codefmt: code formatter and linter by codefmt

format and lint javascript, python, and hubl in zapier, n8n, pipedream, make, and hubspot editors. powered by biome and ruff.

Available on Firefox for Android™

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About this extension

SUMMARY:

format and lint javascript, python, and hubl in zapier, n8n, pipedream, make, and hubspot editors. powered by biome and ruff.

DESCRIPTION:

Format and lint your code directly inside automation platform editors. No copy-paste to VS Code or any other editor required.

Supported platforms:

Zapier (Code by Zapier action: JavaScript and Python)
n8n (Code nodes: JavaScript and Python, on n8n.io and n8n.cloud)
Pipedream (Code steps: JavaScript and Python)
Make (JavaScript code modules)
HubSpot Data Hub (custom code actions: JavaScript and Python)
HubSpot CMS / Design Manager (HubL templates with HTML and CSS contexts, plus module.js)

How it works:

Open a code editor on any supported platform.
Use any of three ways to format:
- Click the codefmt icon in your browser toolbar, then press "format code". Every lint finding is listed right in the popup.
- Right-click and select "Format with codefmt" (format only) or "Fix with codefmt" (format plus safe lint fixes plus organize imports).
- Press Ctrl+Shift+F while your cursor is in the code editor. Same combo on Mac.
Your code is formatted and written back to the editor instantly.
A notification appears at the editor with the top 3 lint findings, each showing its line, rule, and message, errors first. Hover it to keep it open, click it or press Esc to dismiss.

Features:

Platform-aware formatting that understands each platform's code structure (async wrappers, globals, return styles, line-width conventions)
Auto-detects JavaScript, Python, and HubL (including HTML, CSS, and JavaScript contexts inside HubSpot Design Manager)
Instant lint diagnostics powered by oxlint for JavaScript and Ruff for Python, both Rust tools built for speed
JavaScript and TypeScript formatting powered by Biome, with Prettier-compatible output
Python formatting and linting powered by Ruff
HubL formatting and linting via a custom formatter built for HubSpot CMS templates
"Fix with codefmt" right-click action that applies safe Biome lint fixes and organize-imports in one pass
Configurable formatting: print width, quote style, semicolons, trailing commas, bracket spacing, arrow parens, JSX quote style, quote properties, bracket same line, and organize imports
Sync settings from codefmt.dev with one click. Configure on the web, use in the extension. Settings are kept per platform.
Keyboard shortcut: Ctrl+Shift+F, active while your cursor sits in the code editor
Light and dark theme, following your system by default
Per-tab badge shows "fmt" on supported sites so you know the extension is live
If Firefox's site access for the extension is off or gets revoked, the popup detects it and offers a one-click fix, and the badge shows "!" instead, so a silent extension is never a mystery
Works with Monaco and CodeMirror 5 / 6 editors, the engines used by all supported platforms
50 KB code size limit per format request
30 second request timeout with automatic retry on transient network failures

Privacy and data handling:

No accounts, no cookies, no tracking, no telemetry
Your formatting preferences are stored locally in your browser only
When you trigger a format, the code currently in your editor is sent over HTTPS to codefmt.dev/api/format, processed in memory, and returned formatted. Nothing is written to a database, logged, or shared with third parties.
The extension only runs on the supported platform domains listed above (plus codefmt.dev for the optional settings-sync feature)
Full privacy policy: https://codefmt.dev/privacy

Security:

Manifest V3 with minimal permissions (activeTab, contextMenus, storage, scripting)
Only the supported platform domains can trigger format requests
Every internal message is validated for sender identity and origin before any network call
Hardened content security policy on the extension pages
No remote code execution. All scripts are included in the extension package and are plain, human-readable JavaScript with no minification or build step.

Built on:

Biome (biomejs.dev): Rust-based, Prettier-compatible formatter that powers JavaScript and TypeScript output
oxlint (oxc.rs): a Rust-based JavaScript linter with a familiar rule set
Ruff (astral.sh/ruff): Rust-based Python formatter and linter used by major Python projects

Learn more:

Web formatter: https://codefmt.dev
About and support: https://codefmt.dev/about
Privacy policy: https://codefmt.dev/privacy

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Permissions and data

Required permissions:

Access your data for sites in the zapier.com domain
Access your data for sites in the n8n.io domain
Access your data for sites in the n8n.cloud domain
Access your data for sites in the pipedream.com domain
Access your data for sites in the hubspot.com domain
Access your data for sites in the make.com domain
Access your data for zapier.com
Access your data for n8n.io
Access your data for n8n.cloud
Access your data for pipedream.com
Access your data for hubspot.com
Access your data for make.com

Optional permissions:

Access your data for sites in the zapier.com domain
Access your data for sites in the n8n.io domain
Access your data for sites in the n8n.cloud domain
Access your data for sites in the pipedream.com domain
Access your data for sites in the hubspot.com domain
Access your data for sites in the make.com domain
Access your data for zapier.com
Access your data for n8n.io
Access your data for n8n.cloud
Access your data for pipedream.com
Access your data for hubspot.com
Access your data for make.com
Access your data for codefmt.dev

Required data collection, according to the developer:

Website content