Free tools

Free tools for Chrome extension developers.

Small, fast, no-signup utilities for the everyday work of shipping a Chrome extension — from the manifest to the Web Store listing to the moment a user uninstalls.

Manifest V3 Generator

Build a valid manifest.json from a visual form, with inline warnings for trust-heavy permissions.

Works with UserFeed

Web Store Asset Resizer

Turn one image into every Chrome Web Store size — icons, promo tiles, and screenshots.

Works with Screenshot Framer

Icon Generator

Turn one image into every Chrome extension icon size (16–128) plus the 440×280 promo tile.

Works with Screenshot Framer

UserFeed

Feedback boards

Let users post and vote on what to build next — a public roadmap your extension's users can follow. Free for your first extension.

See feedback boards

Tile Cropper

Crop any image to the exact 440×280 Chrome Web Store promo tile.

Works with Screenshot Framer

Marquee Generator

Crop any image to the exact 1400×560 Chrome Web Store marquee tile.

Works with Screenshot Framer

Screenshot Beautifier

Turn a raw screenshot into a polished 1280×800 store image with frame, shadow, and caption.

Works with Screenshot Framer

Store Asset Checker

Validate your listing icons, screenshots, and tiles against each store's exact required sizes.

Works with Screenshot Framer

UserFeed

Uninstall feedback forms

Find out why users leave with a hosted uninstall survey built for Chrome extensions — every uninstall becomes a fix, not a mystery.

See how it works

Manifest Validator

Catch errors, deprecated keys, and the exact permission warnings your users will see.

Works with UserFeed

MV2 → MV3 Checker

Paste a Manifest V2 file and see exactly what to change for Manifest V3.

Works with UserFeed

Extension Inspector

Inspect any published extension's manifest, permissions, and size by ID or Web Store URL.

Works with UserFeed