# OtterBrowser/otter-browser

Otter Browser aims to recreate the best aspects of the classic Opera (12.x) UI using Qt5

Repository: https://github.com/OtterBrowser/otter-browser
Canonical: https://ross.abutalabs.com/products/otter-browser
Homepage: https://otter-browser.org
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: qt5, opera, c-plus-plus, qt, browser, qtwebkit, qtwebengine, web, cross-platform, linux, bsd, windows, windowsxp, macos
Last push: 2026-08-25T21:39:37+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 4838, "days_push": 8, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1983, forks 283 (observed 2026-08-28T04:06:01.991576+00:00)

## What it is
Otter Browser is a free, open-source desktop web browser written in C++ with Qt5 that recreates the classic Opera 12.x user interface and its power-user features. It is released under GPL v3 and runs on Linux, BSD, Windows, and macOS.

## Use cases
- browse the web with a classic Opera 12-style interface
- use a lightweight browser with power-user features like custom toolbars and keyboard shortcuts
- replace Opera after its UI redesign
- run a cross-platform browser on Linux, BSD, Windows, or macOS
- use a browser with advanced session and tab management

## When to choose
- you miss the classic Opera 12 UI and workflow
- you want a fast, lightweight, user-controlled browser
- you need a GPL-licensed browser you can compile and modify
- you want deep customization of toolbars, shortcuts, and sessions

## When to avoid
- you need a mainstream browser with wide extension ecosystem support
- you want a modern minimalist browser UI
- you need mobile support
- you require cutting-edge web standards support from Chromium/Firefox

## Facets
- artifact type: application
- maturity: active
- function: gui
- domain: web-development, cross-platform, privacy
- platform: windows, bsd, cross-platform
- tags: web-browser, qt5, opera-12, qtwebkit, qtwebengine, power-user-features, linux, macos

## Member repositories
- OtterBrowser/otter-browser (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:01.991576+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:03:24.790581+00:00, confidence not recorded.
  - readme: https://github.com/OtterBrowser/otter-browser (fetched 2026-08-28T04:06:01.991576+00:00, sha 09d32de3d73d)
- Data as of 2026-08-30T08:39:29.467469+00:00.