All extensions

Resize images into multiple sizes and aspect ratios, then export them together in a ZIP file.

OneProSeo Site Check by AIO.com.ai

Comprehensive SEO analysis for websites. Check OnPage and OffPage factors, social media reach, and page speed performance.

OneWorks

Developer browser control with session-gated debugging, typed proxy controls, and auditable operations.

Onionskin — Pixel Perfect Overlay: compare design to live page

Design QA overlay. Drop a Figma or Sketch export on any live page, switch to difference view, and align until it goes black.

On Page SEO Analyzer

Comprehensive SEO analysis tool for on-page optimization. Analyze metadata, images, links, and get personalized recommendations.

On-Page SEO Checker & AI Visibility — BEsERP

Check any page's SEO in one click — titles, headings, links, alt text, and whether AI crawlers can actually read it.

On-Page Technical SEO Inspector

Inspects on-page SEO signals, checks for common crawler access issues, and more.

On the Fly

Local-first visual editor for live websites.

OpenBots Web Automation 2.1.0

OpenBots extension for browser communication

OpenCraft

Capture HTML elements from any webpage for AI replication in OpenCraft

OpenDevBrowser Relay

Optional bridge to reuse existing Chrome tabs with OpenDevBrowser.

Open In AWS X-Ray

Adds 'Open In X-Ray' links into SumoLogic query results

open-in-codesandbox

open the public github repo in the codesandbox quickly

Open in CyberChef (updated)

Adds an open selected text in CyberChef option to the right-click context menu

Open in Tower (Unofficial)

Open GitHub repositories in your installed Tower Git client. A lightweight, unofficial shortcut with no tracking.

OpenKey

Self-hosted end-to-end encrypted password manager autofill

OpenModelMap — Deploy Open Models

Deploy commands, benchmarks, hardware & license for HuggingFace models. No synthetic scores — real data only.

OpenThread

Share AI conversation threads to OpenThread

OPFS Explorer

管理和编辑 OPFS 文件系统的开发者工具

OPFS Inspector

Browse and edit a site's origin private file system, including Storage Buckets, from the developer tools.

OpsKit — Offline DevOps Toolkit

Cron parser, CIDR calculator, JWT decoder, Base64/URL/Epoch converters, YAML ⇄ JSON, cheat sheets, HTTP codes & ports. Fully offline

5.0

Optimizely SaaS CMS iframe settings

Dev tool: widen the iframe sandbox of CMS UI extensions (popups, forms, downloads) and set per-frame heights.

Optimum Hub Extension

Compact 3-tab Optimum Hub telemetry extension with 10-minute background auto-sync and X sharing.

Orchestra — Shared AI Memory

Capture web AI chats into Orchestra memory. Recall and inject context into the composer — shared with Cursor, Claude Code, and MCP.