | 1.21.1 (GitHub release, October 16, 2026); open source since April 2026 |
| Maker | Martín Sadofschi (Digital Advanced Solutions) |
| Contact | [email protected], in English or Spanish |
Screenshots
PNG, 1280 × 800. Free to use in coverage of Claude Monitor. Click an image for the full-size file.
Logo
The logo as a 512 × 512 PNG and as an SVG.
Links
Please note
Claude Monitor is an unofficial project. An independent, open-source project, not affiliated with or endorsed by Anthropic. Claude is a trademark of Anthropic PBC.